CN100578251C - Comprehensive error realtime on-line monitoring method and monitor for high-voltage electric-energy meter - Google Patents

Comprehensive error realtime on-line monitoring method and monitor for high-voltage electric-energy meter Download PDF

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CN100578251C
CN100578251C CN200710130121A CN200710130121A CN100578251C CN 100578251 C CN100578251 C CN 100578251C CN 200710130121 A CN200710130121 A CN 200710130121A CN 200710130121 A CN200710130121 A CN 200710130121A CN 100578251 C CN100578251 C CN 100578251C
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曹锐
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Youteaoke Electronics TECH Co Ltd Taiyuan City
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Abstract

A method for on-line detecting integrated error of high voltage electric energy metering device in real time includes applying precise and special detection instrument to simultaneously carry out on-line detection on at least four integrated errors of high voltage electric energy metering device in real time, using a formula to add said errors for obtaining integrated error of said metering device. The on-line monitor device designed as per said method is also disclosed.

Description

Real-time online monitoring method and monitoring equipment for comprehensive errors of high-voltage electric energy metering device
A technical field
The invention discloses a real-time online monitoring method and monitoring equipment for comprehensive errors of a high-voltage electric energy metering device, belongs to the technical field of high-voltage (such as over 10 KV) and strong-current electric energy metering and detection, and particularly relates to a real-time online (long-term) monitoring method for real-time online and real-time accurate monitoring of the comprehensive errors of the high-voltage electric energy metering device and monitoring equipment designed by the method.
Second, background Art
In the production of electric power systems, electric energy is the final product, and the metering of the electric energy is extremely important. The electric energy metering device is a main tool for metering electric energy, and is an important means for power supply and utilization trade settlement of three parties, namely power distribution, power supply and power utilization. The accuracy of the electric energy metering device is directly related to the economic benefits of three parties, namely, the power generation party, the power supply party and the power utilization party. Therefore, the national related metering regulations stipulate that the accuracy of the electric energy metering device must be regularly checked on site.
The high-voltage electric energy metering device is generally composed of a voltage transformer (PT), a Current Transformer (CT) and an electric energy meter. Correspondingly, the comprehensive error of the high-voltage electric energy metering device consists of PT error, CT error, error caused by PT secondary voltage drop, error of the electric energy meter and the like. At present, two methods of on-site on-line inspection and on-site power failure inspection are mainly used for the on-site inspection of the high-voltage electric energy metering device. The on-site on-line inspection method is to carry the electric energy meter calibrator, the PT secondary voltage drop tester and other equipment to the site regularly, and measure the error of the electric energy meter in the electric energy metering device and the PT secondary voltage drop equivalent under the working state of the high-voltage electric energy metering device. However, for economic and safety reasons, it is not allowed to temporarily connect a precision current transformer and a voltage transformer, which need special insulation reinforcement, to the live-line high-voltage power line for comparison with the field-operated CT and PT, so this method cannot determine the PT error and the CT error. The on-site power failure detection method aims at the defect that the on-site online detection method can not detect PT errors and CT errors, and PT errors and CT errors are measured on site by carrying PT and CT power failure detection equipment when a system is powered off. Because the PT and CT power failure detection equipment comprises a very heavy booster, a current booster, a standard device and the like, the power failure time needs to be coordinated with all relevant aspects, and in addition, the measurement errors of the PT and the CT under the real operation state cannot be accurately obtained during power failure measurement, the field power failure detection method is time-consuming, labor-consuming and inaccurate. Therefore, the existing on-site inspection method for the high-voltage electric energy metering device cannot completely solve the on-site detection of errors of all parts of the electric energy metering device, and cannot completely solve the real-time online long-term detection of the errors of all parts of the electric energy metering device. Therefore, it is urgent and hoped to research a testing method capable of measuring the comprehensive error of the high-voltage electric energy metering device on line in real time. The method successfully researched by the inventor provides a brand-new method for testing the comprehensive error of the high-voltage electric energy metering device, can complete the online real-time measurement of the comprehensive error of the high-voltage electric energy metering device which cannot be completed in the past, is simple and easy to implement, and can accurately measure the comprehensive error of the high-voltage electric energy metering device. The testing device developed and designed successfully according to the method solves the problem that the comprehensive error of the high-voltage electric energy metering device cannot be monitored for a long time in the field of electric energy detection, and also ends the history that no comprehensive error testing device of the high-voltage electric energy metering device exists in the field of electric energy detection, and the method is innovative thinking and creative invention. The invention relates to a real-time online monitoring method and a monitoring device for the comprehensive error of a high-voltage electric energy metering device, which are technically characterized in that: the new detection method is implemented or applied under high voltage (such as over 10 KV) and strong current, and the detection or measurement under the high voltage and the strong current undoubtedly provides comprehensive and more serious challenges for the detection or measurement technology, and the electric energy measurement technology is required to be comprehensively improved to the level of the requirements of high voltage, strong current regulation, safety and the like. The novel real-time online monitoring method and monitoring equipment for the comprehensive error of the high-voltage electric energy metering device can directly and accurately monitor the comprehensive error of high-voltage electric energy metering on line in real time for a long time, can better protect the economic benefits of both power supply and power utilization parties, and also make a contribution to the scientific and technological progress of the electric power industry.
Third, the invention
The purpose of the invention is: the technical scheme of the real-time online monitoring method and the monitoring equipment for the comprehensive error of the high-voltage electric energy metering device is provided for the society, a brand-new accurate means for monitoring the comprehensive error of the high-voltage electric energy metering device and convenient and rapid detection equipment are provided for both power supply and power utilization parties, and the technical scheme also performs some work for the scientific and technological progress of the electric power industry.
The technical scheme of the invention comprises two parts: the technical content of the method for monitoring the comprehensive error of the high-voltage electric energy metering device in real time on line is the first technical content, and the technical content of the device for monitoring the comprehensive error of the high-voltage electric energy metering device in real time on line is the second technical content.
The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is a real-time online, real and accurate method for monitoring the comprehensive error of the high-voltage electric energy metering device for a long time, and is technically characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device comprises the following steps: the comprehensive errors of the high-voltage electric energy metering device to be measured are simultaneously measured or detected in real time on line by adopting a precise and special measuring or detecting instrument, and the errors comprise: the metering error of the high-voltage potential transformer, the metering error of the high-voltage current transformer, the voltage drop of a secondary circuit of the high-voltage potential transformer and the metering error of the electric energy meter are added in real time through a formula, namely the comprehensive error of the high-voltage electric energy metering device is obtained, and for a three-phase three-wire system, the formula is as follows:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Uab</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>ab</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ia</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>3</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ucb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>cb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ic</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C20071013012100172
Figure C20071013012100173
in the formula: epsilon- -the composite error of the high voltage electric energy metering device;
εW1、εW3-relative error (%) of the first and third phase power meters;
P′1、P′3-the measured ac power (energy) values of the first and third phase power meters;
fUab、δUabAB-phase high-voltage potential transformer (or secondary line voltage of high-voltage potential transformer)) The ratio difference (%) and the angle difference (');
fUcb、δUcb-CB phase high voltage transformer (or secondary line voltage of high voltage transformer)
Figure C20071013012100175
) The ratio difference (%) and the angle difference (');
fIa、δIa-specific and angular differences (%) and (') of a-phase high-voltage current transformers;
fIc、δIc-specific and angular differences (%) and (') of the C-phase high-voltage current transformers;
fab、δab-specific and angular differences (%) of the AB phase voltage secondary circuit pressure drops;
fcb、δcb-specific and angular differences (%) of the CB phase voltage secondary circuit voltage drops;
(%) -ratio difference: percent;
(') -angular difference: the unit is minutes;
Figure C20071013012100176
respectively areAnd
Figure C20071013012100178
in the middle of the furnace, the gas-liquid separation chamber,and
Figure C200710130121001710
the phase angle between;
-AB phase voltage at the energy meter and CB phase voltage at the energy meter;
Figure C200710130121001712
-secondary current phasor.
For a three-phase four-wire system, the formula is:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ua</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>a</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ia</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>2</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ub</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>b</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ib</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C200710130121001715
Figure C200710130121001716
in the formula: epsilon- -the composite error of the high voltage electric energy metering device;
εW1、εW2、εW3-errors (%) of the first, second and third phase power meters;
fIa、δIa、fIb、δIb、fIc、δIc-specific differences (%) and angular differences (') of phase a, phase B, phase C current transformers;
fUa0、δUa0、fUb0、δUb0、fUc0、δUc0the specific difference (%) and the angular difference (') of the phase A, the phase B and the phase C voltage transformers;
fa0、δa0、δb0、δb0、fc0、δc0-specific and angular differences (%) and (') of the voltage drops of the A, B, C phase voltage secondary circuits, respectively;
P′1、P′2、P′3-the ac power electric energy values measured by the power electric energy meters of the respective phases;
Figure C20071013012100181
respectively are
Figure C20071013012100182
And
Figure C20071013012100183
in the middle of the furnace, the gas-liquid separation chamber,
Figure C20071013012100184
and
Figure C20071013012100185
in the middle of the furnace, the gas-liquid separation chamber,and
Figure C20071013012100187
the phase angle between;
Figure C20071013012100188
-a phase voltage at the electric energy meter, a phase voltage at the electric energy meter;
Figure C20071013012100189
-secondary current phasor.
Wherein the meaning of the precision, dedicated metering or detection instrument employed is: firstly, the metering error of the high-voltage potential transformer is monitored under the conditions of high voltage (such as over 10 KV) and strong current (large current), and the metering error of the high-voltage current transformer is monitored. And secondly, carrying out real-time online long-term monitoring on the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer under the conditions of high voltage and strong current, monitoring the voltage and current information of the secondary side of the high-voltage transformer, and monitoring the current amplitude and phase information of the primary side and the secondary side of the high-voltage current transformer. In other words, the measuring or detecting instrument with high precision and special purpose must have the performances of high voltage resistance, strong current (large current) resistance, real-time online long-term use, satisfactory precision degree, satisfactory safe operation and the like, so as to monitor the measuring error of the high-voltage transformer and the measuring error of the high-voltage current transformer. The real-time online detection method for the errors of the electric energy meter comprises the following steps: and (3) measuring or detecting the errors of the electric energy meter on line in real time by using a known electric energy measuring instrument. The real-time online detection method for the ratio difference and the angular difference of the secondary voltage drop of the voltage loop comprises the following steps: and (3) measuring or detecting the specific difference and the angular difference of the secondary pressure drop on line in real time by using a known specific difference and angular difference measuring instrument of the secondary pressure drop. These known methods need not be described in more detail.
According to the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device, the technical characteristics are as follows: the real-time online monitoring method for the metering error of the high-voltage transformer of the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is also characterized in that: one is monitoring implemented under the conditions of high voltage (such as more than 10 KV) and strong electricity, and the other is monitoring implemented under the conditions of high voltage and strong electricity on line in real time for a long time, a metering or detecting instrument with precision is adopted, the secondary side voltage value and the current value of the high voltage transformer are simultaneously metered or detected on the secondary side of the high voltage transformer on line in real time (the collected voltage value is at the root of the secondary side, and the current value can be detected at any position in front of the load of the secondary side), the ratio of the two values is the secondary load value of the high voltage transformer, then the metering error of the high voltage transformer is calculated according to a known strict mathematical formula, and the mathematical:
Figure C200710130121001810
Figure C200710130121001811
in the formula: f. ofU、δU-specific and angular differences of the measured high voltage transformers under actual operating loads;
f0、δ0-a measured dead-weight ratio difference and a measured dead-weight angle difference;
fH、δH-the specific and angular differences at rated load that have been measured beforehand;
IX-secondary current of the high voltage potential transformer under actual operating load;
IH-a secondary current at rated load that has been measured in advance;
Figure C20071013012100191
-the impedance angle of the actual operating load, i.e. the phase angle between the secondary voltage and the secondary current of the high voltage potential transformer;
Figure C20071013012100192
-an impedance angle at rated load that has been measured in advance;
(%) -calculated as a percentage;
(') -the unit of calculation is in minutes.
According to the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device, the technical characteristics are as follows: the real-time online monitoring method for the metering error of the high-voltage transformer is selected as follows: a. the real-time online monitoring method for the metering error of the high-voltage transformer comprises the following steps: a metering or detecting instrument with precision is adopted and arranged on the secondary side of the high-voltage transformer to simultaneously meter or detect the voltage value and the current value of the secondary side of the high-voltage transformer on line in real time, the voltage value is collected at the root of the secondary side, and the current value can be detected at any position in front of the secondary side load. b. At least one (or two) instrument for measuring or detecting voltage and current information with precision is adopted, or the sampled or detected voltage and current information is collected on the measuring or detecting instrument with precision in a wired transmission or wireless transmission/receiving mode in real time, without error or with negligible error through a detecting accessory (such as one instrument and the detecting accessory thereof simultaneously measure or detect the voltage and current information on a secondary side), and a calculating mechanism is arranged on the detecting instrument according to a mathematical formula:
Figure C20071013012100194
calculating to obtain a metering error value of the high-voltage transformer; or, the precision metering or detecting instrument transmits the sampled or detected voltage and current information to other computing mechanisms (such as a computer or a computing mechanism) in real time, in a wired transmission manner or a wireless transmission/receiving manner without error or with negligible error according to a mathematical formula:
Figure C20071013012100195
Figure C20071013012100196
and calculating to obtain a metering error value of the high-voltage transformer.
According to the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device, the technical characteristics are as follows: the real-time online monitoring method for the metering error of the high-voltage current transformer is characterized in that: the first is monitoring implemented under the condition of high voltage (such as over 10 KV) and strong electricity, the second is monitoring implemented under the condition of high voltage and strong electricity on line in real time for a long time, a special metering or detecting instrument is adopted to simultaneously meter or detect the current amplitude and phase information of the primary side and the secondary side of the high-voltage current transformer to be tested on line in real time, the current amplitude and phase information respectively metered or detected are collected to any one special metering or detecting instrument of two or two in a sampling and wired transmission or wireless sending/receiving mode, and the value is the metering error value of the high-voltage current transformer including the specific difference and the angular difference information.
According to the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device, the technical characteristics are as follows: the sampling, metering or detecting method for simultaneously metering or detecting the current amplitude and the phase of the primary side and the secondary side of the high-voltage current transformer to be detected in real time on line by the method for monitoring the metering error of the high-voltage current transformer in real time on line comprises the following steps: a. the primary side and the secondary side of the high-voltage current transformer to be measured adopt and are provided with special instruments for measuring or detecting current amplitude and phase values, for example, two instruments (one on each of the primary side and the secondary side) are used for simultaneously measuring or detecting the current amplitude and phase values of the mutual inductance of the primary side high voltage and the secondary side of the high-voltage current transformer on line in real time. b. The method comprises the steps of simultaneously measuring or detecting the current amplitude and the phase value of primary side high voltage and secondary side mutual inductance of the high-voltage current transformer on line in real time by adopting at least one special instrument for measuring or detecting the current amplitude and the phase value and a detection accessory thereof, and collecting the sampled or detected current amplitude and phase value information to the special measuring or detecting instrument thereof in a wired transmission or wireless transmission/receiving mode in real time without error or with negligible error through the detection accessory thereof so as to measure the measuring error of the high-voltage current transformer. Such as an instrument and its sensing accessories, meter or sense current magnitude and phase information on both the primary and secondary sides.
According to the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device, the technical characteristics are as follows: 1) the real-time online monitoring method for the metering error of the high-voltage transformer is selected as follows: a. the method for collecting the sampled or detected voltage and current information to the metering or detecting instrument with the accuracy in a real-time, error-free or error-negligible manner in a wired transmission mode is as follows: the measurement accessory and its cable of the precision measurement or measurement instrument have fixed known measurement error values and are subtracted to be error-free in the measurement, which requires that the measurement accessory be fixed and have fixed known measurement error values. The method for collecting the sampled or detected voltage and current information to the metering or detecting instrument with the accuracy in a wired transmission or wireless transmission/reception mode in real time without errors or with negligible errors comprises the following steps: the voltage and current information sampled or detected by the detecting accessory of the measuring or detecting instrument with the precision is digitally processed, and then is gathered on the measuring or detecting instrument with the precision or in a computing mechanism by a wired transmission or wireless transmission/receiving method without error or with negligible error. This is an advantage and benefit of digital transmission. 2) The real-time online monitoring method for the metering error of the high-voltage current transformer is selected as follows: the method for collecting the sampled or detected current amplitude value and phase value information to the special metering or detecting instrument in a wired transmission or wireless transmission/receiving mode in real time without error or with negligible error comprises the following steps: a. the method for collecting the sampled or detected current amplitude value and phase value information to the special metering or detecting instrument in real time without error or with negligible error in a wired transmission mode comprises the following steps: the measurement accessory and its cable of the dedicated measurement or measurement instrument used have fixed known measurement error values and are subtracted to be error-free in the measurement, which requires that the measurement accessory be fixed and have fixed known measurement error values. The method for collecting the sampled or detected information to the special metering or detecting instrument in real time, in a wired transmission or wireless transmission/reception mode without errors or with negligible errors comprises the following steps: the current amplitude and phase value information sampled or detected by the detection accessory of the special metering or detecting instrument is digitalized and then collected to the special metering or detecting instrument in a wired transmission or wireless transmission/receiving way without error or with negligible error. This is an advantage and benefit of digital transmission.
According to the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device, the technical characteristics are as follows: the selection scheme of the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is as follows: 1) the method for selecting the metering or detecting instrument with the precision adopted by the method for monitoring the metering error of the high-voltage transformer in real time on line comprises the following steps: the real-time online monitoring device for the metering error of the high-voltage transformer is designed and manufactured by adopting the real-time online monitoring method for the metering error of the high-voltage transformer, the main body part of the device comprises a mechanism and a structure for accurately metering or detecting voltage and current information, and the mechanism and the structure of the instrument for metering or detecting the voltage and current can be solved and designed by the existing known and public technical contents, which is not described in more detail. The device is characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The device is required to comprise or be provided with at least one or more (such as two or three, etc.) detection accessories capable of detecting voltage and current information in real time without error or with negligible error, wherein the detection accessories are detection terminals or/and extension sets: a. the device and/or the detection terminal and the cable thereof are/is provided with at least one measuring or detecting voltage and current information. The measurement is error-free or error-small to negligible, which requires the detection end and its cable to have a fixed structure and a fixed known detection error value and subtract it to be error-free or error-small to negligible. The device or/and the mechanism with at least one wired transmission or/and wireless transmission of the measured or detected voltage and current information, the mechanism is composed of electronic mechanisms, the mechanism is connected with the main body part of the device through a transmission wired cable or wirelessly transmits/receives, the mechanisms are split parts arranged outside the main body part of the device, and form an extension of the device, and the extension is composed of a shell and the electronic mechanisms inside the shell. The electronic mechanism is composed of various electronic components, devices, modules, parts, integrated circuit blocks, electronic circuits, software programs, and the like. c. The calculation mechanism for calculating the measurement error of the high-voltage transformer by the sampled or detected voltage and current information according to a mathematical formula is selected as follows: the calculating mechanism is set on the instrument for measuring or detecting voltage and current information with precision or on the real-time on-line monitoring device for measuring error of high-voltage potential transformer, and includes microcomputer or microprocessor, its software program and auxiliary circuit. Or with other computers, or computing mechanisms of a computing center. 2) The method for selecting the special metering or detecting instrument adopted by the method for monitoring the metering error of the high-voltage current transformer in real time on line is as follows: the main body of the device comprises a mechanism and a structure special for measuring or detecting the information of the current amplitude and the phase value, and the mechanism and the structure for measuring or detecting the information of the current amplitude and the phase value can be solved and designed by the existing known and public technical contents, which is not described in more detail. The device is characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The device is required to comprise or be provided with at least one or more (such as two or three, etc.) detection accessories capable of detecting the information of the current amplitude value and the current phase value in real time without error or with negligible error, wherein the detection accessories are a detection end or/and a branch machine: a. the device and/or the detection terminal and the cable thereof are/is provided with at least one piece of information for measuring or detecting the amplitude value and the phase value of the current. The measurement is error-free or error-small to negligible, which requires the detection end and its cable to have a fixed structure and a fixed known detection error value and subtract it to be error-free or error-small to negligible. The device or/and means for transmitting the information of the measured or detected current amplitude and phase values wirelessly, the means being constituted by electronic means, the means being connected to the main body of the device by means of a wired cable for transmission or wirelessly transmitted/received, the means being separate parts arranged outside the main body of the device, constituting an extension of the device, the extension being constituted by a housing and the electronic means therein. The electronic mechanism is composed of various electronic components, devices, modules, parts, integrated circuit blocks, electronic circuits, software programs, and the like.
According to the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device, the technical characteristics are as follows: the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device has the following selection schemes: the real-time online monitoring method for the metering error of the high-voltage transformer is adopted to design and manufacture the real-time online monitoring device for the metering error of the high-voltage transformer, the real-time online monitoring method for the metering error of the high-voltage current transformer is adopted to design and manufacture the real-time online monitoring device for the metering error of the high-voltage current transformer, and the two devices are integrated to form the real-time online monitoring equipment for the integrated error of the high-voltage electric energy metering device, and the equipment is characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The main body of the device comprises a mechanism and a structure for accurately measuring or detecting voltage and current information, a mechanism and a structure for specially measuring or detecting current amplitude value and phase value information, and a mechanism and a structure for measuring or detecting electric energy. The above mechanisms and structures for metering or detecting should be solved and designed by the existing known and commonly used technical content, which is not described in more detail. 1) The device must comprise or be provided with at least one detection accessory for detecting voltage and current information in real time, without or with negligible error, must comprise or be provided with at least one detection accessory for detecting current amplitude and phase values information in real time, without or with negligible error, and must comprise or be provided with at least one detection accessory for detecting power metering information in real time, without or with negligible error. Or the device must include or have at least one or more (such as two or three, etc.) comprehensive detection accessories which can detect the voltage and current information, the current amplitude and phase value information and the electric energy metering information in real time without error or with negligible error, wherein the detection accessories are all detection terminals or/and extension terminals: a. the device or/and at least one measuring or detecting end and cable with at least one measuring or detecting voltage and current information, or/and at least one measuring or detecting current amplitude value and phase value information, or/and at least one detecting end and cable with at least one detecting electric energy measuring information, or/and at least one or more (such as two or three) comprehensive detecting accessory and cable which are jointly formed by the measuring or detecting voltage and current information, or/and at least one detecting end and cable with at least one measuring or detecting electric energy measuring information. The measurement is error-free or error-small to negligible, which requires the detection end and its cable to have a fixed structure and a fixed known detection error value and subtract it to be error-free or error-small to negligible. The device or/and means with at least one wired transmission or/and wireless transmission of the measured or detected voltage and current information, or/and means with at least one wired transmission or/and wireless transmission of information of the measured or detected current amplitude and phase values, or/and at least one means for wired or/and wireless transmission of the detected energy metering information, or/and at least one means for integrated detection which is composed of them, these means are constituted by electronic means, which are connected to the main part of the device by means of wired cables for transmission or by means of wireless transmission/reception, the mechanisms are split parts arranged outside the main body part of the equipment, and form the sub-units of the equipment, and the sub-units consist of a shell and electronic mechanisms in the shell. The electronic mechanism is composed of various electronic components, devices, modules, parts, integrated circuit blocks, electronic circuits, software programs, and the like. 2) The structure of the device, either wired transmission or wireless transmission/reception with a computing center, is: the structure of the device or/and at least one computing center which is connected by wire transmission or wireless transmission/reception is as follows: a. the structure of the device and the connected mechanism for wire transmission of the detected voltage and current information, current amplitude value and phase value information and their comprehensive information between the computing center is as follows: the structure of the mechanism for the wired transmission of the detected voltage and current information, current amplitude value and phase value information and the comprehensive information of the information is formed by connecting a digital processing circuit, a wired transmission interface circuit and a transmission cable one by one; the specific structure of the mechanism for wirelessly transmitting/receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof between the device and the associated computing center is as follows: the structure of the mechanism for wirelessly transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof by the equipment is formed by connecting a digital processing circuit, a wireless interactive interface circuit and a transmitting antenna function thereof; the calculating center connected with the device is correspondingly provided with a mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof, and the receiving mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof is arranged in the calculating center and is formed by functionally connecting the voltage and current information, the current amplitude value and phase value information and the comprehensive information receiving antenna thereof and a wireless interactive interface circuit.
The main body of the device comprises the mechanism and the structure for accurately measuring or detecting voltage and current information, namely the real-time on-line monitoring part of the measuring error of the high-voltage potential transformer, the mechanism and the structure for specially measuring or detecting the information of the current amplitude and the phase value, namely the real-time on-line monitoring part of the measuring error of the high-voltage potential transformer, and the mechanism and the structure for measuring or detecting the electric energy, namely the real-time on-line monitoring part of the voltage drop of the secondary circuit of the high-voltage potential transformer, even the real-time on-line monitoring part of the measuring error of the electric energy meter. The equipment is characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. 1) The device must comprise or be provided with at least one detection accessory for detecting voltage and current information in real time, without error or with negligible error, must comprise or be provided with at least one detection accessory for detecting current amplitude and phase information in real time, without error or with negligible error, and must comprise or be provided with at least one detection accessory for detecting electric energy metering information in real time, without error or with negligible error; or the device must include or have at least one or more (such as two or three, etc.) integrated detection accessories which can detect the voltage and current information, the current amplitude and phase value information and the electric energy metering information in real time without error or with negligible error, wherein the detection accessories are all detection terminals or/and extension terminals: a. the device or/and at least one measuring terminal with at least one measuring or detecting voltage and current information, or/and at least one measuring or detecting current amplitude value and phase value information, or/and at least one measuring terminal with at least one measuring information for detecting electric energy and its cable, or/and at least one or more (such as two or three) integrated measuring accessories and their cables. The measurement is error-free or error-small to negligible, which requires the detection end and its cable to have a fixed structure and a fixed known detection error value and subtract it to be error-free or error-small to negligible. The device or/and means with at least one wired transmission or/and wireless transmission of the measured or detected voltage and current information, or/and means with at least one wired transmission or/and wireless transmission of information of the measured or detected current amplitude and phase values, or/and at least one means for wired or/and wireless transmission of the detected energy metering information, or/and at least one means for integrated detection which is composed of them, these means are constituted by electronic means, which are connected to the main part of the device by means of wired cables for transmission or by means of wireless transmission/reception, the mechanisms are split parts arranged outside the main body part of the equipment, and form the sub-units of the equipment, and the sub-units consist of a shell and electronic mechanisms in the shell. The electronic mechanism is composed of various electronic components, devices, modules, parts, integrated circuit blocks, electronic circuits, software programs, and the like. 2) The device may be provided with computing means comprising a microcomputer or microprocessor and its software programs and auxiliary circuits, and with structures and solutions that can be solved and designed with the known and common technical content of the prior art, not to mention a few. a. The device calculates the sampled or detected voltage and current information according to a mathematical formula and obtains a metering error value of the high-voltage transformer monitored on line in real time, wherein the mathematical formula is as follows:
Figure C20071013012100251
Figure C20071013012100252
in the formula: f. ofU、δU-specific and angular differences of the measured high voltage transformers under actual operating loads;
f0、δ0-a measured dead-weight ratio difference and a measured dead-weight angle difference;
fH、δH-the specific and angular differences at rated load that have been measured beforehand;
IX-secondary current of the high voltage potential transformer under actual operating load;
IH-a secondary current at rated load that has been measured in advance;
-the impedance angle of the actual operating load, i.e. the phase angle between the secondary voltage and the secondary current of the high voltage potential transformer;
Figure C20071013012100254
-an impedance angle at rated load that has been measured in advance;
(%) -calculated as a percentage;
(') -the unit of calculation is in minutes. b. The calculation mechanism adds all monitored errors in real time through a mathematical formula to calculate the comprehensive error of the high-voltage electric energy metering device, and for a three-phase three-wire system, the mathematical formula is as follows:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Uab</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>ab</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ia</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>3</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ucb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>cb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ic</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C20071013012100256
Figure C20071013012100257
in the formula: epsilon- -the composite error of the high voltage electric energy metering device;
εW1、εW3-relative error (%) of the first and third phase power meters;
P′1、P′3-the measured ac power (energy) values of the first and third phase power meters;
fUab、δUabAB phase voltage transformer (or secondary line voltage of voltage transformer)) The ratio difference (%) and the angle difference (');
fUcb、δUcbCB phase voltage transformers (or secondary line voltages of voltage transformers)
Figure C20071013012100262
) The ratio difference (%) and the angle difference (');
fIa、δIa-specific and angular differences (%) and (') of the a-phase current transformers;
fIc、δIc-specific and angular differences (%) and (') of the C-phase current transformers;
fab、δab-specific and angular differences (%) of the AB phase voltage secondary circuit pressure drops;
fcb、δcb-specific and angular differences (%) of the CB phase voltage secondary circuit voltage drops;
(%) -ratio difference: percent;
(') -angular difference: the unit is minutes;
Figure C20071013012100263
respectively are
Figure C20071013012100264
And
Figure C20071013012100265
in the middle of the furnace, the gas-liquid separation chamber,
Figure C20071013012100266
and
Figure C20071013012100267
the phase angle between;
-AB phase voltage at the energy meter and CB phase voltage at the energy meter;
Figure C20071013012100269
-secondary current phasor. For a three-phase four-wire system, the mathematical formula is:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ua</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>a</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ia</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>2</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ub</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>b</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ib</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C200710130121002611
Figure C200710130121002612
Figure C200710130121002613
in the formula: epsilon- -the composite error of the high voltage electric energy metering device;
εW1、εW2、εW3-errors (%) of the first, second and third phase power meters;
fIa、δIa、fIb、δIb、fIc、δIc-specific differences (%) and angular differences (') of phase a, phase B, phase C current transformers;
fUa0、δUa0、fUb0、δUb0、fUc0、δUc0the specific difference (%) and the angular difference (') of the phase A, the phase B and the phase C voltage transformers;
fa0、δa0、fb0、δb0、fc0、δc0-specific and angular differences (%) and (') of the voltage drops of the A, B, C phase voltage secondary circuits, respectively;
P′1、P′2、P′3-the ac power electric energy values measured by the power electric energy meters of the respective phases;
Figure C200710130121002614
respectively areAnd
Figure C200710130121002616
in the middle of the furnace, the gas-liquid separation chamber,
Figure C200710130121002617
and
Figure C200710130121002618
in the middle of the furnace, the gas-liquid separation chamber,
Figure C200710130121002619
and
Figure C200710130121002620
the phase angle between;
Figure C200710130121002621
-a phase voltage at the electric energy meter, a phase voltage at the electric energy meter;
Figure C20071013012100271
-secondary current phasor. Wherein the precise, dedicated metering or detecting instrument used means: firstly, the metering error of the high-voltage potential transformer is monitored under the conditions of high voltage (such as over 10 KV) and strong current (large current), and the metering error of the high-voltage current transformer is monitored. And secondly, carrying out real-time online long-term monitoring on the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer under the conditions of high voltage and strong current, monitoring the voltage and current information of the secondary side of the high-voltage transformer, and monitoring the current amplitude and phase information of the primary side and the secondary side of the high-voltage current transformer. In other words, the measuring or detecting instrument with high precision and special purpose must have the performances of high voltage resistance, strong current (large current) resistance, real-time online long-term use, satisfactory precision degree, satisfactory safe operation and the like, so as to monitor the measuring error of the high-voltage transformer and the measuring error of the high-voltage current transformer. The real-time online detection method for the errors of the electric energy meter comprises the following steps: using a known electric energy metering instrument to meter or detect errors of the electric energy meter on line in real time; the real-time online detection method for the ratio difference and the angular difference of the secondary voltage drop of the voltage loop comprises the following steps: and (3) measuring or detecting the specific difference and the angular difference of the secondary pressure drop on line in real time by using a known specific difference and angular difference measuring instrument of the secondary pressure drop.
According to the real-time online monitoring equipment of high-voltage electric energy metering device composite error, technical characteristics still have: the detailed structure of the high-voltage electric energy metering error real-time on-line monitoring equipment of the equipment comprises: a. the device or/and at least one detection end for detecting voltage and current information of the belt or/and at least one detection end for detecting current amplitude value and phase value information of the belt or/and at least one comprehensive detection end composed of the devices or/and the belt or/and the comprehensive detection end composed of the devices or/and the belt and the comprehensive detection: the cable is connected with the detection input end of the device and the voltage and current sampling detection end at the end part of the cable; the cable is connected with the detection input end of the device, and the current amplitude value and phase value sampling detection end of the end part of the cable; a cable connected to the device detection input and a comprehensive detection end of its end. The sampling detection end is the connecting end of the secondary side line of the direct and three-phase high-voltage transformer and the primary side line and the secondary side line of the high-voltage current transformer. b. The device or/and at least one split or branch mechanism with wired transmission of detected voltage and current information, or/and at least one split or branch mechanism with wired transmission of detected current amplitude and phase value information, or/and at least one split or branch mechanism with wired transmission of detected comprehensive including voltage and current information, current amplitude and phase value information. The specific structure of the current amplitude and phase value information mechanism for wired transmission detection between the extension and the equipment, the voltage and current information mechanism for wired transmission detection between the extension and the equipment, and the comprehensive mechanism for wired transmission detection between the extension and the equipment, the current amplitude and phase value information is as follows: voltage and current information, current amplitude and phase value information, and their comprehensive information sampling circuit-controller controlled A/D conversion circuit-transmission circuit and transmission cable-interface circuit and connector-input circuit are functionally connected. The sampling component of the sampling circuit can be arranged at the sampling position of the voltage and current information of the secondary side of the tested high-voltage transformer, the current amplitude and the phase value information of the primary side and the secondary side of the high-voltage current transformer, and the sampling component is directly connected with the secondary side line of the three-phase high-voltage transformer and the connecting end of the primary side and the secondary side line of the high-voltage current transformer. Before the movable connector of interface circuit, the cable transmission extension set of said equipment is formed, its movable connector is the input and output mechanism connecting end of said cable transmission extension set, and its fixed connector is formed into the input circuit of voltage and current information, current amplitude value and phase value information of said equipment and their comprehensive information. c. The device or/and at least one split or branch mechanism for wirelessly transmitting detected voltage and current information of the device or/and the belt, or/and at least one split or branch mechanism for wirelessly transmitting detected current amplitude and phase value information of the belt, or/and at least one split or branch mechanism for wirelessly transmitting detected comprehensive voltage and current information, current amplitude and phase value information of the belt. The detailed structure of the voltage and current information mechanism for wireless transmission/reception detection between the extension set and the equipment, the current amplitude and phase value information mechanism for wireless transmission/reception detection between the extension set and the equipment, and the comprehensive mechanism for wireless transmission/reception detection between the extension set and the equipment, which comprises the voltage and current information, the current amplitude and phase value information, is as follows: the voltage and current information, the current amplitude value and phase value information, and the comprehensive information sampling circuit, the controller-controlled A/D conversion circuit, the transmitting circuit and the transmitting antenna function are connected to form a wireless transmitting and detecting extension set comprising the voltage and current information, the current amplitude value and phase value information, and the comprehensive information. The sampling component of the sampling circuit can be arranged at the sampling position of the voltage and current information of the secondary side of the tested high-voltage transformer, the current amplitude and the phase value information of the primary side and the secondary side of the high-voltage current transformer, and the sampling component is directly connected with the secondary side line of the three-phase high-voltage transformer and the connecting end of the primary side and the secondary side line of the high-voltage current transformer. The device is also provided with a mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof, wherein the mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof is arranged on the main body part of the device and is formed by functionally connecting a receiving circuit of the voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof, a receiving antenna thereof, an amplifying circuit and an input circuit, and the input circuit is the input circuit of the voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof of the device. d. The structure of the device, wired transmission or wireless transmission/reception with a computing center is as follows: the structure of the device or/and at least one computing center which is connected by wire transmission or wireless transmission/reception is as follows: i. the structure of the device and the connected mechanism for wire transmission of the detected voltage and current information, current amplitude value and phase value information and their comprehensive information between the computing center is as follows: the structure of the mechanism for the wired transmission of the detected voltage and current information, current amplitude value and phase value information and the comprehensive information of the information is formed by connecting a digital processing circuit, a wired transmission interface circuit and a transmission cable one by one; the specific structure of the mechanism for wirelessly transmitting/receiving the detected voltage and current information, current amplitude and phase value information, and their integrated information between the device and the associated computing center is: the structure of the mechanism for wirelessly transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof by the equipment is formed by connecting a digital processing circuit, a wireless interactive interface circuit and a transmitting antenna function thereof; the calculating center connected with the device is correspondingly provided with a mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof, and the receiving mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof is arranged in the calculating center and is formed by functionally connecting the voltage and current information, the current amplitude value and phase value information, the comprehensive information receiving antenna thereof and a wireless interactive interface circuit. The device is not excluded from the structure that the device is provided with a detection end for detecting the voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof, an extension set for wire-transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof, and a plurality of (such as one for each of the three) extension sets for wirelessly transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof. Nor does it exclude that the device is also in wired and/or wireless contact with other computing institutions (e.g. computing centres, etc.) at the same time.
According to the real-time online monitoring equipment of high-voltage electric energy metering device composite error, technical characteristics still have: the detailed structure of the high-voltage electric energy metering error real-time on-line monitoring equipment of the equipment comprises: 1) the device or/and at least one detection end for detecting voltage and current information of the belt or/and at least one detection end for detecting current amplitude value and phase value information of the belt or/and at least one comprehensive detection end composed of the devices or/and the belt or/and the comprehensive detection end are/is characterized in that the detailed structure is as follows: the detection cable of the detection end and the sampling detection end are provided with fixed structures. If the length of the cable is fixed, the detection end is fixed, the electrical structural parameters are fixed, and the detection error caused by the detection end when detecting the voltage and current information and the detection error caused by the detection end when detecting the current amplitude value and phase value information are fixed and known, the detection errors can be deducted during detection, and the errors are free from errors or can be neglected in measurement. 2) The device and/or at least one separate or subset means with wired transmission of detected voltage and current information, or/and at least one separate or subset means with wired transmission of detected current magnitude and phase value information, or/and at least one separate or subset means with wired transmission of detected integrated voltage and current information, current magnitude and phase value information. The detailed structure of the mechanism for wire transmission of detected voltage and current information between the extension and the equipment, the mechanism for wire transmission of detected current amplitude and phase value information between the extension and the equipment, and the comprehensive mechanism for wire transmission of detected voltage and current information, current amplitude and phase value information between the extension and the equipment is as follows: a. the structure of the mechanism for wired transmission of detected voltage and current information is formed by connecting a sampling circuit, an analog/digital conversion circuit controlled by a controller, a photoelectric isolation circuit, a differential output circuit, a transmission circuit, a differential input circuit, a photoelectric isolation circuit and an input circuit one by one. Or b, the structure of the mechanism for wired transmission of the detected voltage and current information, current amplitude and phase value information and the comprehensive information thereof is formed by connecting a sampling circuit, an analog-to-digital conversion circuit controlled by a controller, an electro-optical conversion interface circuit, a transmission optical fiber, a photoelectric conversion interface circuit, an amplifying circuit and an input circuit one by one. The configurations described in points a and b above all have a digitizing mechanism and then wired together with no or negligible error to collect the sensed voltage, current information and current magnitude and phase information onto the device. Or, the structure of the mechanism for wired transmission of the detected voltage and current information, current amplitude and phase value information, and their comprehensive information is formed by connecting a digital sampling circuit, a digital amplifying circuit (a), an electro-optical conversion interface circuit, a transmission optical fiber, an electro-optical conversion interface circuit, a digital amplifying circuit (b), and a digital input circuit one by one. Or d, the structure of the mechanism for the wired transmission of the detected voltage and current information is formed by a digital output end, a wired transmission cable and a digital input end. The digital transmission structure described in points c and d above collects the detected voltage and current information, current amplitude and phase value information directly to the device without error or with error as small as negligibly using wired transmission. The circuits described in a, b, c and d above can be designed and manufactured by using the existing known and commonly used technical contents and the known and commonly used electronic circuit parts, as long as the circuits can complete or realize the functions of the circuits. 3) The device and/or at least one separate or sub-unit means of the belt for wirelessly transmitting the detected voltage and current information, or/and at least one separate or sub-unit means of the belt for wirelessly transmitting the detected current magnitude and phase value information, or/and at least one separate or sub-unit means of the belt for wirelessly transmitting the detected voltage and current information, current magnitude and phase value information. The detailed structure of the mechanism for wirelessly transmitting/receiving the detected voltage and current information between the slave unit and the device, the mechanism for wirelessly transmitting/receiving the detected current amplitude and phase value information between the slave unit and the device, and the comprehensive mechanism for wirelessly transmitting/receiving the detected voltage and current information and current amplitude and phase value information between the slave unit and the device is as follows: a. the extension set for wirelessly transmitting detected voltage and current information, current amplitude value and phase value information and comprehensive information of the information is structurally composed of a sampling circuit, an analog/digital conversion circuit controlled by a controller, a digital processing module, a wireless data transmission communication module and a transmitting antenna of the wireless data transmission communication module in functional connection; the corresponding equipment is provided with a mechanism and a structure for wirelessly receiving detected voltage and current information, current amplitude and phase value information, and the mechanism and the structure are formed by functionally connecting a wireless data transmission communication module and a receiving antenna thereof, a digital processing module and an input circuit. Or b, the structure of the extension set for wirelessly transmitting the detected voltage and current information, current amplitude value and phase value information and the comprehensive information of the information is formed by connecting a sampling circuit, an analog-digital conversion circuit controlled by a controller, a digital modulation circuit, a frequency conversion transmitting circuit and a transmitting antenna function thereof; the corresponding equipment is provided with a mechanism and a structure for wirelessly receiving detected voltage and current information, current amplitude and phase value information, and the mechanism and the structure are formed by functionally connecting a receiving and frequency conversion circuit, a receiving antenna thereof, a digital demodulation circuit and an input circuit. The configurations described above in both points a and b have a digitizing mechanism and then wirelessly transmit the sensed voltage and current information, current magnitude and phase value information to the device with no or negligible error. Or c, the extension set for wirelessly transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information of the information is structurally formed by connecting a digital sampling circuit, a digital amplifying circuit and a transmitting antenna thereof; the corresponding equipment is provided with a mechanism and a structure for wirelessly receiving detected voltage and current information, current amplitude and phase value information, and the mechanism and the structure are formed by functionally connecting a digital receiving amplifying circuit, a receiving antenna thereof and a digital input circuit. The digitization structure described in point c collects the detected voltage and current information, current amplitude and phase value information directly to the device without error or with error as little as negligibly in a wireless transmission/reception manner. The circuits described in a, b and c above can be designed and manufactured by using the existing known and commonly used technical contents and the known and commonly used electronic circuit parts, as long as the circuits can complete or realize the functions of the circuits.
The real-time online monitoring method and the monitoring equipment for the comprehensive errors of the high-voltage electric energy metering device have the following advantages: firstly, the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is characterized in that: 1. the method is implemented under the conditions of high voltage (such as more than 10 KV) and strong current, and expands the detection method to the technical field of high-voltage electric energy metering or detection, the electric energy metering of the high voltage and the strong current undoubtedly provides comprehensive and more serious challenges for the electric energy metering technology, and the high-voltage metering technology is required to be comprehensively improved to the level of the requirements of high voltage, strong current specification, safety and the like; 2. the method is a monitoring method which is implemented in real time on line under the conditions of high voltage and strong electricity for a long time, and is implemented in real time on line under the conditions of high voltage and strong electricity for a long time, so that the method can be said to be the highest requirement and level of a high-voltage electric energy metering or detecting technology and the most difficult requirement and level of the high-voltage electric energy metering or detecting technology; 3. the real-time on-line long-term monitoring method implemented under the conditions of high voltage (such as over 10 KV) and strong electricity is an independent innovation and technical leap of a high-voltage electric energy metering or detecting technology under the conditions of high voltage and strong electricity, and makes a contribution to the metering or detecting level and improvement of the high-voltage electric energy in China. Secondly, the real-time on-line monitoring equipment for the comprehensive error of the high-voltage electric energy metering device has the advantages, provides a brand-new accurate means for detecting the comprehensive error of the high-voltage electric energy metering device for both power supply and power utilization sides, is convenient and quick, can be used for a long time, and contributes to the scientific and technological progress of the electric power industry. Is worthy of being popularized and used in the field of electric power systems and electric power industry detection.
Description of the drawings
The invention description figures are 15 in total:
FIG. 1 is a schematic diagram of a real-time online monitoring method for comprehensive errors of a high-voltage electric energy metering device;
FIG. 2 is a schematic structural diagram of a method and an apparatus for real-time on-line monitoring of metering errors of a high-voltage transformer;
FIG. 3 is a schematic structural diagram of a real-time online monitoring method and device for metering errors of a high-voltage current transformer;
FIG. 4 is a schematic diagram of a high-voltage potential transformer metering error real-time on-line monitoring device adopting a wired transmission mechanism and a structure of an error-free detection end;
FIG. 5 is a schematic diagram of a high-voltage potential transformer metering error real-time on-line monitoring device adopting an error-free wired transmission extension and a structure;
FIG. 6 is a schematic diagram of a high-voltage potential transformer metering error real-time on-line monitoring device adopting an error-free wireless transmitting/receiving extension and a structure;
FIG. 7 is a schematic diagram of a high-voltage current transformer metering error real-time on-line monitoring device employing a wired transmission mechanism and structure with no error at the detection end;
FIG. 8 is a schematic diagram of a high-voltage current transformer metering error real-time on-line monitoring device employing an error-free wired transmission extension and a structure;
FIG. 9 is a schematic diagram of a high-voltage current transformer metering error real-time on-line monitoring device employing an error-free wireless transmitting/receiving extension and a structure;
FIG. 10 is a schematic diagram of an extension and structure of an error-free wired transmission high-voltage electric energy metering information (of voltage and current metering information) of a high-voltage electric energy metering device comprehensive error real-time online monitoring device;
FIG. 11 is a schematic diagram of the extension and structure of an error-free wired transmission high-voltage electric energy metering information (of current amplitude and phase values) of the high-voltage electric energy metering device comprehensive error real-time on-line monitoring device;
FIG. 12 is a schematic diagram of an extension and a structure of an error-free wireless transmitting/receiving device for integrated error real-time online monitoring of a high-voltage electric energy metering device;
FIG. 13 is a schematic diagram of another error-free extension and structure of an error-free wireless transmitting/receiving high-voltage electric energy metering information of the high-voltage electric energy metering device comprehensive error real-time on-line monitoring device;
FIG. 14 is a schematic diagram of the mechanism and structure of the high-voltage electric energy metering device for real-time online monitoring of the comprehensive error of the device and the computer or the computer center for wired transmission of the voltage and current metering information;
fig. 15 is a schematic diagram of a mechanism and a structure of a high-voltage electric energy metering device for wirelessly transmitting/receiving voltage and current metering information between a real-time online comprehensive error monitoring device and a computer or a computing center.
The use of the same reference symbols in different drawings indicates identical items being referred to by the same reference symbols in the various drawings. In each figure: 1. a high voltage potential transformer; 2. a high-voltage current transformer; 3. a voltage three-phase secondary line input end; 4. a current three-phase secondary line input end; 5. wirelessly transmitting the monitored information of the high-voltage current transformer; 6. the information of the monitored high-voltage current transformer is transmitted in a wired mode; 7. a three-phase high voltage power line; 8. the high-voltage current transformer monitors the extension; 9. a high-voltage current transformer monitoring host; 10. indicating a boundary between an outdoor site and a user control room; 11. a current three-phase secondary cable; 12. a sampling end is arranged at the input end of the current three-phase secondary line user electric energy meter; 13. a voltage three-phase secondary cable; 14. the input end of the voltage three-phase secondary line user electric energy meter is provided with a sampling end; 15. a user electric energy meter; 16. a voltage drop electric energy metering error real-time online monitoring host of a secondary circuit of the high-voltage transformer; 17. a detection accessory (a detection end or/and an extension set) for sampling and wired transmission or wireless transmission of voltage information; 18. a sampling end at the initial end part of the voltage three-phase secondary line; 19. indicating wired transmission voltage metering information; 20. indicating wireless transmission voltage metering information; 21. a high-voltage transformer monitoring extension; 22. a high-voltage transformer monitoring host; 23. indicating wired transmission voltage and current metering information; 24. indicating wireless transmission of voltage and current metering information; 25. a computer or computing center; 26. the indicating device and the calculating mechanism transmit voltage and current metering information through wires; 27. wirelessly transmitting and receiving voltage and current metering information between the indicating device and the calculating mechanism; 28. indicating sampled voltage and current information; 29. a controller, such as a microprocessor or a single chip microcomputer; 30. an analog/digital conversion circuit; 31. a photoelectric isolation circuit (out); 32. a differential amplification output circuit; 33. a differential amplification input circuit; 34. a photoelectric isolation circuit (in); 35. indicating the sampling current information; 36. an electro-optical conversion interface circuit; 37. a transmission optical fiber; 38. a photoelectric conversion interface circuit; 39. an amplification input circuit; 40. indicating sampling detection information; 41. a digital processing module (a); 42. an interface circuit (a); 43. a wireless data transmission communication module (a); 44. a wireless data transmission communication module (b); 45. an interface circuit (b); 46. a digital processing module (b); 47. a digital modulation circuit; 48. a frequency conversion circuit; 49. an amplifying transmission circuit; 50. a receiving and frequency conversion circuit; 51. a digital demodulation circuit; 52. indicating the input of sampling detection information; 53. a digital processing circuit; RS232 interface circuit; 55. a wireless ethernet interface.
Detailed description of the preferred embodiments
Non-limiting examples of the invention are as follows:
embodiment I, real-time online monitoring method and monitoring equipment for comprehensive errors of high-voltage electric energy metering device
The content of the embodiment comprises two parts, namely a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device and a real-time online monitoring device for the comprehensive error of the high-voltage electric energy metering device.
Real-time online monitoring method for comprehensive errors of high-voltage electric energy metering device
The method for monitoring the comprehensive error of the high-voltage electric energy metering device in real time on line is a method for monitoring the comprehensive error of the high-voltage electric energy metering device in real time on line, truly and accurately for a long time, and is technically characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is as shown in the attached figure 1 in the specification: the comprehensive errors of the tested high-voltage electric energy metering device are simultaneously measured or detected in real time on line by adopting precise and special measuring or detecting instruments 8, 9, 15, 16, 17, 21, 22 and the like, and the errors comprise: the metering error of the high-voltage potential transformer (measured or detected by instruments 21 and 22), the metering error of the high-voltage current transformer (measured or detected by instruments 8 and 9), the voltage drop of a secondary circuit of the high-voltage potential transformer (measured or detected by instruments 16 and 17), and the metering error of the electric energy meter 15 (measured or detected by the instrument 16) are added in real time through a formula, namely the comprehensive error of the high-voltage electric energy metering device, and for a three-phase three-wire system, the formula is as follows:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Uab</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>ab</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ia</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>3</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ucb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>cb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ic</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C20071013012100342
in the formula: epsilon- -the composite error of the high voltage electric energy metering device;
εW1、εW3-relative error (%) of the first and third phase power meters;
P′1、P′3-the measured ac power (energy) values of the first and third phase power meters;
fUab、δUabAB-phase high-voltage potential transformer (or secondary line voltage of high-voltage potential transformer)
Figure C20071013012100344
) The ratio difference (%) and the angle difference (');
fUcb、δUcb-CB phase high voltage transformer (or secondary line voltage of high voltage transformer)
Figure C20071013012100345
) The ratio difference (%) and the angle difference (');
fIa、δIa-specific and angular differences (%) and (') of a-phase high-voltage current transformers;
fIc、δIc-specific and angular differences (%) and (') of the C-phase high-voltage current transformers;
fab、δab-specific and angular differences (%) of the AB phase voltage secondary circuit pressure drops;
fcb、δcb-specific and angular differences (%) of the CB phase voltage secondary circuit voltage drops;
(%) -ratio difference: percent;
(') -angular difference: the unit is minutes;
respectively areAnd
Figure C20071013012100348
in the middle of the furnace, the gas-liquid separation chamber,
Figure C20071013012100349
and
Figure C200710130121003410
the phase angle between;
Figure C200710130121003411
-AB phase voltage at the energy meter and CB phase voltage at the energy meter;
Figure C200710130121003412
-secondary current phasor. For a three-phase four-wire system, the formula is:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ua</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>a</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ia</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>2</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ub</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>b</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ib</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C200710130121003414
Figure C200710130121003415
Figure C200710130121003416
in the formula: epsilon- -the composite error of the local electrical energy metering device;
εW1、εW2、εW3-errors (%) of the first, second and third phase power meters;
fIa、δIa、fIb、δIb、fIc、δIc-specific differences (%) and angular differences (') of phase a, phase B, phase C current transformers;
fUa0、δUa0、fUb0、δUb0、fUc0、δUc0the specific difference (%) and the angular difference (') of the phase A, the phase B and the phase C voltage transformers;
fa0、δa0、fb0、δb0、fc0、δc0-specific and angular differences (%) and (') of the voltage drops of the A, B, C phase voltage secondary circuits, respectively;
P′1、P′2、P′3-the ac power electric energy values measured by the power electric energy meters of the respective phases;
Figure C20071013012100351
respectively are
Figure C20071013012100352
And
Figure C20071013012100353
in the middle of the furnace, the gas-liquid separation chamber,
Figure C20071013012100354
andin the middle of the furnace, the gas-liquid separation chamber,
Figure C20071013012100356
and
Figure C20071013012100357
the phase angle between;
Figure C20071013012100358
-a phase voltage at the electric energy meter, a phase voltage at the electric energy meter;
Figure C20071013012100359
-secondary current phasor. Wherein the precise, dedicated measuring or detecting instrument (8, 9, 15, 16, 17, 21, 22) is used in the sense that: firstly, monitoring the metering error of the high-voltage potential transformer under the conditions of high voltage (such as more than 10 KV) and strong current (large current), and monitoring the secondary side voltage and current information of the high-voltage current transformer; and monitoring the metering error of the high-voltage current transformer, and monitoring the current amplitude and phase information of the primary side and the secondary side of the high-voltage current transformer. Secondly, real-time online long-term monitoring is carried out on the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer under the conditions of high voltage and strong current. In other words, the precision-adapted, dedicated measuring or detecting instruments 8, 9, 16, 17, 21, 22 must have high voltage resistance, high current resistance, real-time online long-term use, satisfactory precision, and satisfactory safe operationAnd the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer can be monitored only by solving the equal performance. The real-time online detection method for the error of the electric energy meter 15 comprises the following steps: the errors of the electric energy meter are measured or detected on line in real time by using a known electric energy measuring instrument (such as the instrument 16). The real-time online detection method for the ratio difference and the angular difference of the secondary voltage drop of the voltage loop comprises the following steps: and (3) measuring or detecting the specific difference and the angular difference of the secondary pressure drop on line in real time by using a known specific difference and angular difference measuring instrument of the secondary pressure drop. These known methods need not be described in more detail, but it is pointed out that: these measurements or measurements are performed at high voltages (e.g., above 10 KV) and under high currents (high currents). According to the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device, the real-time online monitoring method for the metering error of the high-voltage transformer is characterized in that the monitoring is implemented under the conditions of high voltage (such as more than 10 KV) and strong electricity, the monitoring is implemented under the conditions of high voltage and strong electricity for a long time in real time on line, the metering or detecting instruments 21 and 22 with precision are adopted, the voltage value and the current value are simultaneously metered or detected on the secondary side of the high-voltage transformer 1 in real time on line, the collected voltage value is at the root of the secondary side (4 of figure 1), and the current value can be detected at any position in front. The ratio of the detected secondary side voltage value and the detected current value is the secondary load value of the high-voltage transformer 1, and then the metering error of the high-voltage transformer is calculated according to a known strict mathematical formula, wherein the mathematical formula is as follows:
Figure C200710130121003510
Figure C200710130121003511
in the formula: f. ofU、δU-specific and angular differences of the measured high voltage transformers under actual operating loads;
f0、δ0-a measured dead-weight ratio difference and a measured dead-weight angle difference;
fH、δH-the specific and angular differences at rated load that have been measured beforehand;
IX-secondary current of the high voltage potential transformer under actual operating load;
IH-a secondary current at rated load that has been measured in advance;
-the impedance angle of the actual operating load, i.e. the phase angle between the secondary voltage and the secondary current of the high voltage potential transformer;
Figure C20071013012100362
-an impedance angle at rated load that has been measured in advance;
(%) -calculated as a percentage;
(') -the unit of calculation is in minutes. According to the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device, the real-time online monitoring method for the metering error of the high-voltage current transformer is also characterized in that the monitoring is implemented under the conditions of high voltage (such as more than 10 KV) and strong current, the monitoring is carried out under the conditions of high voltage and strong electricity on line in real time for a long time, the current amplitude and phase information of the primary side (7 of figure 1) and the secondary side (4 of figure 1) of the high-voltage current transformer 2 to be measured is simultaneously measured or detected on line in real time by adopting special measuring or detecting instruments 8 and 9, the respectively measured or detected current amplitude and phase information is collected to any one special measuring or detecting instrument (such as the instrument 9) of two or two in a sampling and wired transmission or wireless transmission/receiving way, the difference of the values is the metering error value of the high-voltage current transformer which comprises the information of the specific difference and the angular difference. In fig. 1: 10 illustrates the outdoor site and the user control room boundary.
(II) real-time online monitoring equipment for comprehensive error of high-voltage electric energy metering device
The real-time online monitoring equipment for the comprehensive error of the high-voltage electric energy metering device is designed and manufactured according to a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device. The main body of the device is shown in the combination of fig. 1-3, and comprises: the mechanism and structure for accurately measuring or detecting voltage and current information, i.e. the real-time online monitoring part (1, 3, 21, 22, etc. in fig. 2) for measuring error of the high-voltage transformer shown in fig. 2, the mechanism and structure for specially measuring or detecting current amplitude and phase value information, i.e. the real-time online monitoring part (2, 4, 7 to 9, etc. in fig. 3) for measuring error of the high-voltage current transformer shown in fig. 3, and the mechanism and structure for measuring or detecting electric energy, i.e. the real-time online monitoring part (1 to 4, 11 to 14, 16 to 18, etc. in fig. 1) for measuring error of the secondary circuit voltage drop of the high-voltage transformer shown in fig. 1, and even the real-time online monitoring part (16, etc. in fig. 1) for measuring error of the electric energy meter (15, etc. in fig. 1), which mechanisms and structures should be used by the above measuring or detecting parts can be solved and designed by the existing and, this will not be described in more detail. The precise, dedicated metering or detection instrument used is meant to be: firstly, the metering error of a high-voltage potential transformer is monitored under the conditions of high voltage (such as over 10 KV) and strong current (large current), and the metering error of the high-voltage current transformer is monitored; and secondly, carrying out real-time online long-term monitoring on the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer under the conditions of high voltage and strong current, monitoring the voltage and current information of the secondary side of the high-voltage transformer, and monitoring the current amplitude and phase information of the primary side and the secondary side of the high-voltage current transformer. In other words, the measuring or detecting instrument with high precision and special purpose must have the performances of high voltage resistance, strong current (large current) resistance, real-time online long-term use, satisfactory precision degree, satisfactory safe operation and the like, so as to monitor the measuring error of the high-voltage transformer and the measuring error of the high-voltage current transformer. The equipment is characterized in that: 1) the device must comprise or be provided with at least one detection accessory for detecting voltage and current information in real time, without error or with negligible error, must comprise or be provided with at least one detection accessory for detecting current amplitude and phase information in real time, without error or with negligible error, and must comprise or be provided with at least one detection accessory for detecting electric energy metering information in real time, without error or with negligible error; or the device must include or be provided with at least one or more (such as two) comprehensive detection accessories which are formed by detection accessories capable of detecting voltage and current information, current amplitude and phase value information and electric energy metering information in real time without errors or with negligible errors, wherein the detection accessories are detection terminals or/and extension sets: a. the device is provided with at least one measuring end and a cable thereof for measuring or detecting voltage and current information, at least one measuring end and a cable thereof for measuring or detecting current amplitude value and phase value information, at least one or more (such as two) comprehensive measuring ends and cables thereof which are jointly formed by the measuring ends and the cable thereof, and at least one detecting accessory (measuring end) in total, namely 8, 17, 21 and the like in figures 1-3. To make these detectors error free or negligibly small in metrology requires that the detectors and their cables have a fixed structure and a fixed known detection error value and be subtracted out to be error free or negligibly small. b. The device is provided with at least one mechanism for transmitting the measured or detected voltage and current information in a wired transmission or/and wireless mode, at least one mechanism for transmitting the measured or detected current amplitude value and phase value information in a wired transmission or/and wireless mode, at least one mechanism for transmitting the detected electric energy measuring information in a wired transmission or/and wireless mode, at least one comprehensive detection mechanism formed by the mechanisms, at least one detection mechanism with four wired transmissions in total, and at least one detection mechanism with four wireless transmissions/receptions in total, such as 8, 17, 21 and the like in figures 1-3. These mechanisms are each constituted by electronic mechanisms, which are connected to the main body of the apparatus by means of wired cables for transmission or by means of wireless transmission/reception, are separate parts arranged outside the main body of the apparatus, constituting the extensions of the apparatus, which extensions are constituted by a housing and the electronic mechanisms inside. The electronic mechanism is composed of various electronic components, devices, modules, parts, integrated circuit blocks, electronic circuits, software programs, and the like. The at least one detection mechanism with four wired transmission lines is a wired transmission detection extension set, and the wired transmission detection extension sets have the following structures: voltage and current information, current amplitude and phase value information, and their comprehensive information sampling circuit-controller controlled A/D conversion circuit-transmission circuit and transmission cable-interface circuit and connector-input circuit are functionally connected. The sampling component of the sampling circuit can be arranged at the sampling part of the voltage and current information of the secondary side of the high-voltage transformer to be tested, the current amplitude and phase value information of the primary side and the secondary side of the high-voltage current transformer, the sampling component is directly connected with the secondary side line of the three-phase high-voltage transformer and the connecting end of the primary side and the secondary side line of the high-voltage current transformer, the sampling precision is high, or the current sampling can be carried out by adopting a pincer-shaped current transformer and the like. Before the movable connector of interface circuit, the cable transmission extension set of said equipment is formed, its movable connector is the input and output mechanism connecting end of said cable transmission extension set, and its fixed connector is formed into the input circuit of voltage and current information, current amplitude value and phase value information of said equipment and their comprehensive information. The detailed structure of the wired transmission detection extension is formed by connecting a sampling circuit, an analog/digital conversion circuit controlled by a controller, an electro-optical conversion interface circuit, a transmission optical fiber, an electro-optical conversion interface circuit, an amplifying circuit and an input circuit one by one. The configurations described in this example all have a digitizing mechanism and then wired together with no or negligible error to collect the sensed voltage and current information, current magnitude and phase value information onto the device. The above-mentioned at least one detecting means for wireless transmission/reception is a detecting slave set for wireless transmission/reception, a means for wirelessly transmitting/receiving information on the amplitude and phase of the detected current between the slave set and the device, a means for wirelessly transmitting/receiving information on the detected voltage and current between the slave set and the device, and an integrating means for wirelessly transmitting/receiving information on the detected voltage and current, and information on the amplitude and phase of the current between the slave set and the device have the following detailed configurations: the voltage and current information, the current amplitude value and phase value information, and the comprehensive information sampling circuit, the controller-controlled A/D conversion circuit, the transmitting circuit and the transmitting antenna function are connected to constitute the extension set for wirelessly transmitting the detected voltage and current information, current amplitude value and phase value information, and the comprehensive information. The device is also provided with a mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof, wherein the mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof is arranged on the main body part of the device and is formed by functionally connecting a receiving circuit of the voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof, a receiving antenna thereof, an amplifying circuit and an input circuit, and the input circuit is the input circuit of the voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof of the device. The detailed structure of the extension for wirelessly transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof is formed by connecting a sampling circuit, an analog/digital conversion circuit controlled by a controller, a digital processing module, a wireless data transmission communication module and a transmitting antenna function thereof; the corresponding equipment is provided with a mechanism and a structure for wirelessly receiving detected voltage and current information, current amplitude and phase value information, and the mechanism and the structure are formed by functionally connecting a wireless data transmission communication module and a receiving antenna thereof, a digital processing module and an input circuit. The configurations described in this example all have a digitizing mechanism and then wirelessly transmit the sensed voltage and current information, current magnitude and phase values information to the device with little or no error. 3) The device may be provided with computing means comprising a microcomputer or microprocessor and its software programs and ancillary circuits, and the computing means and its structure may be designed and implemented using known and commonly used technical content, not to mention a few. a. The equipment calculating mechanism can calculate the sampled or detected voltage and current information according to a mathematical formula and obtain the metering error value of the high-voltage transformer monitored in real time on line. Wherein the mathematical formula is:
Figure C20071013012100391
Figure C20071013012100392
the meanings of the terms and symbols in the formulae are the same as those in the first embodiment (a), and thus, the description thereof is not repeated. b. The device can add all monitored errors in real time through a mathematical formula by using a calculation mechanism so as to calculate a comprehensive error value of the high-voltage electric energy metering device. For a three-phase three-wire system, the mathematical formula is:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Uab</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>ab</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ia</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>3</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ucb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>cb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ic</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C20071013012100394
Figure C20071013012100395
for a three-phase four-wire system, the mathematical formula is:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ua</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>a</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ia</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>2</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ub</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>b</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ib</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C20071013012100397
Figure C20071013012100399
in the two formulas: the meanings of the terms and symbols are the same as those described in the first embodiment (a), and are not repeatedThe above-mentioned processes are described. The real-time online detection method for the errors of the electric energy meter comprises the following steps: using a known electric energy metering instrument to meter or detect errors of the electric energy meter on line in real time; the real-time online detection method for the ratio difference and the angular difference of the secondary voltage drop of the voltage loop comprises the following steps: and (3) measuring or detecting the specific difference and the angular difference of the secondary pressure drop on line in real time by using a known specific difference and angular difference measuring instrument of the secondary pressure drop. The above-mentioned metering or detecting method and its operation can be referred to the structure of the attached figure 1 of the present specification.
Embodiment II, real-time online monitoring method and monitoring equipment for comprehensive errors of high-voltage electric energy metering device
The content of the embodiment comprises two parts, namely a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device and a real-time online monitoring device for the comprehensive error of the high-voltage electric energy metering device.
Real-time online monitoring method for comprehensive errors of high-voltage electric energy metering device
The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is a real-time online, real and accurate method for monitoring the comprehensive error of the high-voltage electric energy metering device for a long time, and is technically characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The comprehensive error of the high-voltage electric energy metering device comprises the following steps: the metering error of the high-voltage potential transformer, the metering error of the high-voltage current transformer, the voltage drop of a secondary circuit of the high-voltage potential transformer and the metering error of the electric energy meter are added in real time through a formula, and the sum error is the comprehensive error of the high-voltage electric energy metering device. The voltage drop of the secondary circuit of the high-voltage transformer and the metering error of the electric energy meter can be implemented by a known metering or detecting method. The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is as shown in the attached figure 1 in the specification: the high-voltage transformer metering error and the high-voltage current transformer metering error can be monitored only by adopting a precise and special metering or detecting instrument which has the performances of high voltage resistance, strong current (heavy current) resistance, real-time online long-term use, required precision degree, required safe operation and the like. The metering error of the high-voltage potential transformer can be monitored by adopting at least one special instrument 22 for metering or detecting voltage and current information and a detection accessory 21 thereof to simultaneously meter or detect the secondary side voltage value and the current value of the high-voltage potential transformer on line in real time or detect the secondary side voltage value and the current value of the high-voltage potential transformer on line, collect the sampled or detected voltage and current information on the metering or detecting instrument 22 of the precision thereof in a wired transmission or wireless transmission/receiving mode in real time, without error or with negligible error through the detection accessory 21, and the detecting instrument 22 is provided with a calculating mechanism for calculating the secondary side voltage value and the current value according to:
Figure C20071013012100401
Figure C20071013012100402
and calculating to obtain a metering error value of the high-voltage transformer. The method of collecting the sampled or detected voltage and current information in real time, error-free or error-negligible manner by wired transmission to the measuring or detecting instrument 22 of its accuracy is as follows: the measurement accessory 21 and its cable of the precision measurement or inspection instrument 22 have fixed known measurement error values and are subtracted to be error-free in the measurement, which requires that its measurement accessory be fixed and have fixed known measurement error values. Alternatively, the method of collecting the sampled or detected voltage and current information to the measuring or detecting instrument 22 with its accuracy in real time, without error or with negligible error by wire transmission or wireless transmission/reception is: the voltage and current information sampled or detected by the detection accessory 21 of the metering or detecting instrument 22 with the precision is digitalized and then collected on the metering or detecting instrument 22 with the precision in a wired transmission or wireless transmission/receiving method without error or with negligible error. The metering error of the high-voltage current transformer is monitored, and at least one special metering or current amplitude detection mode can be adoptedAnd the instrument 9 of the phase place and its detecting attachment 8 measure or detect the magnitude and phase value of the current of the primary side high voltage and secondary side mutual inductance of the high-voltage current transformer online in real time at the same time, and collect the magnitude and phase value information of the current sampled or detected to its specialized measuring or detecting instrument 9 in a wired transmission or wireless sending/receiving way in real time, error-free or error-neglectable way through its detecting attachment 8, in order to measure the measuring error of the high-voltage current transformer. The method for collecting the sampled or detected current amplitude and phase information to the special metering or detecting instrument 9 in real time without error or with negligible error in a wired transmission mode is as follows: the test accessory 8 and its cable of the dedicated measuring or testing instrument 9 are used with a fixed known test error value and are subtracted out to be error-free in the measurement. Alternatively, the method of collecting the sampled or detected information in real time, without error or with negligible error, in a wired transmission or wireless transmission/reception manner, to its dedicated metering or detecting instrument 9, is: the current amplitude value and phase value information sampled or detected by the detection attachment 8 of the special metering or detecting instrument 9 is digitalized and then collected on the special metering or detecting instrument 9 in a wired transmission or wireless transmission/receiving method without error or with negligible error. The rest of the materials which are not described are all the same as those in the first embodiment.
(II) real-time online monitoring equipment for comprehensive error of high-voltage electric energy metering device
The real-time online monitoring equipment for the comprehensive error of the high-voltage electric energy metering device is designed and manufactured according to a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device. The main body of the device is shown in fig. 1-3, 4 and 7, which comprises: the mechanism and structure for accurately measuring or detecting voltage and current information, namely, the real-time online monitoring part for measuring error of the high-voltage transformer shown in fig. 2, the mechanism and structure for specially measuring or detecting current amplitude and phase value information, namely, the real-time online monitoring part for measuring error of the high-voltage current transformer shown in fig. 3, and the mechanism and structure for measuring or detecting electric energy, namely, the real-time online monitoring part for voltage drop error of the secondary circuit of the high-voltage transformer shown in fig. 1, even the real-time online monitoring part for measuring error of the electric energy meter (such as 15 in fig. 1), which mechanisms and structures should be used by the measuring or detecting parts can be solved and designed by the existing known and public technical contents, and are not further described. The precise, dedicated metering or detection instrument used is meant to be: firstly, the metering error of the high-voltage potential transformer is monitored under the conditions of high voltage (such as more than 10 KV) and strong current (large current), and the metering error of the high-voltage current transformer is monitored; secondly, real-time online long-term monitoring is carried out on the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer under the conditions of high voltage and strong current. In other words, the measuring or detecting instrument with high precision and special purpose must have the performances of high voltage resistance, strong current (large current) resistance, real-time online long-term use, satisfactory precision degree, satisfactory safe operation and the like, so as to monitor the measuring error of the high-voltage transformer and the measuring error of the high-voltage current transformer. The equipment is characterized in that: the device must comprise or be provided with at least one detection accessory for detecting voltage and current information in real time without error or with negligible error, must comprise or be provided with at least one detection accessory for detecting current amplitude and phase value information in real time without error or with negligible error, and must comprise or be provided with at least one detection accessory for detecting electric energy metering information in real time without error or with negligible error; the device includes or is provided with at least one or more (such as two) comprehensive detection accessories which are formed by detecting voltage and current information, current amplitude and phase value information and electric energy metering information in real time without error or with negligible error, wherein the detection accessories are detection terminals. The device is provided with at least one measuring end and a cable thereof for measuring or detecting voltage and current information, at least one measuring end and a cable thereof for measuring or detecting current amplitude value and phase value information, at least one or more (such as two) comprehensive measuring ends and cables thereof which are jointly formed by the measuring ends and the cable thereof, and at least one detecting accessory (measuring end) in total, namely 8, 17, 21 and the like in figures 1-3. To make these detectors error free or negligibly small in metrology requires that the detectors and their cables have a fixed structure and a fixed known detection error value and be subtracted out to be error free or negligibly small. The real-time online detection method for the error of the electric energy meter uses the known metering or detecting method, and the specific difference and the angular difference of the secondary voltage drop of the voltage loop are the real-time online detection methods for the error of the electric energy meter. The rest of the materials which are not described are all the same as those in the first embodiment.
Third embodiment, real-time online monitoring method and monitoring equipment for comprehensive errors of high-voltage electric energy metering device
The content of the embodiment comprises two parts, namely a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device and a real-time online monitoring device for the comprehensive error of the high-voltage electric energy metering device.
Real-time online monitoring method for comprehensive errors of high-voltage electric energy metering device
The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is a real-time online, real and accurate method for monitoring the comprehensive error of the high-voltage electric energy metering device for a long time, and is technically characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The comprehensive error of the high-voltage electric energy metering device comprises the following steps: the metering error of the high-voltage potential transformer, the metering error of the high-voltage current transformer, the voltage drop of a secondary circuit of the high-voltage potential transformer and the metering error of the electric energy meter are added in real time through a formula, and the sum error is the comprehensive error of the high-voltage electric energy metering device. This has been described previously and will not be repeated. The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is as shown in the attached figure 1 in the specification: the high-voltage transformer metering error and the high-voltage current transformer metering error can be monitored only by adopting a precise and special metering or detecting instrument which has the performances of high voltage resistance, strong current (heavy current) resistance, real-time online long-term use, required precision degree, required safe operation and the like. The measuring or detecting instrument with the precision is an instrument for monitoring the measuring error of the high-voltage potential transformer, and is designed and manufactured according to a real-time online monitoring method for the measuring error of the high-voltage potential transformer. The special metering or detecting instrument is used for monitoring the metering error of the high-voltage current transformer and is designed and manufactured according to a real-time online monitoring method for the metering error of the high-voltage current transformer. The main body part (4 and 9 in the figure) of the instrument comprises a mechanism and a structure for measuring or detecting the secondary side voltage value and the secondary side current value of the high-voltage potential transformer, a mechanism and a structure for measuring or detecting the primary side current amplitude value and the secondary side current amplitude value of the high-voltage potential transformer, and the instrument also comprises: instrument housings, panels, and metering or sensing electronics therein, etc. The mechanism and structure for measuring or detecting the voltage value and the current value of the secondary side of the high-voltage potential transformer and the mechanism and structure for measuring or detecting the amplitude value and the phase value of the current of the primary side and the secondary side of the high-voltage potential transformer can be solved and designed by the existing known and public technical content, and need not be described in more detail. The method is characterized in that: the measuring or detecting instrument (device) of this example must have at least one or more than one (such as two or three, etc.) detecting accessories capable of wire-transmitting the detected voltage and current information and current amplitude and phase information in real time without error or with negligible error, wherein the detecting accessories are extensions of the wire-transmitted measuring or detecting information. These extensions are: the device is provided with at least one split or branch mechanism for transmitting detected voltage and current information by wire, at least one split or branch mechanism for transmitting detected current amplitude and phase value information by wire, and at least one split or branch mechanism for transmitting detected voltage and current information, current amplitude and phase value information by wire. The rest of the parts which are not described are all the same as those in the first embodiment, (a), and those in the second embodiment, (a), and are not repeated.
(II) real-time online monitoring equipment for comprehensive error of high-voltage electric energy metering device
The real-time online monitoring equipment for the comprehensive error of the high-voltage electric energy metering device is designed and manufactured according to a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device. The main body of the device is shown in fig. 1-3, 5 and 8, which comprises: the mechanism and structure for accurately measuring or detecting voltage and current information, namely the real-time online monitoring part for measuring error of the high-voltage potential transformer shown in fig. 2, comprises a mechanism and structure for specially measuring or detecting current amplitude and phase value information, namely the real-time online monitoring part for measuring error of the high-voltage potential transformer shown in fig. 3, and also comprises a mechanism and structure for measuring or detecting electric energy, namely the real-time online monitoring part for error caused by voltage drop of a secondary circuit of the high-voltage potential transformer shown in fig. 1, even the real-time online monitoring part for measuring error of an electric energy meter (such as 15 in fig. 1). Which should be solved and designed by the existing known and commonly used technical content, and not described in more detail. The precise, dedicated metering or detection instrument used is meant to be: firstly, the metering error of the high-voltage potential transformer is monitored under the conditions of high voltage (such as over 10 KV) and strong current (large current), and the metering error of the high-voltage current transformer is monitored. Secondly, real-time online long-term monitoring is carried out on the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer under the conditions of high voltage and strong current. In other words, the measuring or detecting instrument with high precision and special purpose must have the performances of high voltage resistance, strong current (large current) resistance, real-time online long-term use, satisfactory precision degree, satisfactory safe operation and the like, so as to monitor the measuring error of the high-voltage transformer and the measuring error of the high-voltage current transformer. The equipment is characterized in that: 1) the device must include or have at least one detection accessory for the live, error-free or error-negligible wired transmission of detected voltage and current information, must include or have at least one detection accessory for the live, error-free or error-negligible wired transmission of detected current magnitude and phase information, and must include or have at least one detection accessory for the live, error-free or error-negligible wired transmission of detected power metering information; or the device must include or have at least one or more (e.g., two) integrated detection accessories capable of wired transmission of real-time, error-free or error-negligible detected voltage and current information, detected current magnitude and phase information, and detected power metering information, said detection accessories being: the device is provided with at least one mechanism for wired transmission of measured or detected voltage and current information, at least one mechanism for wired transmission of measured or detected current amplitude and phase information, at least one mechanism for wired transmission of detected electric energy measurement information, and at least one comprehensive detection mechanism formed by the mechanisms, wherein the mechanisms are all composed of electronic mechanisms, the mechanisms are connected with a main body part of the device through a transmission wired cable, the mechanisms are split parts arranged outside the main body part of the device and form sub-machines of the device, and the sub-machines are composed of a shell and the electronic mechanisms in the shell. The specific structure of the mechanism for wire transmission of detected current amplitude and phase value information between the extension and the equipment, the mechanism for wire transmission of detected voltage and current information between the extension and the equipment, and the comprehensive mechanism for wire transmission of detected voltage and current information, current amplitude and phase value information between the extension and the equipment is as follows: the device is composed of sampling circuit for voltage and current information, current amplitude and phase information and their comprehensive information, A/D conversion circuit controlled by controller, transmission circuit, transmission cable, interface circuit and connector, and input circuit. The structure of the mechanism for wire transmission of detected voltage and current information between the extension and the equipment is composed of a sampling circuit, an analog/digital conversion circuit 30 controlled by a controller 29, a photoelectric isolation circuit (out) 31, a differential amplification output circuit 32, a transmission circuit, a differential amplification input circuit 33, a photoelectric isolation circuit (in) 34 and an input circuit which are connected one by one. The structure of the mechanism for wire transmission of detected current amplitude and phase value information between the extension and the device, and the structure of the comprehensive mechanism for wire transmission of detected voltage and current information and current amplitude and phase value information between the extension and the device are all formed by connecting a sampling circuit, an analog-to-digital conversion circuit 30 controlled by the controller 29, an electro-optical conversion interface circuit 36, a transmission optical fiber 37, an electro-optical conversion interface circuit 38 and an amplification input circuit 39 one by one. The rest of the parts which are not described are all the same as those in the first embodiment (second), and the parts in the second embodiment (second), and are not repeated.
Fourth embodiment, real-time online monitoring method and monitoring equipment for comprehensive errors of high-voltage electric energy metering device
The content of the embodiment comprises two parts, namely a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device and a real-time online monitoring device for the comprehensive error of the high-voltage electric energy metering device.
Real-time online monitoring method for comprehensive errors of high-voltage electric energy metering device
The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is a real-time online, real and accurate method for monitoring the comprehensive error of the high-voltage electric energy metering device for a long time, and is technically characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is as shown in the attached figure 1 in the specification: the high-voltage transformer metering error and the high-voltage current transformer metering error can be monitored only by adopting a precise and special metering or detecting instrument which has the performances of high voltage resistance, strong current (heavy current) resistance, real-time online long-term use, required precision degree, required safe operation and the like. 1) The measuring or detecting instrument of the precision is an instrument for monitoring the measuring error of the high-voltage potential transformer, and is designed and manufactured according to a real-time online monitoring method of the measuring error of the high-voltage potential transformer. The main body part of the real-time online monitoring device for the metering error of the high-voltage transformer comprises a mechanism and a structure for accurately metering or detecting voltage and current information, and is characterized in that: the device must comprise or be equipped with at least one detection accessory for detecting voltage and current information in real time, without errors or with negligible errors, said detection accessory being an extension for wirelessly transmitting detection information. The device is provided with at least one mechanism for wirelessly transmitting the information of the measured or detected voltage and current, wherein the mechanism is composed of electronic mechanisms, the mechanism is in wireless transmission/reception communication with the main body part of the device, the mechanisms are split parts arranged outside the main body part of the device and form a sub-set of the device, and the sub-set is composed of a shell and the electronic mechanisms inside the shell. The corresponding device of this example is provided with a mechanism and structure for wirelessly receiving the detected voltage and current information. 2) The special metering or detecting instrument is used for monitoring the metering error of the high-voltage current transformer and is designed and manufactured according to a real-time online monitoring method for the metering error of the high-voltage current transformer. The main body part of the device for monitoring the metering error of the high-voltage current transformer in real time on line comprises a mechanism and a structure special for metering or detecting the information of current amplitude and phase value, and is characterized in that: the device comprises or is provided with at least one detection accessory for detecting current amplitude value and phase value information in real time without error or with negligible error, wherein the detection accessory is an extension for wirelessly transmitting detection information. The device is provided with at least one mechanism for wirelessly transmitting information on the amplitude and phase values of the current to be measured or detected, wherein the mechanism is composed of electronic mechanisms, the mechanism is in wireless transmission/reception communication with the main body part of the device, the mechanisms are split parts arranged outside the main body part of the device and form a sub-set of the device, and the sub-set is composed of a shell and the electronic mechanisms inside the shell. The corresponding device of this example is required to have a mechanism and structure for wirelessly receiving information on the detected current amplitude value and phase value. The rest of the materials which are not described are all the same as those in the first embodiment (a) to the third embodiment (a), and are not repeated.
(II) real-time online monitoring equipment for comprehensive error of high-voltage electric energy metering device
The real-time online monitoring equipment for the comprehensive error of the high-voltage electric energy metering device is designed and manufactured according to a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device. The main body of the device is shown in fig. 1-3, 6 and 9, which comprises: the mechanism and structure for accurately measuring or detecting voltage and current information, the mechanism and structure for specially measuring or detecting current amplitude and phase information, the mechanism and structure for measuring or detecting electric energy, and even the mechanism and structure for real-time on-line monitoring the measuring error of the electric energy meter (such as 15 in fig. 1) can be solved and designed by the existing known and public technologies, which need not be described in detail. The precise, dedicated metering or detection instrument used is meant to be: firstly, the metering error of the high-voltage potential transformer is monitored under the conditions of high voltage (such as over 10 KV) and strong current (large current), and the metering error of the high-voltage current transformer is monitored. Secondly, real-time online long-term monitoring is carried out on the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer under the conditions of high voltage and strong current. In other words, the precision-adopted special metering or detecting instrument must have the performances of high voltage resistance, strong current (large current) resistance, real-time online long-term use, satisfactory precision degree, satisfactory safe operation and the like so as to monitor the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer. The equipment is characterized in that: the device must comprise or be provided with at least one detection accessory for detecting voltage and current information in real time without error or with negligible error, must comprise or be provided with at least one detection accessory for detecting current amplitude and phase value information in real time without error or with negligible error, and must comprise or be provided with at least one detection accessory for detecting electric energy metering information in real time without error or with negligible error; the device comprises or is provided with at least one or more (such as two) comprehensive detection accessories which are formed by the detection accessories and can detect the voltage and current information, the current amplitude value and phase value information and the electric energy metering information in real time without errors or with negligible errors, wherein the detection accessories are at least one mechanism for wirelessly transmitting the measured or detected voltage and current information, at least one mechanism for wirelessly transmitting the measured or detected current amplitude value and phase value information, at least one mechanism for wirelessly transmitting the detected electric energy metering information and at least one detection mechanism for the comprehensive information formed by the mechanisms, and the mechanisms are all formed by electronic mechanisms. The mechanisms are in wireless transmission/reception communication with the main body part of the equipment, the mechanisms are split parts arranged outside the main body part of the equipment and form the sub-units of the equipment, and the sub-units consist of a shell and electronic mechanisms in the shell. The device is provided with at least one split or branch mechanism for wirelessly transmitting detected voltage and current information, at least one split or branch mechanism for wirelessly transmitting detected current amplitude and phase value information, and at least one integrated split or branch mechanism for wirelessly transmitting detected voltage and current information, current amplitude and phase value information. The detailed structure of the mechanism for wirelessly transmitting/receiving the detected voltage and current information between the slave unit and the device, the mechanism for wirelessly transmitting/receiving the detected current amplitude and phase value information between the slave unit and the device, and the comprehensive mechanism for wirelessly transmitting/receiving the detected voltage and current information and current amplitude and phase value information between the slave unit and the device is as follows: the extension set for wirelessly transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof is structurally composed of a sampling circuit, an analog-to-digital conversion circuit controlled by a controller, a digital modulation circuit, a frequency conversion transmitting circuit and a transmitting antenna thereof in functional connection; the corresponding equipment is provided with a mechanism and a structure for wirelessly receiving detected voltage and current information, current amplitude and phase value information, and the mechanism and the structure are formed by functionally connecting a receiving and frequency conversion circuit, a receiving antenna thereof, a digital demodulation circuit and an input circuit. The rest of the materials which are not described are all the same as those in the first embodiment (II) to the third embodiment (II), and are not repeated.
Fifth embodiment, real-time online monitoring method and monitoring equipment for comprehensive errors of high-voltage electric energy metering device
The content of the embodiment comprises two parts, namely a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device and a real-time online monitoring device for the comprehensive error of the high-voltage electric energy metering device.
Real-time online monitoring method for comprehensive errors of high-voltage electric energy metering device
The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is a real-time online, real and accurate method for monitoring the comprehensive error of the high-voltage electric energy metering device for a long time, and is technically characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is as shown in the attached figure 1 in the specification: the high-voltage transformer metering error and the high-voltage current transformer metering error can be monitored only by adopting a precise and special metering or detecting instrument which has the performances of high voltage resistance, strong current (heavy current) resistance, real-time online long-term use, required precision degree, required safe operation and the like. The real-time online monitoring method for the metering error of the high-voltage transformer is adopted to design and manufacture the real-time online monitoring device for the metering error of the high-voltage transformer, the real-time online monitoring device for the metering error of the high-voltage current transformer is designed and manufactured by adopting the real-time online monitoring method for the metering error of the high-voltage current transformer, and the two devices are integrated into a high-voltage electric energy metering device integrated error real-time online monitoring device, the main body part of the device comprises a mechanism and a structure for accurately metering or detecting voltage and current information, a mechanism and a structure for specially metering or detecting current amplitude and phase value information, and a mechanism and a structure for metering or detecting electric energy, and the method is characterized in that: the device must comprise or be provided with at least one detection accessory for detecting voltage and current information in real time, without error or with negligible error, at least one detection accessory for detecting current amplitude and phase value information in real time, without error or with negligible error, and at least one detection accessory for detecting electric energy metering information in real time, without error or with negligible error. The device comprises or is provided with at least one detection accessory which detects voltage and current information, current amplitude and phase value information and electric energy metering information in real time without error or with negligible error to form a comprehensive detection accessory, wherein the detection accessories are detection terminals or/and extension sets. 1) The device has at least one measuring or detecting terminal for voltage and current information, at least one measuring or detecting terminal for current amplitude and phase information, at least one measuring terminal for electric energy measurement information and its cable, and at least one integrated measuring terminal composed of them and its cable. I.e. four in total with four detection terminals and their cables. The detection cable of the detection end and the sampling detection end are provided with fixed structures. If the length of the cable is fixed, the detection end is fixed, the electrical structural parameters are fixed, and the detection error caused by the detection end when detecting the voltage and current information and the detection error caused by the detection end when detecting the current amplitude value and phase value information are fixed and known, the detection errors can be deducted during detection, and the errors are free from errors or can be neglected in measurement. 2) The device may have at least one means for wired transmission of information about the measured or detected voltage and current, at least one means for wired transmission of information about the magnitude and phase of the measured or detected current, at least one means for wired transmission of information about the measured electrical energy, and at least one means for integrated detection formed by the two means, which means are formed by electronic means. The mechanisms are connected with the main body part of the equipment through transmission wired cables, the mechanisms are split parts arranged outside the main body part of the equipment and form the sub-units of the equipment, and the sub-units consist of a shell and electronic mechanisms in the shell. These electronic mechanisms are: the device comprises a mechanism and a structure for wire transmission of detected voltage and current information, a mechanism and a structure for wire transmission of detected current amplitude and phase value information, and a mechanism and a structure for wire transmission of integrated information of detected voltage and current information and current amplitude and phase value information. The rest of the materials which are not described are all the same as those in the first embodiment (a) to the fourth embodiment (a), and are not repeated.
(II) real-time online monitoring equipment for comprehensive error of high-voltage electric energy metering device
The real-time online monitoring equipment for the comprehensive error of the high-voltage electric energy metering device is designed and manufactured according to a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device. The main body of the device is shown in fig. 1-4, 6, 7 and 9, which comprises: the mechanism and structure for accurately measuring or detecting voltage and current information, the mechanism and structure for specially measuring or detecting current amplitude and phase information, the mechanism and structure for measuring or detecting electric energy, and even the mechanism and structure for real-time on-line monitoring of measuring error of an electric energy meter (such as 15 in fig. 1) can be solved and designed by the existing known and public technical contents, which should not be described in detail. The precise, dedicated metering or detection instrument used is meant to be: firstly, the metering error of the high-voltage potential transformer is monitored under the conditions of high voltage (such as over 10 KV) and strong current (large current), and the metering error of the high-voltage current transformer is monitored. Secondly, real-time online long-term monitoring is carried out on the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer under the conditions of high voltage and strong current. In other words, the measuring or detecting instrument with high precision and special purpose must have the performances of high voltage resistance, strong current (large current) resistance, real-time online long-term use, satisfactory precision degree, satisfactory safe operation and the like, so as to monitor the measuring error of the high-voltage transformer and the measuring error of the high-voltage current transformer. The equipment is characterized in that: the device must comprise or be provided with at least one detection accessory for detecting voltage and current information in real time, without error or with negligible error, at least one detection accessory for detecting current amplitude and phase value information in real time, without error or with negligible error, and at least one detection accessory for detecting electric energy metering information in real time, without error or with negligible error. The device includes or is provided with at least one or more (such as two) comprehensive detection accessories which are formed by detecting voltage and current information, current amplitude and phase value information and electric energy metering information in real time without error or with negligible error, wherein the detection accessories are all detection terminals or/and extension sets. 1) The device has at least one measuring or detecting terminal for voltage and current information, at least one measuring or detecting terminal for current amplitude and phase information, at least one measuring terminal for electric energy measurement information and its cable, and at least one integrated measuring terminal composed of them and its cable. I.e. four in total with four detection terminals and their cables. The detection cable of the detection end and the sampling detection end have fixed structures, such as fixed cable length, fixed detection end, fixed electrical structure parameters and the like, so that detection errors caused by the detection end when detecting voltage and current information and detection errors caused by the detection end when detecting current amplitude value and phase value information are fixed and known, can be deducted in detection, and become error-free or error-negligibly small in measurement. 2) The device may have at least one means for wired transmission of information on the measured or detected voltage and current, at least one means for wired transmission of information on the measured or detected current amplitude and phase values, at least one means for wired transmission of information on the detected power measurement, and at least one means for integrated detection consisting of the same, the means comprising electronic means. The mechanisms are connected with the main body part of the equipment through transmission wired cables, the mechanisms are split parts arranged outside the main body part of the equipment and form the sub-units of the equipment, and the sub-units consist of a shell and electronic mechanisms in the shell. These electronic mechanisms are: the mechanism and the structure of the voltage and the current information which are detected by wired transmission, the mechanism and the structure of the current amplitude value and the phase value information which are detected by wired transmission, and the mechanism and the structure of the comprehensive information of the voltage and the current information which are detected by wired transmission and the current amplitude value and the phase value information which are detected by wired transmission are formed by connecting a digital sampling circuit, a digital amplifying circuit (a), an electro-optical conversion interface circuit, a transmission optical fiber, an electro-optical conversion interface circuit, a digital amplifying circuit (b) and a digital input circuit one by one. The rest of the materials which are not described are all the same as those in the first embodiment (second) to the fourth embodiment (second), and are not repeated.
Sixth embodiment, real-time online monitoring method and monitoring equipment for comprehensive errors of high-voltage electric energy metering device
The content of the embodiment comprises two parts, namely a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device and a real-time online monitoring device for the comprehensive error of the high-voltage electric energy metering device.
Real-time online monitoring method for comprehensive errors of high-voltage electric energy metering device
The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is a real-time online, real and accurate method for monitoring the comprehensive error of the high-voltage electric energy metering device for a long time, and is technically characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is as shown in the attached figure 1 in the specification: the high-voltage transformer metering error and the high-voltage current transformer metering error can be monitored only by adopting a precise and special metering or detecting instrument which has the performances of high voltage resistance, strong current (heavy current) resistance, real-time online long-term use, required precision degree, required safe operation and the like. The real-time online monitoring method for the metering error of the high-voltage transformer is adopted to design and manufacture the real-time online monitoring device for the metering error of the high-voltage transformer, the real-time online monitoring device for the metering error of the high-voltage current transformer is designed and manufactured by adopting the real-time online monitoring method for the metering error of the high-voltage current transformer, and the two devices are integrated into a high-voltage electric energy metering device integrated error real-time online monitoring device, the main body part of the device comprises a mechanism and a structure for accurately metering or detecting voltage and current information, a mechanism and a structure for specially metering or detecting current amplitude and phase value information, and a mechanism and a structure for metering or detecting electric energy, and the method is characterized in that: the device must comprise or be provided with at least one detection accessory for detecting voltage and current information in real time, without error or with negligible error, at least one detection accessory for detecting current amplitude and phase value information in real time, without error or with negligible error, and at least one detection accessory for detecting electric energy metering information in real time, without error or with negligible error. The device comprises or is provided with at least one detection accessory which detects voltage and current information, current amplitude and phase value information and electric energy metering information in real time without error or with negligible error, and the detection accessories are a detection end and a branch machine. 1) The device has at least one measuring or detecting terminal for voltage and current information, at least one measuring or detecting terminal for current amplitude and phase information, at least one measuring terminal for electric energy measurement information and its cable, and at least one integrated measuring terminal composed of them and its cable. 2) The device is provided with at least one mechanism for wirelessly transmitting information on the measured or detected voltage and current, at least one mechanism for wirelessly transmitting information on the amplitude and phase values of the measured or detected current, at least one mechanism for wirelessly transmitting information on the detected electric energy measurement, and at least one comprehensive detection mechanism which is formed by the mechanisms together, wherein the mechanisms are all composed of electronic mechanisms, the mechanisms are in wireless transmission/reception communication with the main body part of the device, the mechanisms are split parts arranged outside the main body part of the device and form the sub-units of the device, and the sub-units are composed of a shell and the electronic mechanisms inside the shell. These electronic means are extensions and structures for wirelessly transmitting detected voltage and current information, current amplitude and phase value information, and their integrated information. The corresponding equipment is provided with a mechanism and a structure for wirelessly receiving the detected voltage and current information, the current amplitude value and the phase value information, and the digitization structure in the example directly collects the detected voltage and current information, the current amplitude value and the phase value information to the equipment in a wireless transmission/reception mode without errors or with errors being negligibly small. The rest of the materials which are not described are all the same as those in the first embodiment (a), the second embodiment (b) and the fifth embodiment (a), and are not repeated.
(II) real-time online monitoring equipment for comprehensive error of high-voltage electric energy metering device
The real-time online monitoring equipment for the comprehensive error of the high-voltage electric energy metering device is designed and manufactured according to a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device. The main body of the device is shown in fig. 1-4, 6, 7 and 9, which comprises: the mechanism and structure for accurately measuring or detecting voltage and current information, the mechanism and structure for specially measuring or detecting current amplitude and phase information, the mechanism and structure for measuring or detecting electric energy, and even the mechanism and structure for real-time on-line monitoring the measuring error of the electric energy meter (such as 15 in fig. 1) can be solved and designed by the existing known and public technologies, which need not be described in more detail. The precise, dedicated metering or detection instrument used is meant to be: firstly, the metering error of the high-voltage potential transformer is monitored under the conditions of high voltage (such as over 10 KV) and strong current (large current), and the metering error of the high-voltage current transformer is monitored. Secondly, real-time online long-term monitoring is carried out on the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer under the conditions of high voltage and strong current. In other words, the measuring or detecting instrument with high precision and special purpose must have the performances of high voltage resistance, strong current (large current) resistance, real-time online long-term use, satisfactory precision degree, satisfactory safe operation and the like, so as to monitor the measuring error of the high-voltage transformer and the measuring error of the high-voltage current transformer. The equipment is characterized in that: the device must comprise or be provided with at least one detection accessory for detecting voltage and current information in real time without error or with negligible error, must comprise or be provided with at least one detection accessory for detecting current amplitude and phase value information in real time without error or with negligible error, and must comprise or be provided with at least one detection accessory for detecting electric energy metering information in real time without error or with negligible error; or the device must include or have at least one or more (such as two) comprehensive detection accessories which can detect the voltage and current information, the current amplitude and phase value information and the electric energy metering information in real time without error or with negligible error, wherein the detection accessories are a detection end and a branch machine: 1) the device has at least one measuring or detecting terminal for voltage and current information, at least one measuring or detecting terminal for current amplitude and phase information, at least one measuring terminal for electric energy measurement information and its cable, and at least one integrated measuring terminal composed of them and its cable. I.e. four in total with four detection terminals and their cables. The detection cable of the detection end and the sampling detection end are provided with fixed structures. If the length of the cable is fixed, the detection end is fixed, the electrical structural parameters are fixed, and the detection error caused by the detection end when detecting the voltage and current information and the detection error caused by the detection end when detecting the current amplitude value and phase value information are fixed and known, the detection errors can be deducted during detection, and the errors are free from errors or can be neglected in measurement. 2) At least one means of the device belt for wirelessly transmitting information on the measured or detected voltage and current, at least one means of the belt for wirelessly transmitting information on the magnitude and phase values of the measured or detected current, at least one means of the belt for wirelessly transmitting information on the measured power, at least one means of the belt for integrated detection consisting of them, these means consisting of electronic means. The mechanisms are in wireless transmission/reception communication with the main body part of the equipment, the mechanisms are split parts arranged outside the main body part of the equipment and form the sub-units of the equipment, and the sub-units consist of a shell and electronic mechanisms in the shell. The detailed structure of the mechanism for wirelessly transmitting/receiving the detected current amplitude and phase value information between the slave unit and the device, the mechanism for wirelessly transmitting/receiving the detected voltage and current information between the slave unit and the device, and the comprehensive mechanism for wirelessly transmitting/receiving the detected voltage and current information and current amplitude and phase value information between the slave unit and the device is as follows: the voltage and current information, the current amplitude value and phase value information, and the comprehensive information sampling circuit, the controller-controlled A/D conversion circuit, the transmitting circuit and the transmitting antenna function are connected to constitute the extension set for wirelessly transmitting the detected voltage and current information, current amplitude value and phase value information, and the comprehensive information. The sampling component of the sampling circuit can be arranged at the sampling position of the voltage and current information of the secondary side of the tested high-voltage transformer, the current amplitude and phase value information of the primary side and the secondary side of the high-voltage current transformer. The device is also provided with a mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof, wherein the mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof is arranged on the main body part of the device and is formed by functionally connecting a receiving circuit of the voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof, a receiving antenna thereof, an amplifying circuit and an input circuit, and the input circuit is the input circuit of the voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof of the device. The detailed structure of the extension set for wirelessly transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information of the information is formed by functionally connecting a digital sampling circuit, a digital amplifying circuit and a transmitting antenna thereof. The corresponding equipment is provided with a mechanism and a structure for wirelessly receiving detected voltage and current information, current amplitude and phase value information, and the mechanism and the structure are formed by functionally connecting a digital receiving amplifying circuit, a receiving antenna thereof and a digital input circuit. The digitizing structure described in this example directly integrates the detected voltage and current information, current magnitude and phase value information into the device in a wireless transmission/reception manner with no or negligible error. The circuits described above can be designed and fabricated using known and commonly used technologies and known and commercially available electronic circuit components, so long as they can perform or fulfill the functions of the circuits. The rest of the materials which are not described are all the same as those in the first embodiment (second) to the fifth embodiment (second), and are not repeated.
Seventh embodiment, real-time online monitoring method and monitoring equipment for comprehensive errors of high-voltage electric energy metering device
The content of the embodiment comprises two parts, namely a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device and a real-time online monitoring device for the comprehensive error of the high-voltage electric energy metering device.
Real-time online monitoring method for comprehensive errors of high-voltage electric energy metering device
The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is a real-time online, real and accurate method for monitoring the comprehensive error of the high-voltage electric energy metering device for a long time, and is technically characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is as shown in the attached figure 1 in the specification: the high-voltage transformer metering error and the high-voltage current transformer metering error can be monitored only by adopting a precise and special metering or detecting instrument which has the performances of high voltage resistance, strong current (heavy current) resistance, real-time online long-term use, required precision degree, required safe operation and the like. The real-time online monitoring method for the metering error of the high-voltage potential transformer is adopted to design and manufacture the real-time online monitoring device for the metering error of the high-voltage potential transformer, the real-time online monitoring method for the metering error of the high-voltage current transformer is adopted to design and manufacture the real-time online monitoring device for the metering error of the high-voltage current transformer, the two devices are integrated to form the real-time online monitoring equipment for the integrated error of the high-voltage electric energy metering device, and the main part of the equipment comprises: the method comprises the following steps of accurately measuring or detecting the voltage and current information, specially measuring or detecting the current amplitude and phase value information, and measuring or detecting the electric energy, wherein the method is characterized in that: the device must include or have at least one detection accessory for detecting voltage and current information in real time without error or with negligible error, must include or have at least one detection accessory for detecting current amplitude and phase value information in real time without error or with negligible error, must include or have at least one detection accessory for detecting electric energy metering information in real time without error or with negligible error, the device must include or have at least one detection accessory for detecting voltage and current information in real time without error or with negligible error, detecting current amplitude and phase value information and detecting electric energy metering information, which jointly form a comprehensive detection accessory, and the detection accessories are detection extensions: 1) the device has at least one means for wired transmission of measured or sensed voltage and current information, at least one means for wired transmission of measured or sensed current magnitude and phase information, at least one means for wired transmission of sensed power metering information, and at least one means for integrated sensing formed by the two means. 2) The device has at least one means for wirelessly transmitting information on the measured or detected voltage and current, at least one means for wirelessly transmitting information on the magnitude and phase of the measured or detected current, at least one means for wirelessly transmitting information on the measured or detected power measurement, and at least one means for integrated detection formed by the means. The mechanisms for transmitting the measured or detected voltage and current information, the current amplitude value and phase value information and the electric energy measuring information through wired transmission or wireless transmission are all composed of electronic mechanisms. The mechanisms are connected with the main body part of the equipment through wired transmission or through wireless transmission/reception, the mechanisms are split parts arranged outside the main body part of the equipment and form the sub-machines of the equipment, and the sub-machines consist of a shell and electronic mechanisms in the shell. These electronic mechanisms are: the device comprises a mechanism for wire-transmitting detected current amplitude and phase value information between the extension and the device, a mechanism for wire-transmitting detected voltage and current information between the extension and the device, and a mechanism for wire-transmitting detected voltage and current information and current amplitude and phase value information between the extension and the device to be integrated. The corresponding device must have a mechanism and structure for wirelessly receiving the detected voltage and current information, current amplitude and phase value information, and their combined information. The digitizing structure described in this example directly integrates the detected voltage and current information, current magnitude and phase value information into the device in a wireless transmission/reception manner with no or negligible error. The circuits described in the above examples can be designed and fabricated using well known and commonly used technologies and well known and commercially available electronic circuit components, so long as they can perform or fulfill the functions of the circuits. The rest of the materials which are not described are all the same as those in the first embodiment to the sixth embodiment, and are not repeated.
(II) real-time online monitoring equipment for comprehensive error of high-voltage electric energy metering device
The real-time online monitoring equipment for the comprehensive error of the high-voltage electric energy metering device is designed and manufactured according to a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device. The main body of the device is shown in fig. 1-3, 5, 6, 8 and 9, which comprises: the mechanism and structure for accurately measuring or detecting voltage and current information, the mechanism and structure for specially measuring or detecting current amplitude and phase information, the mechanism and structure for measuring or detecting electric energy, and even the mechanism and structure for real-time on-line monitoring the measuring error of the electric energy meter (such as 15 in fig. 1) can be solved and designed by the existing known and public technologies, which need not be described in detail. The precise, dedicated metering or detection instrument used is meant to be: firstly, the metering error of the high-voltage potential transformer is monitored under the conditions of high voltage (such as over 10 KV) and strong current (large current), and the metering error of the high-voltage current transformer is monitored. Secondly, real-time online long-term monitoring is carried out on the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer under the conditions of high voltage and strong current. In other words, the precision-adopted special metering or detecting instrument must have the performances of high voltage resistance, strong current (large current) resistance, real-time online long-term use, satisfactory precision degree, satisfactory safe operation and the like so as to monitor the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer. The method is characterized in that: the device of the embodiment comprises or is provided with at least one detection accessory for detecting voltage and current information in real time without error or with negligible error, comprises or is provided with at least one detection accessory for detecting current amplitude value and phase value information in real time without error or with negligible error, and comprises or is provided with at least one detection accessory for detecting electric energy metering information in real time without error or with negligible error; the device must include or be equipped with at least one or more (for example two) integrated detection accessories, which are all able to detect voltage and current information, current amplitude and phase information and electric energy metering information in real time, without or with negligible error, said detection accessories being detection extensions: 1) the device has at least one means for wired transmission of measured or sensed voltage and current information, at least one means for wired transmission of measured or sensed current magnitude and phase information, at least one means for wired transmission of sensed power metering information, and at least one means for integrated sensing consisting of the two. 2) The device has at least one means for wirelessly transmitting information on the measured or detected voltage and current, at least one means for wirelessly transmitting information on the magnitude and phase of the measured or detected current, at least one means for wirelessly transmitting information on the measured or detected power measurement, and at least one means for integrated detection formed by the means. The above mechanisms for transmitting the measured or detected information by wire transmission or wireless transmission are all composed of electronic mechanisms. The mechanisms are connected with the main body part of the equipment through wired transmission or through wireless transmission/reception, the mechanisms are split parts arranged outside the main body part of the equipment and form the sub-machines of the equipment, and the sub-machines consist of a shell and electronic mechanisms in the shell. The detailed structure of the mechanism for the wired transmission of the detected voltage and current information between the extension set and the equipment is composed of a digital output end, a wired transmission cable and a digital input end. The detailed structure of the mechanism for wire-transmitting the detected current amplitude and phase value information between the extension and the device and the comprehensive mechanism for wire-transmitting the detected current amplitude and phase value information between the extension and the device are the same as those described in the above example, and will not be repeated. The digital transmission architecture described above collects the sensed voltage and current information, current magnitude and phase value information directly, error-free or negligibly, onto the device using wired transmission. The detailed structure of the mechanism for wirelessly transmitting/receiving the detected current amplitude and phase value information between the slave unit and the device, the mechanism for wirelessly transmitting/receiving the detected voltage and current information between the slave unit and the device, and the comprehensive mechanism for wirelessly transmitting/receiving the detected voltage and current information and current amplitude and phase value information between the slave unit and the device is as follows: the extension set for wirelessly transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information of the information is structurally composed of a digital sampling circuit, a digital amplifying circuit and a transmitting antenna of the digital sampling circuit. The corresponding equipment has the mechanism and structure for wirelessly receiving the detected voltage and current information, current amplitude value and phase value information and the comprehensive information of the information, and the mechanism and the structure are formed by functionally connecting a digital receiving amplifying circuit, a receiving antenna thereof and a digital input circuit. The digitizing structure described in this example combines the detected voltage and current information, current magnitude and phase value information directly into the device without error or with error as small as negligible. The circuits described in the above examples can be designed and fabricated using well known and commonly used technologies and well known and commercially available electronic circuit components, so long as they can perform or fulfill the functions of the circuits. The rest of the materials are the same as those in the first embodiment to the sixth embodiment, and the description thereof is not repeated
Eighth embodiment, real-time online monitoring method and monitoring equipment for comprehensive errors of high-voltage electric energy metering device
The content of the embodiment comprises two parts, namely a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device and a real-time online monitoring device for the comprehensive error of the high-voltage electric energy metering device.
Real-time online monitoring method for comprehensive errors of high-voltage electric energy metering device
The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is a real-time online, real and accurate method for monitoring the comprehensive error of the high-voltage electric energy metering device for a long time, and is technically characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is as shown in the attached figure 1 in the specification: the high-voltage transformer metering error and the high-voltage current transformer metering error can be monitored only by adopting a precise and special metering or detecting instrument which has the performances of high voltage resistance, strong current (heavy current) resistance, real-time online long-term use, required precision degree, required safe operation and the like. The real-time online monitoring method for the metering error of the high-voltage transformer is adopted to design and manufacture the real-time online monitoring device for the metering error of the high-voltage transformer, the real-time online monitoring device for the metering error of the high-voltage current transformer is designed and manufactured by adopting the real-time online monitoring method for the metering error of the high-voltage current transformer, and the two devices are integrated to form the real-time online monitoring equipment for the integrated error of the high-voltage electric energy metering device, the main part of the equipment comprises a mechanism and a structure for accurately metering or detecting voltage and current information, a mechanism and a structure for specially metering or detecting current amplitude and phase value information, and a mechanism and a structure for metering or detecting electric energy, and the equipment is: the equipment may be provided with a computing mechanism and structure, the computing mechanism comprising a microcomputer or microprocessor and its software program and auxiliary circuits. The structure of the computing means can be designed and implemented using the known and commonly used technical content of the prior art, which need not be described in more detail. a. The device calculates the sampled or detected voltage and current information according to a mathematical formula to obtain a metering error value of the high-voltage transformer monitored on line in real time, wherein the mathematical formula is as follows:
Figure C20071013012100561
Figure C20071013012100562
the meaning of each item and each symbol in the formula has already been described and will not be repeated. b. The device calculates each error of sampling or detection in real time according to a mathematical formula to obtain a comprehensive error value of the high-voltage electric energy metering device; for a three-phase three-wire system, the mathematical formula is:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Uab</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>ab</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ia</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>3</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ucb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>cb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ic</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C20071013012100564
for a three-phase four-wire system, the mathematical formula is:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ua</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>a</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ia</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>2</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ub</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>b</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ib</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C20071013012100573
Figure C20071013012100574
Figure C20071013012100575
the meaning of each item and each symbol in the two formulae has already been described and will not be repeated. The rest of the materials which are not described are all the same as those in the first embodiment to the seventh embodiment, and are not repeated.
(II) real-time online monitoring equipment for comprehensive error of high-voltage electric energy metering device
The real-time online monitoring equipment for the comprehensive error of the high-voltage electric energy metering device is designed and manufactured according to a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device. The main body of the device is shown in the combination of fig. 1-3, and comprises: the mechanism and structure for accurately measuring or detecting voltage and current information have the mechanism and structure for specially measuring or detecting current amplitude and phase value information, and also have the mechanism and structure for measuring or detecting electric energy, even the mechanism and structure for monitoring the measuring error of the electric energy meter (such as 15 in fig. 1) on line in real time, and what should be solved and designed by the existing known and public technical contents are not described in more detail. The precise, dedicated metering or detection instrument used is meant to be: firstly, the metering error of the high-voltage potential transformer is monitored under the conditions of high voltage (such as over 10 KV) and strong current (large current), and the metering error of the high-voltage current transformer is monitored. Secondly, real-time online long-term monitoring is carried out on the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer under the conditions of high voltage and strong current. In other words, the precision-adopted special metering or detecting instrument must have the performances of high voltage resistance, strong current (large current) resistance, real-time online long-term use, satisfactory precision degree, satisfactory safe operation and the like so as to monitor the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer. The equipment of the embodiment is characterized in that: the equipment may be provided with a calculating mechanism and a calculating structure, wherein the calculating mechanism comprises a microcomputer or a microprocessor, a software program thereof and an auxiliary circuit. The structure of the computing means can be designed and implemented using the known and commonly used technical content of the prior art, which need not be described in more detail. a. The device calculates the sampled or detected voltage and current information according to a mathematical formula to obtain a metering error value of the high-voltage transformer monitored on line in real time, wherein the mathematical formula is as follows:
Figure C20071013012100576
Figure C20071013012100577
the meaning of each item and each symbol in the formula has already been described and will not be repeated. b. The device calculates each error of sampling or detection in real time according to a mathematical formula to obtain a comprehensive error value of the high-voltage electric energy metering device; for a three-phase three-wire system, the mathematical formula is:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Uab</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>ab</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ia</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>3</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ucb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>cb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ic</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C20071013012100583
for a three-phase four-wire system, the mathematical formula is:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ua</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>a</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ia</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>2</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ub</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>b</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ib</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C20071013012100585
Figure C20071013012100586
the meaning of each item and each symbol in the two formulae has already been described and will not be repeated. The rest of the materials which are not described are all the same as those in the first embodiment (II) to the seventh embodiment (II), and are not repeated.
Ninth embodiment real-time online monitoring method and monitoring equipment for comprehensive errors of high-voltage electric energy metering device
The content of the embodiment comprises two parts, namely a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device and a real-time online monitoring device for the comprehensive error of the high-voltage electric energy metering device.
Real-time online monitoring method for comprehensive errors of high-voltage electric energy metering device
The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is a real-time online, real and accurate method for monitoring the comprehensive error of the high-voltage electric energy metering device for a long time, and is technically characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is as shown in the attached figure 1 in the specification: the high-voltage transformer metering error and the high-voltage current transformer metering error can be monitored only by adopting a precise and special metering or detecting instrument which has the performances of high voltage resistance, strong current (heavy current) resistance, real-time online long-term use, required precision degree, required safe operation and the like. The real-time online monitoring method for the metering error of the high-voltage transformer is adopted to design and manufacture the real-time online monitoring device for the metering error of the high-voltage transformer, the real-time online monitoring device for the metering error of the high-voltage current transformer is designed and manufactured by adopting the real-time online monitoring method for the metering error of the high-voltage current transformer, and the two devices are integrated into a high-voltage electric energy metering device integrated error real-time online monitoring device, the main body part of the device comprises a mechanism and a structure for accurately metering or detecting voltage and current information, a mechanism and a structure for specially metering or detecting current amplitude and phase value information, and a mechanism and a structure for metering or detecting electric energy, and the method is characterized in that: the structure of the device which is connected with at least one computing center in a wired transmission way or in a wireless sending/receiving way is as follows: i. the structure of the device and the connected mechanism for wire transmission of the detected voltage and current information, current amplitude value and phase value information and their comprehensive information between the computing center is as follows: the structure of the device for wire transmission of detected voltage and current information, current amplitude and phase information and their comprehensive information mechanism is formed by connecting a digital processing circuit, a wire transmission interface circuit (such as RS232 interface) and a transmission cable one by one. The specific structure of the mechanism for wireless transmission/reception of the detected voltage and current information, current amplitude and phase value information, and their integrated information between the device and the associated computing center is: the structure of the mechanism for wirelessly transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof by the equipment is formed by connecting a digital processing circuit, a wireless interactive interface circuit and a transmitting antenna function thereof; the calculating center connected with the equipment is provided with a mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof, the receiving mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof is arranged in the calculating center and is formed by functionally connecting the voltage and current information, the current amplitude value and phase value information and the comprehensive information receiving antenna thereof, and a wireless interactive interface circuit (such as an Ethernet interface). The rest of the materials which are not described are all the same as those in the first embodiment to the eighth embodiment, and are not repeated.
(II) real-time online monitoring equipment for comprehensive error of high-voltage electric energy metering device
The real-time online monitoring equipment for the comprehensive error of the high-voltage electric energy metering device is designed and manufactured according to a real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device. The main body of the device is shown in the combination of fig. 1-3, and comprises: the mechanism and structure for accurately measuring or detecting voltage and current information have the mechanism and structure for specially measuring or detecting current amplitude and phase value information, and also have the mechanism and structure for measuring or detecting electric energy, even the mechanism and structure for monitoring the measuring error of the electric energy meter (such as 15 in fig. 1) on line in real time, and the mechanism and structure of the above measuring or detecting part can be solved and designed by the existing known and public technical content, which is not described in more detail. The precise, dedicated metering or detection instrument used is meant to be: firstly, the metering error of the high-voltage potential transformer is monitored under the conditions of high voltage (such as over 10 KV) and strong current (large current), and the metering error of the high-voltage current transformer is monitored. Secondly, real-time online long-term monitoring is carried out on the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer under the conditions of high voltage and strong current, in other words, the metering or detecting instrument which adopts precision and is special must have the performances of high voltage resistance, strong current resistance (large current), real-time online long-term use, satisfactory precision degree, satisfactory safe operation and the like, so that the metering error of the high-voltage transformer and the metering error of the high-voltage current transformer can be monitored. The equipment of the embodiment is characterized in that: the structure of the device which is connected with at least one computing center in a wired transmission way or in a wireless sending/receiving way is as follows: i. the structure of the device and the connected mechanism for wire transmission of the detected voltage and current information, current amplitude value and phase value information and their comprehensive information between the computing center is as follows: the structure of the mechanism for the wired transmission of the detected voltage and current information, current amplitude value and phase value information and the comprehensive information of the information is formed by connecting a digital processing circuit, a wired transmission interface circuit (such as an RS232 interface) and a transmission cable one by one. The specific structure of the mechanism for wireless transmission/reception of the detected voltage and current information, current amplitude and phase value information, and their integrated information between the device and the associated computing center is: the structure of the mechanism for wirelessly transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof by the equipment is formed by connecting a digital processing circuit, a wireless interactive interface (such as an Ethernet interface) circuit and a transmitting antenna function thereof; the calculating center connected with the device is correspondingly provided with a mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof, and the receiving mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof is arranged in the calculating center and is formed by functionally connecting the voltage and current information, the current amplitude value and phase value information and the comprehensive information receiving antenna thereof and a wireless interactive interface circuit. The rest of the parts which are not described are all the same as those in the first embodiment to the eighth embodiment, and are not repeated.

Claims (11)

1. A real-time online monitoring method for the comprehensive error of a high-voltage electric energy metering device is a method for monitoring the comprehensive error of the high-voltage electric energy metering device on line in real time and for a long time, and is characterized in that: the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device comprises the following steps: the comprehensive errors of the high-voltage electric energy metering device to be measured are simultaneously measured or detected in real time on line by adopting a precise and special measuring or detecting instrument, and the errors comprise: the metering error of the high-voltage potential transformer, the metering error of the high-voltage current transformer, the voltage drop of a secondary circuit of the high-voltage potential transformer and the metering error of the electric energy meter are added in real time through a formula, namely the comprehensive error of the high-voltage electric energy metering device is obtained, and for a three-phase three-wire system, the formula is as follows:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Uab</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>ab</mi> </msub> <msub> <mrow> <mo>+</mo> <mi>f</mi> </mrow> <mi>Ia</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>3</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ucb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>cb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ic</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C2007101301210002C2
Figure C2007101301210002C3
in the formula: epsilon- -the composite error of the high voltage electric energy metering device;
εW1、εW3-relative error (%) of the first and third phase power meters;
P′1、P′3-the measured ac power (energy) values of the first and third phase power meters;
fUab、δUabAB-phase high-voltage potential transformer (or secondary line voltage of high-voltage potential transformer)
Figure C2007101301210002C4
) The ratio difference (%) and the angle difference (');
fUcb、δUcb-CB phase high voltage transformer (or secondary line voltage of high voltage transformer)
Figure C2007101301210002C5
) The ratio difference (%) and the angle difference (');
fIa、δIa-specific and angular differences (%) and (') of a-phase high-voltage current transformers;
fIc、δIc-specific and angular differences (%) and (') of the C-phase high-voltage current transformers;
fab、δab-specific and angular differences (%) of the AB phase voltage secondary circuit pressure drops;
fcb、δcb-specific and angular differences (%) of the CB phase voltage secondary circuit voltage drops;
(%) -ratio difference: percent;
(') -angular difference: the unit is minutes;
Figure C2007101301210002C6
Figure C2007101301210002C7
respectively are
Figure C2007101301210002C8
And
Figure C2007101301210002C9
in the middle of the furnace, the gas-liquid separation chamber,
Figure C2007101301210002C10
andthe phase angle between;
Figure C2007101301210002C12
Figure C2007101301210002C13
-AB phase voltage at the energy meter and CB phase voltage at the energy meter;
Figure C2007101301210002C14
-a secondary current phasor;
for a three-phase four-wire system, the formula is:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ua</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <mrow> <msub> <mi>f</mi> <mrow> <mi>a</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ia</mi> </msub> </mrow> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>2</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ub</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>b</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ib</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C2007101301210003C1
Figure C2007101301210003C3
in the formula: epsilon- -the composite error of the high voltage electric energy metering device;
εW1、εW2、εW3-errors (%) of the first, second and third phase power meters;
fIa、δIa、fIb、δIb、fIc、δIc-specific differences (%) and angular differences (') of phase a, phase B, phase C current transformers;
fUa0、δUa0、fUb0、δUb0、δUc0、δUc0the specific difference (%) and the angular difference (') of the phase A, the phase B and the phase C voltage transformers;
fa0、δa0、fb0、δb0、fc0、δc0-specific and angular differences (%) and (') of the voltage drops of the A, B, C phase voltage secondary circuits, respectively;
P′1、P′2、P′3-the ac power electric energy values measured by the power electric energy meters of the respective phases;
Figure C2007101301210003C5
Figure C2007101301210003C6
respectively areAndin the middle of the furnace, the gas-liquid separation chamber,and
Figure C2007101301210003C10
in the middle of the furnace, the gas-liquid separation chamber,
Figure C2007101301210003C11
and
Figure C2007101301210003C12
the phase angle between;
Figure C2007101301210003C14
Figure C2007101301210003C15
-a phase voltage at the electric energy meter, a phase voltage at the electric energy meter;
Figure C2007101301210003C16
Figure C2007101301210003C17
-a secondary current phasor;
the real-time online detection method for the errors of the electric energy meter comprises the following steps: using a known electric energy metering instrument to meter or detect errors of the electric energy meter on line in real time; the real-time online detection method for the ratio difference and the angular difference of the secondary voltage drop of the voltage loop comprises the following steps: and (3) measuring or detecting the specific difference and the angular difference of the secondary pressure drop on line in real time by using a known specific difference and angular difference measuring instrument of the secondary pressure drop.
2. The method for real-time online monitoring of the comprehensive error of the high-voltage electric energy metering device according to claim 1 is characterized in that: the real-time online monitoring method for the metering error of the high-voltage transformer is characterized in that the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device comprises the following steps: the method comprises the steps of simultaneously measuring or detecting the voltage value and the current value of the secondary side of the high-voltage transformer on the secondary side of the high-voltage transformer in real time on line by adopting a measuring or detecting instrument with precision, wherein the ratio of the two values is the secondary load value of the high-voltage transformer, and then calculating according to a mathematical formula to obtain the measuring error of the high-voltage transformer, wherein the mathematical formula is as follows:
Figure C2007101301210003C19
Figure C2007101301210003C20
in the formula: f. ofU、δU-specific and angular differences of the measured high voltage transformers under actual operating loads;
f0、δ0-a measured dead-weight ratio difference and a measured dead-weight angle difference;
fH、δH-the specific and angular differences at rated load that have been measured beforehand;
IX-secondary current of the high voltage potential transformer under actual operating load;
IH-a secondary current at rated load that has been measured in advance;
-the impedance angle of the actual operating load, i.e. the phase angle between the secondary voltage and the secondary current of the high voltage potential transformer;
Figure C2007101301210004C2
-an impedance angle at rated load that has been measured in advance;
(%) -calculation results: percent;
(') -calculation: the unit is minutes.
3. The method for real-time online monitoring of the comprehensive error of the high-voltage electric energy metering device according to claim 1 is characterized in that: the real-time online monitoring method for the metering error of the high-voltage transformer is selected as follows:
a. the real-time online monitoring method for the metering error of the high-voltage transformer comprises the following steps: a metering or detecting instrument with precision is adopted and arranged on the secondary side of the high-voltage transformer to simultaneously meter or detect the voltage value and the current value of the secondary side of the high-voltage transformer on line in real time, the voltage value is collected at the root of the secondary side, and the current value can be detected at any position in front of the load of the secondary side;
b. at least one special instrument for measuring or detecting voltage and current and its detecting accessories are used to simultaneously measure or detect the secondary side voltage value and current value of the high voltage transformer on line in real time, and the sampled or detected voltage and current information is collected to the measuring or detecting instrument of its precision in real time, without error or with negligible error in a wired transmission or wireless transmission/reception mode, and the detecting instrument is provided with a calculating mechanism to calculate the secondary side voltage value and current value according to the mathematical formula:
Figure C2007101301210004C3
calculating to obtain a metering error value of the high-voltage transformer; or,
c. the precision metering or detecting instrument transmits the sampled or detected voltage and current information to other computing mechanisms in a wired transmission or wireless transmission/receiving mode in real time without error or with negligible error according to a mathematical formula:
Figure C2007101301210004C5
Figure C2007101301210004C6
and calculating to obtain a metering error value of the high-voltage transformer.
4. The method for real-time online monitoring of the comprehensive error of the high-voltage electric energy metering device according to claim 1 is characterized in that: the real-time online monitoring method for the metering error of the high-voltage current transformer is characterized in that the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device comprises the following steps: the current amplitude and phase information of the primary side and the secondary side of the high-voltage current transformer to be measured are simultaneously measured or detected on line in real time by adopting a special measuring or detecting instrument, the respectively measured or detected current amplitude and phase information are collected to two or any one special measuring or detecting instrument in a sampling, wired transmission or wireless transmission/reception mode, and the difference of the values is the measuring error value of the high-voltage current transformer comprising the specific difference and the angular difference information.
5. The method for real-time online monitoring of the comprehensive error of the high-voltage electric energy metering device according to claim 1 is characterized in that: the method for real-time online metering or detecting the current amplitude and phase value of the primary side and the secondary side of the high-voltage current transformer to be detected simultaneously comprises the following steps:
a. the method comprises the steps that a special instrument for metering or detecting current amplitude values and phase values is arranged on a primary side and a secondary side of a high-voltage current transformer to be measured, and the current amplitude values and the phase values of primary side high voltage and secondary side mutual inductance of the high-voltage current transformer are simultaneously metered or detected on line in real time;
b. the method comprises the steps of simultaneously measuring or detecting the current amplitude and the phase value of primary side high voltage and secondary side mutual inductance of the high-voltage current transformer on line in real time by adopting at least one special instrument for measuring or detecting the current amplitude and the phase value and a detection accessory thereof, and collecting the sampled or detected current amplitude and phase value information to the special measuring or detecting instrument thereof in a wired transmission or wireless transmission/receiving mode in real time without error or with negligible error through the detection accessory thereof so as to measure the measuring error of the high-voltage current transformer.
6. The method for monitoring the comprehensive error of the high-voltage electric energy metering device in real time on line according to claim 2 or 4 is characterized in that:
1) the real-time online monitoring method for the metering error of the high-voltage transformer is selected as follows:
a. the method for collecting the sampled or detected voltage and current information to the metering or detecting instrument with the accuracy in a real-time, error-free or error-negligible manner in a wired transmission mode is as follows: the detection accessory and the cable of the measuring or detecting instrument with the precision have fixed known detection error values and deduct the fixed known detection error values, and the fixed known detection error values are free from errors in the measurement; or,
b. the method for collecting the sampled or detected voltage and current information to the metering or detecting instrument with the precision in a wired transmission or wireless transmission/receiving mode in real time without errors or with negligible errors comprises the following steps: the voltage and current information sampled or detected by the detecting accessory of the measuring or detecting instrument with the precision is digitally processed, and then is gathered on the measuring or detecting instrument with the precision or in a computing mechanism by a wired transmission or wireless transmission/receiving method without error or with negligible error.
2) The real-time online monitoring method for the metering error of the high-voltage current transformer is selected as follows: the method for collecting the sampled or detected current amplitude value and phase value information to the special metering or detecting instrument in a wired transmission or wireless transmission/receiving mode in real time without error or with negligible error comprises the following steps:
a. the method for collecting the sampled or detected current amplitude value and phase value information to the special metering or detecting instrument in real time without error or with negligible error in a wired transmission mode comprises the following steps: the detection accessory and the cable of the special metering or detecting instrument have fixed known detection error values and deduct the fixed known detection error values, and the fixed known detection error values are free from errors in the metering; or,
b. the method for collecting the sampled or detected current amplitude value and phase value information to the special metering or detecting instrument in a wired transmission or wireless transmission/receiving mode in real time without error or with negligible error comprises the following steps: the current amplitude and phase value information sampled or detected by the detection accessory of the special metering or detecting instrument is digitalized and then collected to the special metering or detecting instrument in a wired transmission or wireless transmission/receiving way without error or with negligible error.
7. The method for real-time online monitoring of the comprehensive error of the high-voltage electric energy metering device according to claim 1, 2 or 4, is characterized in that: the selection scheme of the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device is as follows:
1) the method for selecting the metering or detecting instrument with the precision adopted by the method for monitoring the metering error of the high-voltage transformer in real time on line comprises the following steps: the real-time online monitoring device for the metering error of the high-voltage transformer is designed and manufactured by adopting the real-time online monitoring method for the metering error of the high-voltage transformer, the main part of the device comprises a mechanism and a structure for accurately metering or detecting voltage and current information, and the device is characterized in that: the device is provided with or comprises at least one detection accessory for detecting voltage and current information in real time without error or with negligible error, wherein the detection accessory is a detection end or/and a branch machine:
a. the device or/and at least one detection end and cable thereof are provided with at least one piece of voltage and current metering or detecting information; and/or the first and/or second light sources,
b. the device or/and have at least one wired transmission or/and send the mechanism of the voltage and current information measured or detected wirelessly, the mechanism is made up of electronic mechanism, the mechanism is linked with body part of the device through the wired cable that transmits, or send/receive and contact through the wireless, these mechanisms are the separate body parts set up outside body part of the device, form the extension of the device, the extension is made up of body and electronic mechanism in it;
c. the calculation mechanism for calculating the measurement error of the high-voltage transformer by the sampled or detected voltage and current information according to a mathematical formula is selected as follows: a calculating mechanism is arranged on an instrument for measuring the precision or detecting the voltage and current information or a high-voltage transformer measuring error real-time online monitoring device, or other computers or calculating mechanisms of a calculating center are adopted.
2) The method for selecting the special metering or detecting instrument adopted by the method for monitoring the metering error of the high-voltage current transformer in real time on line is as follows: the real-time on-line monitoring method for the metering error of the high-voltage current transformer is adopted to design and manufacture the real-time on-line monitoring device for the metering error of the high-voltage current transformer, the main part of the device comprises a mechanism and a structure special for metering or detecting the information of the current amplitude and the phase value, and the device is characterized in that: the device is provided with or comprises at least one detection accessory for detecting current amplitude value and phase value information in real time without error or with negligible error, wherein the detection accessory is a detection terminal or/and a branch machine:
a. the device or/and a detection end with at least one piece of information of measuring or detecting current amplitude value and phase value and a cable thereof; and/or the first and/or second light sources,
b. the device or/and the mechanism with at least one wired transmission or/and wireless transmission of information of the current amplitude and phase values measured or detected, the mechanism is composed of electronic mechanisms, the mechanism is connected with the main body part of the device through a wired cable for transmission or wirelessly transmits/receives, the mechanisms are split parts arranged outside the main body part of the device, and form a sub-set of the device, and the sub-set is composed of a shell and the electronic mechanisms inside the shell.
8. The method for real-time online monitoring of the comprehensive error of the high-voltage electric energy metering device according to claim 1, 2 or 4, is characterized in that: the real-time online monitoring method for the comprehensive error of the high-voltage electric energy metering device has the following selection schemes: the real-time online monitoring method for the metering error of the high-voltage transformer is adopted to design and manufacture the real-time online monitoring device for the metering error of the high-voltage transformer, the real-time online monitoring device for the metering error of the high-voltage current transformer is designed and manufactured by adopting the real-time online monitoring method for the metering error of the high-voltage current transformer, and the two devices are integrated into a high-voltage electric energy metering device comprehensive error real-time online monitoring device, the main body part of the device comprises a mechanism and a structure for accurately metering or detecting voltage and current information, a mechanism and a structure for specially metering or detecting current amplitude and phase value information, and a mechanism and a structure for metering or detecting electric energy, and the device is characterized in that:
1) the device must comprise or be provided with at least one detection accessory for detecting voltage and current information in real time, without error or with negligible error, must comprise or be provided with at least one detection accessory for detecting current amplitude and phase information in real time, without error or with negligible error, and must comprise or be provided with at least one detection accessory for detecting electric energy metering information in real time, without error or with negligible error; or the device must include or have at least one detection accessory for detecting voltage and current information, current amplitude and phase value information and electric energy metering information in real time without error or with negligible error, which are all detection terminals or/and extension sets:
a. the device or/and at least one measuring end and cable thereof with at least one measuring or detecting voltage and current information, or/and at least one measuring or detecting current amplitude value and phase value information, or/and at least one measuring end and cable thereof with at least one measuring information of the detected electric energy, or/and at least one comprehensive measuring end and cable thereof which are jointly formed by the measuring or detecting voltage and the detecting end; and/or the first and/or second light sources,
b. the device or/and means for wired or/and wireless transmission of the measured or detected voltage and current information, or/and means with at least one wired transmission or/and wireless transmission of information of the measured or detected current amplitude and phase values, or/and at least one device for wired or/and wireless transmission of the detected energy metering information, or/and at least one integrated detection device formed by the above devices, these means are constituted by electronic means, which are connected to the main part of the device by means of wired cables for transmission or by means of wireless transmission/reception, the mechanisms are split parts arranged outside the main body part of the equipment and form the sub-units of the equipment, and the sub-units consist of a shell and electronic mechanisms inside the shell;
2) the structure of the device, either wired transmission or wireless transmission/reception with a computing center, is: the structure that the device or/and at least one computing center are in wired transmission connection or wireless sending/receiving connection is as follows:
a. the structure of the device and the connected mechanism for wire transmission of the detected voltage and current information, current amplitude value and phase value information and their comprehensive information between the computing center is as follows: the structure of the mechanism for the wired transmission of the detected voltage and current information, current amplitude value and phase value information and the comprehensive information of the information is formed by connecting a digital processing circuit, a wired transmission interface circuit and a transmission cable one by one; or,
b. the structure of the device and the related computing center for wirelessly transmitting/receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof is as follows: the structure of the mechanism for wirelessly transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof by the equipment is formed by connecting a digital processing circuit, a wireless interactive interface circuit and a transmitting antenna function thereof; the calculating center connected with the device is correspondingly provided with a mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof, and the receiving mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof is arranged in the calculating center and is formed by functionally connecting the voltage and current information, the current amplitude value and phase value information and the comprehensive information receiving antenna thereof and a wireless interactive interface circuit.
9. The utility model provides a real-time on-line monitoring equipment of high-voltage electric energy metering device composite error, the main part of this equipment is including the mechanism and the structure of precision measurement or detection voltage and current information-high-voltage potential transformer measurement error real-time on-line monitoring part promptly, including the mechanism and the structure of special measurement or detection current amplitude and phase value information-high-voltage potential transformer measurement error real-time on-line monitoring part promptly, still including the real-time on-line monitoring part of high-voltage potential transformer secondary circuit pressure drop, the real-time on-line monitoring part of measurement error of electric energy meter, characterized in that:
1) the device must comprise or be equipped with at least one real-time, error-free or error-negligible detection accessory, said detection accessories being the detection terminals or/and the extensions:
a. the device or/and at least one measuring end and cable thereof with at least one measuring or detecting voltage and current information, or/and at least one measuring or detecting current amplitude value and phase value information, or/and at least one measuring end and cable thereof with at least one measuring information of the detected electric energy, or/and at least one comprehensive measuring end and cable thereof which are jointly formed by the measuring or detecting voltage and the detecting end; and/or the first and/or second light sources,
b. the device or/and means for wired or/and wireless transmission of the measured or detected voltage and current information, or/and means with at least one wired transmission or/and wireless transmission of information of the measured or detected current amplitude and phase values, or/and at least one device for wired or/and wireless transmission of the detected energy metering information, or/and at least one integrated detection device formed by the above devices, these means are constituted by electronic means, which are connected to the main part of the device by means of wired cables for transmission or by means of wireless transmission/reception, the mechanisms are split parts arranged outside the main body part of the equipment and form the sub-units of the equipment, and the sub-units consist of a shell and electronic mechanisms inside the shell;
2) the equipment is provided with a calculation mechanism and a calculation structure selectively, wherein the calculation mechanism comprises a microcomputer or a microprocessor, a software program thereof and an auxiliary circuit;
a. the device calculates the sampled or detected voltage and current information according to a mathematical formula to obtain a metering error value of the high-voltage transformer monitored on line in real time, wherein the mathematical formula is as follows:
Figure C2007101301210009C2
in the formula: f. ofU、δU-specific and angular differences of the measured high voltage transformers under actual operating loads;
f0、δ0-a measured dead-weight ratio difference and a measured dead-weight angle difference;
fH、δH-the specific and angular differences at rated load that have been measured beforehand;
IX-secondary current of the high voltage potential transformer under actual operating load;
IH-a secondary current at rated load that has been measured in advance;
Figure C2007101301210009C3
-the impedance angle of the actual operating load, i.e. the phase angle between the secondary voltage and the secondary current of the high voltage potential transformer;
Figure C2007101301210009C4
-an impedance angle at rated load that has been measured in advance;
(%) -calculated as a percentage;
(') -the unit of calculation is a point;
b. the device calculates each error of sampling or detection in real time according to a mathematical formula to obtain a comprehensive error value of the high-voltage electric energy metering device; for a three-phase three-wire system, the mathematical formula is:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Uab</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>ab</mi> </msub> <msub> <mrow> <mo>+</mo> <mi>f</mi> </mrow> <mi>Ia</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>3</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ucb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>cb</mi> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ic</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C2007101301210010C1
in the formula: epsilon- -the composite error of the high voltage electric energy metering device;
εW1、εW3-relative error (%) of the first and third phase power meters;
P′1、P ′3-the measured ac power (energy) values of the first and third phase power meters;
fUab、δUabAB phase voltage transformer (or secondary line voltage of voltage transformer)
Figure C2007101301210010C2
) The ratio difference (%) and the angle difference (');
fUcb、δUcbCB phase voltage transformers (or secondary line voltages of voltage transformers)
Figure C2007101301210010C3
) The ratio difference (%) and the angle difference (');
fIa、δIa-specific and angular differences (%) and (') of the a-phase current transformers;
fIc、δIc-specific and angular differences (%) and (') of the C-phase current transformers;
fab、δab-specific and angular differences (%) of the AB phase voltage secondary circuit pressure drops;
fcb、δcb-specific and angular differences (%) of the CB phase voltage secondary circuit voltage drops;
(%) -ratio difference: percent;
(') -angular difference: the unit is minutes;
Figure C2007101301210010C4
Figure C2007101301210010C5
respectively are
Figure C2007101301210010C6
And
Figure C2007101301210010C7
in the middle of the furnace, the gas-liquid separation chamber,
Figure C2007101301210010C8
and
Figure C2007101301210010C9
the phase angle between;
Figure C2007101301210010C11
-AB phase voltage at the energy meter and CB phase voltage at the energy meter;
Figure C2007101301210010C12
Figure C2007101301210010C13
-a secondary current phasor;
for a three-phase four-wire system, the mathematical formula is:
<math> <mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>3</mn> </msub> </mrow> </mfrac> <mo>&times;</mo> <mo>{</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>1</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ua</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <mrow> <msub> <mi>f</mi> <mrow> <mi>a</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ia</mi> </msub> </mrow> <mo>)</mo> </mrow> <mo>+</mo> <msub> <msup> <mi>P</mi> <mo>&prime;</mo> </msup> <mn>2</mn> </msub> <mo>&times;</mo> <mrow> <mo>(</mo> <msub> <mi>&epsiv;</mi> <mrow> <mi>W</mi> <mn>2</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>Ub</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mrow> <mi>b</mi> <mn>0</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>f</mi> <mi>Ib</mi> </msub> <mo>)</mo> </mrow> </mrow> </math>
Figure C2007101301210010C15
Figure C2007101301210010C16
Figure C2007101301210010C17
in the formula: epsilon- -the composite error of the high voltage electric energy metering device;
εW1、εW2、εW3-errors (%) of the first, second and third phase power meters;
fIa、δIa、fIb、δIb、fIc、δIc-specific differences (%) and angular differences (') of phase a, phase B, phase C current transformers;
fUa0、δUa0、fUb0、δUb0、fUc0、δUc0the specific difference (%) and the angular difference (') of the phase A, the phase B and the phase C voltage transformers;
fa0、δa0、fb0、δb0、fc0、δc0-specific and angular differences (%) and (') of the voltage drops of the A, B, C phase voltage secondary circuits, respectively;
P′1、P′2、P′3-the ac power electric energy values measured by the power electric energy meters of the respective phases;
Figure C2007101301210011C1
Figure C2007101301210011C2
Figure C2007101301210011C3
respectively areAndin the middle of the furnace, the gas-liquid separation chamber,
Figure C2007101301210011C6
and
Figure C2007101301210011C7
in the middle of the furnace, the gas-liquid separation chamber,and
Figure C2007101301210011C9
the phase angle between;
Figure C2007101301210011C11
Figure C2007101301210011C12
-a phase voltage at the electric energy meter, a phase voltage at the electric energy meter;
Figure C2007101301210011C13
Figure C2007101301210011C14
Figure C2007101301210011C15
-secondary current phasor.
10. The high-voltage electric energy metering device comprehensive error real-time on-line monitoring equipment of claim 9 is characterized in that: the detailed structure of the high-voltage electric energy metering error real-time on-line monitoring equipment of the equipment comprises:
a. the device or/and at least one detection end for detecting voltage and current information of the belt or/and at least one detection end for detecting current amplitude value and phase value information of the belt or/and at least one comprehensive detection end composed of the devices or/and the belt or/and the comprehensive detection end composed of the devices or/and the belt and the comprehensive detection: the cable is connected with the detection input end of the device and the voltage and current sampling detection end at the end part of the cable; the cable is connected with the detection input end of the device, and the current amplitude value and phase value sampling detection end of the end part of the cable; a cable connected to the detection input end of the device and a comprehensive detection end of the end thereof;
b. the device or/and at least one split or branch mechanism with wired transmission detection voltage and current information, or/and at least one split or branch mechanism with wired transmission detection current amplitude and phase value information, or/and at least one split or branch mechanism with wired transmission detection voltage and current information, current amplitude and phase value information integrated, the detailed structure of the voltage and current information, current amplitude and phase value information integrated mechanism with wired transmission detection between the branch and the device, current amplitude and phase value information mechanism with wired transmission detection between the branch and the device, and voltage and current information, current amplitude and phase value information integrated mechanism with wired transmission detection between the branch and the device is as follows: the device comprises a sampling circuit, a controller, an analog/digital conversion circuit, a transmission cable, an interface circuit, a connector and an input circuit, wherein the sampling circuit, the controller, the analog/digital conversion circuit, the transmission cable, the interface circuit, the connector and the input circuit are controlled by the voltage and current information, the current amplitude value and phase value information and comprehensive information of the voltage and current information, the current amplitude value and phase value information and the comprehensive information of the current amplitude value and phase value information;
c. at least one of said devices or/and belts wirelessly transmitting detected voltage and current informationMechanism, or/and at least one separate or extension mechanism with wireless transmission of detected current amplitude and phase information, or/and at least one separate or extension mechanism with wireless transmission of detected voltage and current information, current amplitude and phase information, or/and its extension mechanism with wireless transmission/reception of detected voltage and current information between its extension and the equipment, or its extension mechanism with wireless transmission/reception of detected current amplitude and phase information between its extension and the equipment
Figure C2007101301210011C16
The detailed structure of the information mechanism, the voltage and current information, the current amplitude value and the phase value information which are wirelessly transmitted/received and detected between the branch machine and the equipment is as follows: the voltage and current information, the current amplitude and phase value information, and the comprehensive information sampling circuit, the controller-controlled A/D conversion circuit, the transmitting circuit and the transmitting antenna function are connected to form an extension for wirelessly transmitting the detected voltage and current information, the current amplitude and phase value information, and the comprehensive information; the device is also provided with a mechanism for wirelessly receiving the detected voltage and current information, the detected current amplitude value and phase value information and the comprehensive information thereof, wherein the mechanism for wirelessly receiving the detected voltage and current information, the detected current amplitude value and phase value information and the comprehensive information thereof is arranged on the main body part of the device and is formed by functionally connecting a receiving circuit of the voltage and current information, the detected current amplitude value and phase value information and the comprehensive information thereof, a receiving antenna thereof, an amplifying circuit and an input circuit, and the input circuit is an input circuit of the voltage and current information, the detected current amplitude value and phase value information and the comprehensive information thereof of the device;
d. the structure of the device, wired transmission or wireless transmission/reception with a computing center is as follows: the structure that the device or/and at least one computing center are in wired transmission connection or wireless sending/receiving connection is as follows:
i. the structure of the device and the connected mechanism for wire transmission of the detected voltage and current information, current amplitude value and phase value information and their comprehensive information between the computing center is as follows: the structure of the mechanism for the wired transmission of the detected voltage and current information, current amplitude value and phase value information and the comprehensive information of the information is formed by connecting a digital processing circuit, a wired transmission interface circuit and a transmission cable one by one; or,
the specific structure of the mechanism for wireless transmission/reception of the detected voltage and current information, current amplitude and phase value information, and their integrated information between the device and the associated computing center is: the structure of the mechanism for wirelessly transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof by the equipment is formed by connecting a digital processing circuit, a wireless interactive interface circuit and a transmitting antenna function thereof; the calculating center connected with the device is correspondingly provided with a mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof, and the receiving mechanism for wirelessly receiving the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof is arranged in the calculating center and is formed by functionally connecting the voltage and current information, the current amplitude value and phase value information and the comprehensive information receiving antenna thereof and a wireless interactive interface circuit.
11. The high-voltage electric energy metering device comprehensive error real-time on-line monitoring equipment of claim 9 is characterized in that: the detailed structure of the high-voltage electric energy metering error real-time on-line monitoring equipment of the equipment comprises:
1) the device or/and at least one detection end for detecting voltage and current information of the belt or/and at least one detection end for detecting current amplitude value and phase value information of the belt or/and at least one comprehensive detection end composed of the devices or/and the belt or/and the comprehensive detection end composed of the devices or/and the belt or/and the comprehensive detection end are/is characterized in that: the detection cable of the detection end and the sampling detection end are provided with fixed structures;
2) the detailed structure of the device or/and the at least one split or branch mechanism with wired transmission of the detected voltage and current information, or/and the at least one split or branch mechanism with wired transmission of the detected current amplitude and phase value information, or/and the at least one split or branch mechanism with wired transmission of the detected voltage and current information, current amplitude and phase value information, or/and the mechanism with wired transmission of the detected voltage and current information, current amplitude and phase value information between the branch and the device, or/and the mechanism with wired transmission of the detected current amplitude and phase value information between the branch and the device, or/and the comprehensive mechanism with wired transmission of the detected voltage and current information, current amplitude and phase value information between the branch and the device, is as follows:
a. the structure of the mechanism for wired transmission of detected voltage and current information is formed by connecting a sampling circuit, an analog/digital conversion circuit controlled by a controller, a photoelectric isolation circuit, a differential output circuit, a transmission circuit, a differential input circuit, a photoelectric isolation circuit and an input circuit one by one; or,
b. the structure of the mechanism for wired transmission of detected voltage and current information, current amplitude and phase value information and comprehensive information thereof is formed by connecting a sampling circuit, an analog-to-digital conversion circuit controlled by a controller, an electro-optical conversion interface circuit, a transmission optical fiber, a photoelectric conversion interface circuit, an amplifying circuit and an input circuit one by one; or,
c. the structure of the mechanism for wired transmission of detected voltage and current information, current amplitude and phase value information and comprehensive information thereof is formed by connecting a digital sampling circuit, a digital amplification circuit (a), an electro-optical conversion interface circuit, a transmission optical fiber, a photoelectric conversion interface circuit, a digital amplification circuit (b) and a digital input circuit one by one; or,
d. the structure of the mechanism for the wired transmission of the detected voltage and current information is formed by a digital output end, a wired transmission cable and a digital input end;
3) the detailed structure of the device or/and at least one split or branch mechanism for wirelessly transmitting the detected voltage and current information, or/and at least one split or branch mechanism for wirelessly transmitting the detected current amplitude and phase value information, or/and at least one split or branch mechanism for wirelessly transmitting the detected voltage and current information, or/and current amplitude and phase value information, or/and the combination mechanism for wirelessly transmitting/receiving the detected voltage and current information, or/and current amplitude and phase value information, between the branch mechanism and the device, is:
a. the extension set for wirelessly transmitting detected voltage and current information, current amplitude value and phase value information and comprehensive information of the information is structurally composed of a sampling circuit, an analog/digital conversion circuit controlled by a controller, a digital processing module, a wireless data transmission communication module and a transmitting antenna of the wireless data transmission communication module in functional connection; the corresponding equipment is provided with a mechanism and a structure for wirelessly receiving detected voltage and current information, current amplitude value and phase value information and comprehensive information of the information, and the mechanism and the structure are formed by functionally connecting a wireless data transmission communication module and a receiving antenna thereof, a digital processing module and an input circuit; or,
b. the extension set for wirelessly transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information thereof is structurally composed of a sampling circuit, an analog/digital conversion circuit controlled by a controller, a digital modulation circuit, a frequency conversion transmitting circuit and a transmitting antenna thereof in functional connection; the corresponding equipment is provided with a mechanism and a structure for wirelessly receiving detected voltage and current information, current amplitude value and phase value information and comprehensive information of the information, and the mechanism and the structure are formed by functionally connecting a receiving and frequency conversion circuit, a receiving antenna of the receiving and frequency conversion circuit, a digital demodulation circuit and an input circuit; or,
c. the extension set for wirelessly transmitting the detected voltage and current information, the current amplitude value and phase value information and the comprehensive information of the information is structurally composed of a digital sampling circuit, a digital amplifying circuit and a transmitting antenna thereof in functional connection; the corresponding equipment has the mechanism and structure for wirelessly receiving the detected voltage and current information, current amplitude and phase value information and the comprehensive information thereof, and is formed by functionally connecting a digital receiving and amplifying circuit, a receiving antenna thereof and a digital input circuit.
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