CN101251585A - Method and apparatus for checking global error of high voltage energy metering installation - Google Patents

Method and apparatus for checking global error of high voltage energy metering installation Download PDF

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Publication number
CN101251585A
CN101251585A CNA2008100877821A CN200810087782A CN101251585A CN 101251585 A CN101251585 A CN 101251585A CN A2008100877821 A CNA2008100877821 A CN A2008100877821A CN 200810087782 A CN200810087782 A CN 200810087782A CN 101251585 A CN101251585 A CN 101251585A
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CN
China
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voltage
current
energy
signal
standard
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CNA2008100877821A
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Chinese (zh)
Inventor
侯铁信
卜正良
徐芝贵
张乐平
郭琳云
杨晓伟
李优仪
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武汉国测科技股份有限公司
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Priority to CNA2008100877821A priority Critical patent/CN101251585A/en
Publication of CN101251585A publication Critical patent/CN101251585A/en

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Abstract

The invention relates to an overall error checking method and device of a high voltage electric energy metering device, wherein the device comprises a high-voltage heavy-current testing power source, a checking object, a testing power source stability degree control circuit, a monitoring unit and a benchmark electric energy measuring unit, wherein the high-voltage heavy-current testing power source is used to provide stable and reliable high-voltage heavy-current testing signal; the checking object, which is a high-voltage electric energy metering device, obtains the high-voltage heavy-current signal and generates detecting electric energy value; the testing power source stability degree control circuit is used to detect the amplitude and the phase of the voltage and the current of the high-voltage heavy-current testing signal; the monitoring unit sets needed detecting flow, testing voltage, current and power factor, and obtains the detecting result of the testing power source stability degree control circuit to control the output state of the high-voltage heavy-current testing power source; the benchmark electric energy measuring unit, which obtains the high-voltage heavy-current signal and generates a standard electric energy value, compares the standard electric energy value with the detecting electric energy value at the same time to obtain wattful or wattless electric energy measuring error.

Description

Global error of high voltage energy metering installation method of calibration and device

Technical field

What the present invention relates to is a kind of calibration technology of electric power metering device, particularly be a kind of global error of high voltage energy metering installation method of calibration and device.

Background technology

Existing method for the high-voltage electric-energy meter verification is the various piece to device, comprise that voltage transformer (VT), current transformer, multifunctional electric energy meter and secondary line voltage drop of voltage mutual inductor detect respectively, obtain the error of various piece, control the accuracy of measuring by the composition error computing method then.Yet can not demarcate the global error precision of measuring apparatus like this by the result of Theoretical Calculation, the measuring accuracy of high-voltage electric-energy meter integral body does not have direct detection method to determine.Simultaneously, along with the appearance of high-voltage electric energy meter, the design that this novel high pressure measurement device adopts mutual inductor and electric energy meter to combine together can only adopt the method for the whole verification of high pressure to examine and determine., the method that does not also have to carry out high-voltage electric-energy meter whole verification at present.

In view of above-mentioned defective, creator of the present invention has obtained method and the device that this creation can be directly carried out the global error verification to high-voltage electric-energy meter or high-voltage electric energy meter finally through research and practice for a long time.

Summary of the invention

The objective of the invention is to, a kind of global error of high voltage energy metering installation method of calibration and device are provided, in order to overcome above-mentioned defective.

For achieving the above object, the technical solution used in the present invention is, a kind of global error of high voltage energy metering installation method of calibration at first is provided, and it step that comprises is:

Step a: set in advance at least one group of high voltage and big current signal;

Step b:, generate a corresponding standard energy value by obtaining every group of high voltage and big current signal corresponding voltage value and current value;

Step c: described high-voltage electric-energy meter obtains described every group of high voltage and big current signal and generates to detect energy value;

Steps d: on the same group described standard energy value and described detection energy value are compared, obtain meritorious or reactive energy error in dipping;

Preferable, described high voltage and big current signal by with low voltage voltage signal, little current signal through boosting and up-flow is handled the back and obtained;

Preferable, also comprise step a ' between step a and the step b: detect the described high voltage and the voltage of big current signal, the amplitude and the phase place of electric current, and compare, thereby adjust high voltage and big current signal with the parameter that sets in advance;

Next provides a kind of global error of high voltage energy metering installation calibration equipment, and in order to realize above-mentioned global error of high voltage energy metering installation method of calibration, it comprises:

One high-voltage great-current experiment power supply is in order to provide stable and reliable high-voltage great-current test signal;

One verification object, it is a high-voltage electric-energy meter, it obtains described high-voltage great-current signal, and produces detection energy value;

One experiment power supply degree of stability control circuit is in order to detect described high-voltage great-current test signal voltage, the amplitude of electric current and the result of phase place;

One monitoring unit, it is provided with testing process, trial voltage, electric current and the power factor that needs, and obtains the testing result of described experiment power supply degree of stability control circuit simultaneously, in order to control the output state of described high-voltage great-current experiment power supply;

One benchmark electric energy measurement unit, it obtains described high-voltage great-current signal, and the energy value of the standard of generation, simultaneously described standard energy value and described detection energy value is compared, thereby obtains meritorious or reactive energy error in dipping;

Preferable, described high-voltage great-current experiment power supply comprises:

One signal source is in order to produce the low voltage voltage current signal;

One voltage power amplifier and current power amplifier are connected respectively at described signal source, and low voltage voltage signal and little current signal are carried out power amplification;

One stepup transformer and a current lifting device are connected with described voltage power amplifier and current power amplifier respectively, in order to produce described high-voltage great-current test signal;

Preferable, described benchmark electric energy measurement unit, it comprises standard current transformer and the standard potential transformer that is connected on the described high-voltage great-current experiment power supply output line, both obtain described electric current and voltage reference value respectively;

One standard electric energy meter, it is connected with standard potential transformer with described standard current transformer respectively, obtain described current value and magnitude of voltage, and produce described standard energy value, the sign that receives described high-voltage electric-energy meter output simultaneously detects the pulse signal of energy value, both are compared, obtain meritorious or reactive energy error in dipping;

Preferable, described experiment power supply degree of stability control circuit is connected with described standard current transformer and standard potential transformer respectively, and it comprises: voltage, electric current, phase detecting circuit and power supply regulator circuit.

Beneficial effect of the present invention compared with the prior art is, solved the problem that high-voltage electric-energy meter can't carry out the global error verification, can carry out whole verification to high-voltage electric-energy meter and high-voltage electric energy meter, make the high pressure measurement device have whole measuring accuracy, avoid detecting respectively under the classic method complicated processes of electric energy meter, mutual inductor, secondary circuit, improved verification efficient greatly.

Description of drawings

Fig. 1 is the process flow diagram of global error of high voltage energy metering installation method of calibration of the present invention;

Fig. 2 is the allomeric function structured flowchart of global error of high voltage energy metering installation calibration equipment of the present invention;

Fig. 3 is the functional block diagram of global error of high voltage energy metering installation calibration equipment mesohigh cranking test power supply of the present invention;

Fig. 4 is the functional block diagram of benchmark electric energy measurement unit in the global error of high voltage energy metering installation calibration equipment of the present invention.

The flow process of description of reference numerals: a~d-the inventive method; 1-high-voltage great-current experiment power supply; The 11-signal source; 12-voltage power amplifier; The 13-current power amplifier; The 14-stepup transformer; The 15-current lifting device; 2-benchmark power test unit; The 21-standard potential transformer; The 22-standard current transformer; The 23-standard electric energy meter; The 3-high-voltage electric-energy meter; 4-experiment power supply degree of stability control circuit; The 5-monitoring unit.

Embodiment

Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.

See also shown in Figure 1ly, it is for the process flow diagram of global error of high voltage energy metering installation method of calibration of the present invention; It step that comprises is:

Step a: set in advance at least one group of high voltage and big current signal;

Step a ': detect the described high voltage and the voltage of big current signal, the amplitude and the phase place of electric current, and compare, thereby adjust high voltage and big current signal with the parameter that sets in advance;

Step b:, generate a corresponding standard energy value by obtaining every group of high voltage and big current signal corresponding voltage value and current value;

Step c: described high-voltage electric-energy meter obtains described every group of high voltage and big current signal and generates to detect energy value;

Steps d: on the same group described standard energy value and described detection energy value are compared, obtain meritorious or reactive energy error in dipping;

Wherein, described high voltage and big current signal by with low voltage voltage signal, little current signal through boosting and up-flow is handled the back and obtained.

See also shown in Figure 2ly, it is for the allomeric function structured flowchart of global error of high voltage energy metering installation calibration equipment of the present invention; In order to realize above-mentioned global error of high voltage energy metering installation method of calibration, it comprises:

One high-voltage great-current experiment power supply 1 is in order to provide stable and reliable high-voltage great-current test signal;

One verification object, it is a high-voltage electric-energy meter 3, it obtains described high-voltage great-current signal, and produces detection energy value;

One experiment power supply degree of stability control circuit 4, it is in order to detect the amplitude and the phase place situation of described high-voltage great-current test signal voltage, electric current;

One monitoring unit 5, it is provided with testing process, trial voltage, electric current and the power factor that needs, and obtains the testing result of described experiment power supply degree of stability control circuit 4 simultaneously, in order to control the output state of described high-voltage great-current experiment power supply 1;

One benchmark electric energy measurement unit 2, it obtains described high-voltage great-current signal, and the energy value of the standard of generation, simultaneously described standard energy value and described detection energy value is compared, thereby obtains meritorious or reactive energy error in dipping;

Wherein, described monitoring unit 5 is provided with testing process, trial voltage, electric current and the power factor of needs according to described testing requirements and sends to the processor of described high-voltage great-current experiment power supply 1, and detect the amplitude of high-voltage great-current signal voltage, electric current and the result of phase place according to described experiment power supply degree of stability control circuit 4 automatically, described high-voltage great-current experiment power supply 1 is adjusted, made described high-voltage great-current experiment power supply 1 output satisfy the test signal of test stability and reliability requirement; Correlation parameter by 5 pairs of described benchmark electric energy measurements of described monitoring unit unit 2 is provided with simultaneously, output pulses by described high-voltage electric-energy meter 3 outputs, by comparing and obtain the error in dipping of meritorious or reactive energy in described benchmark electric energy measurement unit 2, and the result is sent to described monitoring unit 5 show, preserve.

See also shown in Figure 3, it is for the functional block diagram of global error of high voltage energy metering installation calibration equipment mesohigh cranking test power supply of the present invention, described high-voltage great-current experiment power supply 1 comprises: a signal source 11, one voltage power amplifier 12 and current power amplifier 13 are connected with described signal source 11 respectively, one stepup transformer 14 and a current lifting device 15 are connected with described voltage power amplifier 12 and current power amplifier 13 respectively, in order to export described high-voltage great-current test signal; The process of its work is: by described signal source 11 output LOW voltages, little current signal, and through described voltage power amplifier 12, current power amplifier 13 obtains the voltage and current signal of certain power, the high tension voltage that described voltage signal needs by described stepup transformer 14 output tests, described current signal is by the big current signal of described current lifting device 15 outputs, described current lifting device 15 has taken into full account its insulating capacity when design, as under the 10kV electric pressure, can guarantee that it stands lightning impulse 75kV and industrial frequency withstand voltage 42kV, make to bear between its high-low pressure and apply maximum trial voltage for a long time, therefore can be at described stepup transformer 14, the output terminal of current lifting device 15 links to each other, thereby the supply voltage of output depends on described stepup transformer 14 outputs, electric current depends on current lifting device 15 outputs, obtains the equivalent high-voltage great-current experiment power supply 1 that can control.Because the capacity of voltage segment only need be considered the voltage circuit power consumption of described benchmark electric energy measurement unit 2, tested electric energy metered system, the loss and the test loop loss of stepup transformer 14, the capacity of current segment only need be considered the current return power consumption and the test loop loss of described current lifting device 15 losses, tested electric energy metered system, thereby as long as provide very little power just can meet the demands respectively, described signal source 11 will receive corresponding feedback signal simultaneously, and voltage, current amplitude and the phase place of output signal are adjusted.

See also shown in Figure 4ly, it is the functional block diagram of benchmark electric energy measurement unit in the global error of high voltage energy metering installation calibration equipment of the present invention; Described benchmark electric energy measurement unit, it comprises standard current transformer 22 and the standard potential transformer 21 that is connected on described high-voltage great-current experiment power supply 1 output line, and both obtain electric current and voltage reference value in the described high-voltage great-current test signal respectively;

One standard electric energy meter 23, it is connected with standard potential transformer 21 with described standard current transformer 22 respectively, obtain described current value and magnitude of voltage, and processing produces described standard energy value, the sign that receives described high-voltage electric-energy meter 3 outputs simultaneously detects the pulse signal of energy value, both are compared, obtain meritorious or reactive energy error in dipping.

High-voltage signal when the described high-voltage great-current experiment power supply 1 of described standard potential transformer 21 samplings, the big current signal of described standard current transformer 22 sampling high-voltage great-current experiment power supplies 1, then the signal of described standard potential transformer 21 and the signal of standard current transformer 22 are sent to standard electric energy meter 23 respectively, obtain standard energy value.Therefore, as long as guarantee the accuracy of described standard potential transformer 21, standard current transformer 22 and described standard electric energy meter 23, just can guarantee the accuracy of whole verification, the accuracy class of for example described standard potential transformer 21 is 0.02 grade, the class of accuracy of described standard current transformer 22 is the 0.02S level, the class of accuracy of described standard electric energy meter 23 is 0.05 grade, just can be with the benchmark power measuring system of this system as 0.5S level high-voltage electric-energy meter 3.

Need to prove that this method and device can be used for various high-voltage electric-energy meters, add electric energy meter system as electric metering box, combined instrument transformer adds electric energy meter system, the integrated high-pressure electric energy meter, electronic mutual inductor adds digital electric energy meter system and weak signal output mutual inductor adds weak signal input electric energy meter system etc., both be applicable to the high-voltage electric-energy meter 3 of verification phase three-wire three two elements method metering, also be applicable to the high-voltage electric-energy meter 3 of verification three-phase and four-line three element method metering, both be applicable to laboratory high-voltage electric energy measurement check system verification, also be applicable to the high-voltage electric energy measurement field-checking.

The above only is preferred embodiment of the present invention, only is illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that claim of the present invention limited, revise, even equivalence, but all will fall within the scope of protection of the present invention.

Claims (7)

1, a kind of global error of high voltage energy metering installation method of calibration is characterized in that, it step that comprises is:
Step a: set in advance at least one group of high voltage and big current signal;
Step b:, generate a corresponding standard energy value by obtaining every group of high voltage and big current signal corresponding voltage value and current value;
Step c: described high-voltage electric-energy meter obtains described every group of high voltage and big current signal and generates to detect energy value;
Steps d: on the same group described standard energy value and described detection energy value are compared, obtain meritorious or reactive energy error in dipping.
2, global error of high voltage energy metering installation method of calibration according to claim 1 is characterized in that, described high voltage and big current signal by with low voltage voltage signal, little current signal through boosting and up-flow is handled the back and obtained.
3, global error of high voltage energy metering installation method of calibration according to claim 1, it is characterized in that, also comprise step a ' between step a and the step b: detect the described high voltage and the voltage of big current signal, the amplitude and the phase place of electric current in real time, and compare, thereby adjust high voltage and big current signal with the parameter that sets in advance.
4, a kind of global error of high voltage energy metering installation calibration equipment in order to realize above-mentioned global error of high voltage energy metering installation method of calibration, is characterized in that it comprises:
One high-voltage great-current experiment power supply is in order to provide stable and reliable high-voltage great-current test signal;
One verification object, it is a high-voltage electric-energy meter, it obtains described high-voltage great-current signal, and produces detection energy value;
One experiment power supply degree of stability control circuit is in order to the amplitude that detects voltage, electric current in the described high-voltage great-current test signal and the result of phase place;
One monitoring unit, it is provided with testing process, trial voltage, electric current and the power factor that needs, and obtains the testing result of described experiment power supply degree of stability control circuit simultaneously, in order to control the output state of described high-voltage great-current experiment power supply;
One benchmark electric energy measurement unit, it obtains described high-voltage great-current signal, and the energy value of the standard of generation, simultaneously described standard energy value and described detection energy value is compared, thereby obtains meritorious or reactive energy error in dipping.
5, global error of high voltage energy metering installation calibration equipment according to claim 4 is characterized in that, described high-voltage great-current experiment power supply comprises:
One signal source is in order to produce low voltage voltage, current signal;
An one voltage power amplifier and a current power amplifier are connected with described signal source respectively, and low voltage voltage signal and little current signal are carried out power amplification;
One stepup transformer and a current lifting device are connected with described voltage power amplifier and current power amplifier respectively, in order to produce described high-voltage great-current test signal.
6, global error of high voltage energy metering installation calibration equipment according to claim 5, it is characterized in that, described benchmark electric energy measurement unit, it comprises standard current transformer and the standard potential transformer that is connected on the described high-voltage great-current experiment power supply output line, and both obtain its electric current and voltage reference value respectively;
One standard electric energy meter, it is connected with standard potential transformer with described standard current transformer respectively, obtain described current value and magnitude of voltage, and calculating produces described standard energy value, receive the pulse signal that detects energy value by the sign of described high-voltage electric-energy meter output simultaneously, and both are compared, obtain meritorious or reactive energy error in dipping.
7, global error of high voltage energy metering installation calibration equipment according to claim 6, it is characterized in that, described experiment power supply degree of stability control circuit is connected with described standard current transformer and standard potential transformer respectively, and it comprises: voltage, electric current, phase detecting circuit and power supply regulator circuit.
CNA2008100877821A 2008-03-26 2008-03-26 Method and apparatus for checking global error of high voltage energy metering installation CN101251585A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101907696A (en) * 2010-06-08 2010-12-08 华立仪表集团股份有限公司 Electric energy meter production detecting system and method
CN102053203A (en) * 2010-11-04 2011-05-11 武汉国测恒通智能仪器有限公司 Detection method and device for high-voltage power quality
CN102338865A (en) * 2011-06-17 2012-02-01 杭州炬华科技股份有限公司 Method for quickly calibrating error of three-phase intelligent electric energy meter
CN102901945A (en) * 2012-09-27 2013-01-30 陕西富集电力科技股份有限公司 Integrated error checking system of electric energy meter
CN101865988B (en) * 2009-04-15 2013-03-27 武汉国测恒通智能仪器有限公司 Test power supply for error check of high-voltage electric energy metering device and implementation method thereof
CN101865986B (en) * 2009-04-15 2013-08-14 武汉国测恒通智能仪器有限公司 System and method for checking error of high-voltage electric energy measurement device
CN104502882A (en) * 2014-12-08 2015-04-08 国网四川省电力公司电力科学研究院 Standard device for tracing 10kV-35kV high voltage electric energy value
CN105203980A (en) * 2015-09-14 2015-12-30 广西电网有限责任公司电力科学研究院 Electric energy quality self-inspection system and self-inspection method thereof
CN105738850A (en) * 2014-12-10 2016-07-06 云南电网公司电力科学研究院 High-voltage voltage and current signal generation control device

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101865986B (en) * 2009-04-15 2013-08-14 武汉国测恒通智能仪器有限公司 System and method for checking error of high-voltage electric energy measurement device
CN101865988B (en) * 2009-04-15 2013-03-27 武汉国测恒通智能仪器有限公司 Test power supply for error check of high-voltage electric energy metering device and implementation method thereof
CN101907696B (en) * 2010-06-08 2013-03-20 华立仪表集团股份有限公司 Electric energy meter production detecting system and method
CN101907696A (en) * 2010-06-08 2010-12-08 华立仪表集团股份有限公司 Electric energy meter production detecting system and method
CN102053203A (en) * 2010-11-04 2011-05-11 武汉国测恒通智能仪器有限公司 Detection method and device for high-voltage power quality
CN102338865A (en) * 2011-06-17 2012-02-01 杭州炬华科技股份有限公司 Method for quickly calibrating error of three-phase intelligent electric energy meter
CN102338865B (en) * 2011-06-17 2013-11-06 杭州炬华科技股份有限公司 Method for quickly calibrating error of three-phase intelligent electric energy meter
CN102901945A (en) * 2012-09-27 2013-01-30 陕西富集电力科技股份有限公司 Integrated error checking system of electric energy meter
CN104502882A (en) * 2014-12-08 2015-04-08 国网四川省电力公司电力科学研究院 Standard device for tracing 10kV-35kV high voltage electric energy value
CN105738850A (en) * 2014-12-10 2016-07-06 云南电网公司电力科学研究院 High-voltage voltage and current signal generation control device
CN105203980A (en) * 2015-09-14 2015-12-30 广西电网有限责任公司电力科学研究院 Electric energy quality self-inspection system and self-inspection method thereof
CN105203980B (en) * 2015-09-14 2018-08-24 广西电网有限责任公司电力科学研究院 A kind of power quality self-checking system and its self checking method

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