CN1945350B - Detecting method and device for electric energy metering secondary coop composition error - Google Patents
Detecting method and device for electric energy metering secondary coop composition error Download PDFInfo
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Abstract
The invention is about a synthesized error detecting method of secondary circuit electricity power measurement and its equipment. The method is: the power meter tests the power information, meanwhile, the power metering equipment placed in the power meter measures the electric energy information and the voltage information of PT start point of a secondary circuit at the same time, and sends the voltage information to the metering equipment through its annex via wire or wireless transmission / reception method in real-time. The measured energy difference between the two measurement devices is the synthesis error of the secondary circuit, which provides another kind of test method for measuring electric energy.
Description
A technical field
The invention discloses a method and a device for detecting comprehensive errors of an electric energy metering secondary circuit, belongs to the technical field of electric energy metering tests, and particularly relates to a method for accurately detecting the comprehensive errors of the electric energy metering secondary circuit on line in real time and a detection device 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 necessary tool for metering electric energy, and is an effective means for trade settlement of electricity supply and electricity utilization by both the electricity supply and the electricity utilization. The accuracy of the electric energy metering device is directly related to the economic benefits of both the power supply and the power utilization. Therefore, the state regulations on electric energy metering require that the error of the electric energy metering device be regularly checked on site.
The electric energy metering device is generally composed of a voltage transformer (PT), a Current Transformer (CT) and an electric energy meter. Therefore, the error of the electric energy metering device is composed of PT error, CT error, error caused by PT secondary voltage drop, and error of the electric energy meter. The PT error and the CT error are called as the error of a primary loop of the electric energy metering, and the error caused by the PT secondary voltage drop and the error of the electric energy meter are called as the error of a secondary loop of the electric energy metering. Because PT and CT are generally composed of materials with high temperature and time stability, such as iron cores and coils, the errors of PT and CT are generally fixed and do not need to be measured frequently. And the error caused by the secondary voltage drop of the PT and the error of the electric energy meter are changed greatly, so that they need to be measured frequently.
Hitherto, the method for measuring the comprehensive error of the electric energy metering secondary loop is to measure the error of the electric energy meter and the PT secondary voltage drop by using an electric energy meter on-site calibration instrument and a PT secondary voltage drop tester respectively, then calculate the measurement error caused by the PT secondary voltage drop by a calculation formula according to the measurement value of the PT secondary voltage drop, and finally add the error of the electric energy meter and the error caused by the calculated PT secondary voltage drop to obtain the comprehensive error of the electric energy metering secondary loop. Since the calculation formula of the error caused by the PT secondary voltage drop contains a parameter called an average power factor, which represents an average value over a period of time (several months) and is not easy to estimate its accurate value, the current method does not obtain a comprehensive error of a real electric energy metering secondary circuit at a certain time, but an estimated value. Therefore, it is urgent and hoped to research a detection method capable of measuring the comprehensive error of the secondary circuit of the electric energy metering in real time on line. The method successfully researched provides a brand-new electric energy metering secondary circuit comprehensive error detection method, and the brand-new electric energy metering secondary circuit comprehensive error detection method has two key points: 1. two detection, namely detecting electric energy data at a PT part and a user electric energy meter part respectively; 2. the electric energy metering information of two places in the same time period is collected to an electric energy metering instrument of any place or two places in a wired transmission or wireless transmission/receiving mode, and the difference of the two electric energies is metered, namely the comprehensive error of the secondary loop electric energy metering. From the above 2 points, the method can derive at least two detection methods, and the two detection methods and the derived detection devices have somewhat different mechanisms and structures. One of which is metered at PT; metering at a user electric energy meter; there is a third type of co-metering at two locations (this cumbersome approach works in theory, but is not generally used); for one, we have applied for chinese patents: an electric energy metering secondary circuit comprehensive error testing method and a testing device thereof (application number: 200610048108.3, application date: 2006.8.4.), an electric energy metering secondary circuit comprehensive error testing device (application number: 200620127248.5, application date: 2006.8.4.) and a patent is reapplied according to the method II. The two methods can complete the online real-time measurement of the comprehensive error of the secondary circuit of the electric energy metering which cannot be completed in the past, are simple and easy to implement, and can accurately measure the comprehensive error of the secondary circuit of the electric energy metering. The detection device is developed and designed successfully according to the method II, and the novel electric energy metering detection device can directly and accurately measure the comprehensive error of the electric energy metering secondary circuit on line in real time, can provide accurate data of power supply and power utilization, can better protect the economic benefits of both the power supply and the power utilization, and also makes a contribution to the scientific and technological progress of the electric power industry.
Third, the invention
The invention aims to: the method can conveniently and accurately measure the comprehensive error of the secondary circuit of the electric energy metering, thereby providing a brand new accurate means for detecting the electric energy metering and a convenient and quick detection device for both a power supply party and a power utilization party.
The technical scheme of the invention comprises two parts, namely a method for detecting the comprehensive error of the secondary circuit of the electric energy metering, and a device for detecting the comprehensive error of the secondary circuit of the electric energy metering.
As described in the "background of the invention", the secondary loop integration error with respect to electrical energy metering typically includes two parts: one is the error caused by the pressure drop of the secondary loop; the second is the error caused by the metering of the electric energy meter. The technical scheme of the method for detecting the comprehensive error of the secondary circuit of the electric energy metering is as follows: the method for detecting the comprehensive error of the electric energy metering secondary circuit is a detection method for accurately detecting the comprehensive error of the electric energy metering secondary circuit on line in real time, and is technically characterized in that: the method for detecting the comprehensive error of the electric energy metering secondary circuit comprises the following steps: the electric energy meter measures or detects the electric energy information of the user electric energy meter, the electric energy meter arranged at the user electric energy meter simultaneously measures or detects the current information of the electric energy meter in the same time period and the voltage information of the PT starting end part of the secondary circuit to be detected in the same time period, the electric energy meter collects the voltage measuring information of the PT starting end part of the secondary circuit to be sampled or detected in the same time period to the electric energy meter in a wired transmission or wireless sending/receiving mode in real time without error or negligible error through a detection accessory of the electric energy meter, and the difference between the two instruments, namely the user electric energy meter and the electric energy meter arranged at the user electric energy meter measures the electric energy, namely the comprehensive error of the electric energy metering of the secondary circuit. The electric energy metering instrument is a known public electric energy metering instrument, can be used when the precision is required to be higher, and has high metering accuracy. The PT starting position is the position where the voltage transformer PT is arranged. The same time period is the time period for simultaneously measuring the electric energy (current and voltage values) at the end part of the PT starting position of the secondary loop and the root part of the measuring position of the user electric energy meter. The detection accessory comprises: at least one mechanism for transmitting the detected voltage metering information by wire transmission or/and wireless transmission. The method for collecting the voltage metering information of two metering or detecting places in the same time period to the electric energy metering instrument at the electric energy meter of the user brings the advantages that: the method can be implemented simply and conveniently by using an electric energy metering instrument as a main part and detection accessories thereof and matching with electric energy meters of various users to detect the comprehensive errors of the electric energy metering secondary circuits of a plurality of users.
According to the method for detecting the comprehensive error of the electric energy metering secondary circuit, the technical characteristics are as follows: the method for collecting the voltage metering information of the end part of the PT starting position of the secondary circuit sampled or detected in the same time period to the electric energy metering instrument in real time without error or with negligible error in a wired transmission or wireless transmission/receiving mode comprises the following steps: a. the method for collecting the sampled or detected voltage metering information to the electric energy metering instrument in a real-time, error-free or error-negligible manner in a wired transmission mode comprises the following steps: the detection accessory and the cable thereof of the electric energy metering instrument are required to have a fixed known detection error value and deduct the fixed known detection error value, and the fixed known detection error value is required to be fixed or the error is negligibly small in the measurement. The method for collecting the sampled or detected voltage metering information to the electric energy metering instrument in a wired transmission or wireless transmission/reception mode in real time without errors or with negligible errors comprises the following steps: the voltage metering information sampled or detected by the detection accessory of the electric energy metering instrument is digitalized and then gathered on the electric energy metering instrument in a wired transmission or wireless transmission/receiving method without error or with negligible error, and the digitalized transmission or transmission is beneficial.
According to the method for detecting the comprehensive error of the electric energy metering secondary circuit, the technical characteristics are as follows: the method for measuring or detecting the electric energy information of the user electric energy meter by the user electric energy meter and simultaneously measuring or detecting the current information of the same time period at the electric energy meter and the voltage information of the same time period at the end part of the PT starting position of the secondary circuit to be measured by the electric energy measuring instrument arranged at the user electric energy meter comprises the following steps: sampling and metering or detecting the electric energy characterized by the pulse number or digital quantity of the electric energy in the same time period of two tested places, wherein the electric energy characterized by the pulse number is sampled (or read) by one rotation of a rotating disk of the electric energy meter or directly sends out one electric energy pulse by the sampling electric energy meter. The electric energy characterized by the digital quantity, such as a digital electric energy meter, can directly read or input the digital quantity of the electric energy meter. They are sampled to represent the measured electrical energy. The electric energy of the electric energy meter is measured by combining the voltage value of the end part of the PT starting position of the secondary circuit to be measured and the current value of the user electric energy meter. The method for sampling, metering or detecting the voltage value and the current value in the same time period at two places to be detected comprises the following steps: the sampling is carried out by directly connecting with a three-phase secondary cable of voltage and current.
According to the method for detecting the comprehensive error of the electric energy metering secondary circuit, the technical characteristics are as follows: the electric energy metering instrument selection scheme used in the electric energy metering secondary circuit comprehensive error detection method is as follows: the device for detecting the comprehensive error of the electric energy metering secondary circuit is designed and manufactured by adopting the method for detecting the comprehensive error of the electric energy metering secondary circuit, the main body part of the device is provided with mechanisms and structures for electric energy metering or detection, and the mechanisms and structures for electric energy metering or detection can be solved and designed by using the existing known and public technical contents, for example, an electric energy metering device field detector with the patent number of ZL200420016518.6 is a preferred reference sample list of the device for detecting the comprehensive error of the electric energy metering secondary circuit, and the like, but not necessarily multiple mechanisms are required. The method is characterized in that: the device is provided with at least one or more than one (such as two or three, etc.) detection accessories capable of detecting voltage metering information in real time without error or with negligible error, wherein the detection accessories are detection terminals or/and extension sets: a. the device is provided with at least one detection end for detecting voltage metering information and a cable thereof; b. the device is provided with at least one mechanism for wire transmission or/and wireless transmission of detected voltage metering information, wherein the mechanism is composed of electronic mechanisms, the mechanism is connected with the main body part of the device through a transmission wire cable or is in wireless transmission/reception communication, the mechanisms are split parts arranged outside the main body part of the device to form a sub-set of the device, and the sub-set is composed of a shell and the 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.
According to the method for detecting the comprehensive error of the electric energy metering secondary circuit, the detailed technical characteristics are as follows: a. the structure of at least one detection end for detecting voltage metering information of the device belt is as follows: the cable connected with the detection input end of the device and the sampling detection end of the end part of the device are connected with the direct voltage three-phase secondary cable. b. The device is provided with at least one split or extension mechanism for the voltage metering information of wired transmission detection, and the detailed structure of the mechanism for the voltage metering information of wired transmission detection between the extension mechanism and the device is as follows: the sampling part of the sampling circuit can be set at the beginning end of the secondary circuit to be tested, i.e. the voltage metering information sampling position of PT position, and its sampling part is the connecting end of direct and voltage three-phase secondary cable, and is connected with the movable connector of the interface circuit to form the wired transmission extension of said equipment, and its movable connector is the output and input mechanism connecting end of said wired transmission extension, and its fixed connector is formed into the input circuit of said equipment voltage metering information. c. The said device belt at least one split or extension mechanism for wireless transmission of detected voltage metering information, the detailed structure of the wireless transmission detection voltage metering information mechanism between the extension and the device is: the sampling circuit of the voltage metering information, the analog/digital conversion circuit controlled by the controller, the sending circuit and the sending antenna thereof are functionally connected to form an extension set for wirelessly sending the detected voltage metering information, the sampling part of the sampling circuit can be arranged at the end part of the initial part of the tested secondary loop, namely the voltage metering information sampling part at the PT part, and the sampling part is the connecting end of a direct voltage three-phase secondary cable; the device is also provided with a mechanism for wirelessly receiving the detected voltage metering information, wherein the mechanism for wirelessly receiving the detected voltage metering information is arranged on the main body part of the device and is formed by functionally connecting a receiving circuit of the voltage metering information, a receiving antenna of the receiving circuit, an amplifying circuit and an input circuit, and the input circuit is the input circuit of the voltage metering information of the device. The device is not excluded to have a plurality of (such as one of three) detecting terminals for detecting the voltage metering information, a plurality of slave units for transmitting the detected voltage metering information by wire, and a plurality of slave units for transmitting the detected voltage metering information by wireless.
According to the method for detecting the comprehensive error of the electric energy metering secondary circuit, the detailed technical characteristics are as follows: 1) the detailed structure of the at least one detection end for detecting the voltage metering information of the device belt is as follows: 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 the detection error caused by the detection end when detecting the voltage metering information is fixed and known, can be deducted in the detection, and becomes error-free or error-negligibly small in the metering. 2) The detailed structure of the wired transmission detection voltage metering information mechanism between the extension and the device is as follows: a. the structure of the wired transmission voltage measurement information detection mechanism 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 wired transmission detection voltage metering information mechanism 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, a photoelectric conversion interface circuit, an amplifying circuit and an input circuit one by one. The configurations described in both points a and b above have a digitizing mechanism and then the detected voltage measurement information is collected onto the device by wired transmission with no or negligible error. Or, the structure of the wired transmission detection voltage metering information mechanism is formed by connecting a digital sampling circuit, a digital amplifying circuit, a transmission circuit, an interface circuit and a digital input circuit one by one; or d, the structure of the wired transmission detection voltage metering information mechanism is composed of a digital output end, a wired transmission cable and a digital input end. The digital transmission structure described in the above two points c and d can directly gather the detected voltage metering information to the device by wire transmission without error or with error as small as negligibly small. 3) The sub-unit of the at least one wireless transmission detection voltage measurement information of the device belt, the sub-unit and the device wireless transmission/reception detection voltage measurement information mechanism have the following detailed structure: a. the structure of the wireless transmission detection voltage metering information mechanism 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 mechanism and the structure for wirelessly receiving and detecting the voltage metering information are formed by functionally connecting a wireless data transmission communication module, a receiving antenna thereof, a digital processing module and an input circuit. Or b, the structure of the wireless transmission detection voltage measurement information mechanism is formed by connecting a sampling circuit, an analog/digital conversion circuit controlled by a controller, a digital modulation circuit, a frequency conversion transmission circuit and a transmission antenna function thereof; the mechanism and the structure for wirelessly receiving and detecting the voltage metering information are formed by functionally connecting a receiving and frequency conversion circuit, a receiving antenna thereof, a digital demodulation circuit and an input circuit. The structures described in the above two points a and b have a digitizing processing mechanism, and then the detected voltage measurement information is collected to the device by wireless transmission without error or with error as small as negligible. Or, the structure of the wireless voltage measurement information sending and detecting mechanism is formed by connecting a digital sampling circuit, a digital amplifying circuit and a sending antenna function thereof; the mechanism and the structure for wirelessly receiving and detecting the voltage metering information 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 measurement information to the device in a wireless transmission/reception mode directly without error or with error as small as negligibly.
The technical scheme of the device for detecting the comprehensive error of the secondary circuit of the electric energy metering is as follows: according to the comprehensive error detection method of the electric energy metering secondary circuit, the comprehensive error detection device of the electric energy metering secondary circuit is designed and manufactured. The main body of the device is provided with mechanisms and structures for measuring or detecting the electric energy, and the mechanisms and structures of the devices for measuring or detecting the electric energy can be solved and designed by the existing known and common technical contents, for example, a field detector of the device for measuring the electric energy with the patent number ZL200420016518.6 is a preferred reference sample list of the device for detecting the comprehensive error of the secondary circuit for measuring the electric energy, and the like, and the number of the devices is not necessarily multiple. The technical characteristics are that: a. the device is provided with at least one or more than one (such as two or three, etc.) detection terminals and cables thereof for detecting voltage metering information in real time without errors or with negligible errors, which requires that the detection terminals and the cables thereof have fixed structures and fixed known detection error values and subtract the detection error values, so that the detection terminals and the cables thereof become error-free or error-negligible in metering. b. The device is provided with at least one or more than one (such as two or three, etc.) mechanism for wire transmission or/and wireless transmission of detected voltage metering information in real time without error or with negligible error, wherein the mechanism is composed of electronic mechanisms, the mechanism is connected with the main body part of the device through a transmission wire cable or wirelessly transmits/receives, the mechanisms are split parts arranged outside the main body part of the device to form an extension of the device, and the extension is composed of a shell and the electronic mechanisms therein. The electronic mechanism is composed of various electronic components, devices, modules, parts, integrated circuit blocks, electronic circuits, software programs, and the like. The real-time wired transmission or wireless transmission without errors or with negligible errors refers to: the wire transmission or wireless transmission extension of the device collects the sampled or detected voltage metering information into the device without error or with error negligibly small after being processed digitally.
According to above electric energy measurement secondary circuit comprehensive error detection device, technical characteristics have: a. the structure of at least one detection end for detecting voltage metering information of the device belt is as follows: the cable connected with the detection input end of the device and the sampling detection end at the end part of the cable are directly connected with a voltage three-phase secondary cable, so that the sampling precision is higher. b. The device is provided with at least one split or extension mechanism for the voltage metering information of wired transmission detection, and the detailed structure of the mechanism for the voltage metering information of wired transmission detection between the extension mechanism and the device is as follows: the sampling part of the sampling circuit can be set at the beginning end of the secondary circuit to be tested, i.e. the voltage metering information sampling position of PT position, and its sampling part is the connecting end of direct and voltage three-phase secondary cable, and is connected with the movable connector of the interface circuit to form the wired transmission extension of said equipment, and its movable connector is the output and input mechanism connecting end of said wired transmission extension, and its fixed connector is formed into the input circuit of electric energy metering information of said equipment. c. The said device belt at least one split or extension mechanism for wireless transmission of detected voltage metering information, the detailed structure of the wireless transmission detection voltage metering information mechanism between the extension and the device is: the sampling circuit of the voltage metering information, the analog/digital conversion circuit controlled by the controller, the sending circuit and the sending antenna thereof are functionally connected to form an extension set for wirelessly sending the detected voltage metering information, the sampling part of the sampling circuit can be arranged at the end part of the initial part of the tested secondary loop, namely the voltage metering information sampling part at the PT part, and the sampling part is the connecting end of a direct voltage three-phase secondary cable; the device is also provided with a mechanism for wirelessly receiving the detected voltage metering information, wherein the mechanism for wirelessly receiving the detected voltage metering information is arranged on the main body part of the device and is formed by functionally connecting a receiving circuit of the voltage metering information, a receiving antenna of the receiving circuit, an amplifying circuit and an input circuit, and the input circuit is the input circuit of the voltage metering information of the device. The device is not excluded to have a plurality of (such as one of three) detecting terminals for detecting the voltage metering information, a plurality of slave units for transmitting the detected voltage metering information by wire, and a plurality of slave units for transmitting the detected voltage metering information by wireless.
According to above electric energy measurement secondary circuit comprehensive error detection device, technical characteristics still have: 1) the detailed structure of the at least one detection end for detecting the voltage metering information of the device belt is as follows: 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 the detection error caused by the detection end when detecting the voltage metering information is fixed and known, can be deducted in the detection, and becomes error-free or error-negligibly small in the metering. 2) The detailed structure of the wired transmission detection voltage metering information mechanism between the extension and the device is as follows: a. the structure of the wired transmission voltage measurement information detection mechanism 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 wired transmission detection voltage metering information mechanism 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, a photoelectric conversion interface circuit, an amplifying circuit and an input circuit one by one. The configurations described in both points a and b above have a digitizing mechanism and then the detected voltage measurement information is collected onto the device by wired transmission with no or negligible error. Or, the structure of the wired transmission detection voltage metering information mechanism is formed by connecting a digital sampling circuit, a digital amplifying circuit, a transmission circuit, an interface circuit and a digital input circuit one by one; or d, the structure of the wired transmission detection voltage metering information mechanism is composed of a digital output end, a wired transmission cable and a digital input end. The digital transmission structure described in the above two points c and d can directly gather the detected voltage metering information to the device by wire transmission without error or with error as small as negligibly small. 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.
According to the electric energy measurement secondary circuit comprehensive error detection device, detailed technical characteristics are as follows: the sub-unit of the voltage measuring information wirelessly transmitted and detected by at least one of the devices, the sub-unit and the device wirelessly transmit/receive the detected voltage measuring information mechanism, the detailed structure of which is as follows: a. the structure of the wireless transmission detection voltage metering information mechanism 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 mechanism and the structure for wirelessly receiving and detecting the voltage metering information are formed by functionally connecting a wireless data transmission communication module, a receiving antenna thereof, a digital processing module and an input circuit. Or b, the structure of the wireless transmission detection voltage measurement information mechanism is formed by connecting a sampling circuit, an analog/digital conversion circuit controlled by a controller, a digital modulation circuit, a frequency conversion transmission circuit and a transmission antenna function thereof; the mechanism and the structure for wirelessly receiving and detecting the voltage metering information are formed by functionally connecting a receiving and frequency conversion circuit, a receiving antenna thereof, a digital demodulation circuit and an input circuit. The structures described in the above two points a and b have a digitizing processing mechanism, and then the detected voltage measurement information is collected to the device by wireless transmission without error or with error as small as negligible. Or, the structure of the wireless voltage measurement information sending and detecting mechanism is formed by connecting a digital sampling circuit, a digital amplifying circuit and a sending antenna function thereof; the mechanism and the structure for wirelessly receiving and detecting the voltage metering information 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 measurement information to the device in a wireless transmission/reception mode directly without error or with error as small as negligibly. 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 electric energy metering secondary circuit comprehensive error detection method has the advantages that: firstly, the method provides another brand-new electric energy metering secondary circuit comprehensive error detection method; secondly, the method can directly and accurately measure the comprehensive error of the electric energy metering secondary circuit in real time on line; thirdly, compared with the previously applied method for testing the comprehensive error of the secondary loop of the electric energy metering and the method of the testing device (application number: 200610048108.3, application date: 2006.8.4.), the method is simple, convenient and practical in detection, and is worth popularizing and using in the fields of electric power systems and electric industry detection.
The electric energy metering secondary circuit comprehensive error detection device has the advantages that: 1. the device for detecting the comprehensive error of the electric energy metering secondary circuit can complete the online real-time measurement of the comprehensive error of the electric energy metering secondary circuit which cannot be completed in the past; 2. the comprehensive error of the electric energy metering secondary circuit can be simply, conveniently, directly and accurately measured; 3. the device provides a practical device for measuring the comprehensive error of the secondary loop of the electric energy metering for both the power supply and the power utilization, and has very obvious practical significance; 4. compared with the prior electric energy metering secondary loop comprehensive error testing method and device (application number: 200610048108.3, application date: 2006.8.4.), the device has simpler, more reasonable and more practical structure and is easier and more convenient to detect. 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 7 in total:
FIG. 1 is a schematic diagram of a method for detecting comprehensive errors of a secondary circuit of electric energy metering;
FIG. 2 is a schematic diagram of a detection device for comprehensive errors of an electric energy metering secondary circuit by adopting a wired transmission mechanism with an error-free detection end and a structure;
FIG. 3 is a schematic diagram of a device for detecting the comprehensive error of an electric energy metering secondary circuit by adopting an error-free wired transmission mechanism and a structure;
FIG. 4 is a schematic diagram of an error-free wired transmission voltage measurement information mechanism and structure of the electric energy measurement secondary circuit comprehensive error detection device shown in FIG. 3;
FIG. 5 is a schematic diagram of a device for detecting the comprehensive error of an electric energy metering secondary circuit by adopting an error-free wireless transmitting/receiving mechanism and a structure;
FIG. 6 is a schematic diagram of an error-free wireless voltage measurement information transmitting/receiving mechanism and structure of the device for detecting the comprehensive error of the secondary circuit of the electric energy measurement in FIG. 5;
FIG. 7 is a schematic diagram of another error-free wireless voltage measurement information transmitting/receiving mechanism and structure of the device for detecting the comprehensive error of the secondary circuit of the electric energy measurement in FIG. 5;
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 voltage transformer (PT); 2. a Current Transformer (CT); 3. a voltage three-phase secondary line input end; 4. a current three-phase secondary line input end; 5. a current three-phase secondary cable; 6. a voltage three-phase secondary cable; 7. a sampling end at the initial part (end part) of the voltage three-phase secondary line; 8. a sampling end at the position (end part) of a voltage three-phase secondary line user electric energy meter; 9. a sampling end at the position (end part) of the current three-phase secondary line user electric energy meter; 10. a user electric energy meter; 11. an electric energy metering instrument (or a detection device for comprehensive errors of an electric energy metering secondary circuit); 12. a detection accessory (a detection end or/and an extension set) for sampling and wired transmission or wireless transmission of voltage information; 13. the sampling electric energy pulse input is indicated; 14. indicating the voltage metering information of wired transmission; 15. indicating wireless transmission voltage metering information; 16. indicating the boundary of an outdoor site and a user control room; 17. indicating sampling voltage information; 18. a controller, such as a microprocessor or a single chip microcomputer; 19. an analog/digital conversion circuit; 20. a photoelectric isolation circuit (out); 21. a differential amplification output circuit; 22. a differential amplification input circuit; 23. a photoelectric isolation circuit (in); 24. a digital processing module (a); 25. an interface circuit (a); 26. a wireless data transmission communication module (a); 27. a wireless data transmission communication module (b); 28. an interface circuit (b); 29. a digital processing module (b); 30. a digital modulation circuit; 31. a frequency conversion circuit; 32. an amplifying transmission circuit; 33. a receiving and frequency conversion circuit; 34. a digital demodulation circuit.
Detailed description of the preferred embodiments
Non-limiting examples of the invention are as follows:
embodiment I, comprehensive error detection method and device for secondary circuit of electric energy metering
The content of the embodiment comprises two parts, wherein one part relates to a comprehensive error detection method of the electric energy metering secondary circuit, and the other part relates to a comprehensive error detection device of the electric energy metering secondary circuit.
Method for detecting comprehensive error of secondary circuit of electric energy metering
The secondary loop integration error with respect to electrical energy metering typically includes two parts: one is the error caused by the pressure drop of the secondary loop; the second is the error caused by the metering of the electric energy meter. The method for detecting the comprehensive error of the electric energy metering secondary circuit is a method for accurately detecting the comprehensive error of the electric energy metering secondary circuit on line in real time, and the specific situation is shown in the attached figure 1 of the specification. The method for detecting the comprehensive error of the electric energy metering secondary circuit shown in the figure 1 comprises the following steps: the user electric energy meter 10 measures or detects the electric energy information (8, 9 sampling ends) at the position, the electric energy metering instrument 11 arranged at the position of the user electric energy meter simultaneously measures or detects the current information (9 sampling end) at the position of the electric energy meter in the same time period and the voltage information at the end part (7 sampling end) at the PT starting position of the secondary circuit to be measured in the same time period, the electric energy metering instrument 11 of the example collects the sampled or detected voltage metering information to the electric energy metering instrument 11 in a wired transmission mode or/and a wireless sending/receiving mode in real time, without error or with error as small as negligibly, and the difference between the two instruments 10 and 11 for metering the electric energy is the comprehensive error of the electric energy metering of the secondary circuit. The electric energy metering instrument 11 is a public known electric energy metering instrument or the electric energy metering secondary circuit comprehensive error detection device of the invention, can be used when the precision is required to be higher, and has high metering accuracy. The PT starting position is the position where the voltage transformer PT is arranged. The same time period is the time period for simultaneously measuring the electric energy (the voltage and the current values of the sampling ends 8 and 9) at the end part (the sampling end 7) at the PT starting position and the root part at the measuring position of the user electric energy meter of the secondary circuit. The detection accessory 12 comprises: at least one mechanism for transmitting the detected voltage metering information in a wired transmission mode or/and a wireless mode can be the electric energy metering instrument 11, or/and a wired detection end 12, or/and a split extension 12 in a wired transmission mode or/and a wireless transmission mode. The method for integrating the voltage metering information of two metering or detecting places in the same time period to the electric energy metering instrument 11 at the electric energy meter 10 of the user has the advantages that: the electric energy metering device 11 and the detection accessory 12 thereof can be used as the main part and are matched with the electric energy meters 10 of all users, the comprehensive errors of the electric energy metering secondary circuits of many users can be detected, and the detection method is simple and convenient to implement. The method for collecting the sampled or detected voltage metering information to the electric energy metering instrument 11 in real time without error or with negligible error in a wired transmission or/and wireless transmission/reception mode comprises the following steps: a. the use of the test accessory 12 and its cable of the electrical energy meter 11, which has a fixed known test error value and deducts it, is error-free or error-negligible in the measurement, which requires that its test accessory 12 has a fixed electrical structure and a fixed known test error value. Or b, after the voltage metering information sampled or detected by the detection accessory 12 of the electric energy metering device 11 is digitized, the voltage metering information is gathered on the electric energy metering device 11 in a wired transmission or wireless transmission/reception method without error or with negligible error, and the digitized transmission or transmission is beneficial. The method for simultaneously measuring or detecting the electric energy of the end part (7 sampling end) of the PT starting position of the tested secondary circuit and the electric energy of the user electric energy meter 10 (8 sampling end and 9 sampling end) in the same time period in real time on line comprises the following steps: sampling and metering or detecting the electric energy represented by the number of pulses or digital quantity of the electric energy in two same time periods to be measured, wherein the electric energy represented by the number of pulses is sampled (or read) by one rotation of a rotating disk of the electric energy meter or is directly sent out by the sampling electric energy meter. The electric energy represented by digital quantity, such as digital electric energy meter, can be directly read or input into the digital quantity of the electric energy meter. They are sampled to represent the measured electrical energy. The electric energy of the electric energy meter 11 is measured by combining the voltage value of the PT starting end (7 sampling end) of the secondary circuit to be measured and the current value of the user electric energy meter (9 sampling end). The method for sampling, metering or detecting the voltage value and the current value in the same time period at two places to be detected comprises the following steps: the sampling device is directly connected with a three-phase secondary cable of voltage and current for sampling, the sampling precision is higher, or the current sampling can be carried out by adopting a pincer-shaped current transformer. In FIG. 1 is illustrated: 13 schematic sampled power pulse input; 14 illustrates wired transmission voltage metering information; 15, wirelessly transmitting voltage metering information; 16 illustrates the outdoor site demarcated from the user control room.
Electric energy metering secondary loop comprehensive error detection device
The comprehensive error detection device for the electric energy metering secondary circuit is designed and manufactured according to an electric energy metering secondary circuit comprehensive error detection method. The specific structure of the device of this example is shown by fig. 2, 3 and 4, and 5 and 6 in combination. The main body part (11 in each figure) of the device of the example has a mechanism and a structure for measuring or detecting the electric energy, and comprises: the detailed mechanisms and structures of the electric energy metering or detecting device can be solved and designed by the existing well-known and public technical contents, for example, the field detector of the electric energy metering device with the patent number ZL200420016518.6 is the preferred reference sample board of the electric energy metering secondary circuit comprehensive error detecting device 11, and the like, but not necessarily multiple parts. The technical characteristics are that: a. the device 11 of this example and/or the test terminal 12 and its cable with at least one real-time, error-free or error-negligible test voltage measurement information requires that the test terminal and its cable have a fixed structure and a fixed known test error value and deduct it to be error-free or error-negligibly small in the measurement. b. The device 11 of this example and/or the means 12 for wired transmission of the detected voltage metering information in real time, without or with negligible error. c. The device 11 of this example and/or the means 12 for wireless transmission of the detected voltage measurement information in real time, without or with negligible error. The mechanisms in b and c above are each composed of an electronic mechanism, the mechanism 12 is connected to the main body portion of the device 11 of this example by a wired cable for transmission or is in wireless transmission/reception communication, these mechanisms are separate portions provided outside the main body portion of the device 11 of this example, and constitute the slave unit 12 of this example, and the slave unit 12 is composed of a housing and an electronic mechanism therein. The electronic mechanism is composed of various electronic components, devices, modules, parts, integrated circuit blocks, electronic circuits, software programs, and the like. The real-time wired transmission or wireless transmission without errors or with negligible errors refers to: the wired transmission or wireless transmission extension 12 of the device 11 of this example collects the sampled or detected voltage measurement information into the device 11 of this example without error or with error negligibly small. It is also noted that: the device 11 of this example has a configuration in which a detection terminal 12 for detecting voltage measurement information, a slave unit 12 for transmitting the detected voltage measurement information by wire, and a slave unit 12 for transmitting the detected voltage measurement information by wireless are provided at the same time. As shown in fig. 2: the structure of the device 11 and/or the detection terminal 12 for detecting voltage measurement information of at least one belt of this example is: the cable connected with the detection input end of the device 11 of the embodiment and the sampling detection end of the end part of the cable are directly connected with a voltage three-phase secondary cable, so that the sampling precision is high. The detailed structure of the device 11 and/or the detection terminal 12 for detecting the voltage measurement information of at least one belt in this example is: the detection cable and the sampling detection end of the detection end 12 have fixed structures, such as fixed cable length, fixed detection end head and electrical parameter structure, so that the detection error caused by the detection end 12 when detecting the voltage measurement information is fixed and known, and can be deducted during detection, and becomes error-free or error-negligibly small during measurement. As shown in fig. 3 and 4: the device 11 and/or the separate or slave unit mechanism 12 with at least one wired transmission detection voltage measurement information, the wired transmission detection voltage measurement information mechanism between the slave unit 12 and the device 11 of the embodiment is structured as follows: the sampling circuit of the voltage metering information-analog/digital conversion circuit 19 controlled by the controller 18-transmission circuit and transmission cable-interface circuit and connector-input circuit function connection component, its sampling component can be placed in the beginning end portion (7 sampling end) of tested secondary circuit, i.e. secondary voltage metering information sampling position of PT position, its sampling component is the connecting end of direct and voltage three-phase secondary cable, in the figure 17 it shows sampling voltage information, before the movable connector of the interface circuit, it forms the wired transmission extension 12 of said example device 11, its movable connector is the connecting end of input and output mechanism of said wired transmission extension 12, and its fixed connector forms the voltage metering information input circuit of said example device 11. The detailed structure of the device 11 and/or at least one wired transmission detection voltage metering information extension 12 of the belt of the embodiment is as follows: the structure of the wired transmission voltage measurement information detection mechanism in the embodiment is formed by connecting a sampling circuit, an analog/digital conversion circuit 19 controlled by a controller 18, a photoelectric isolation circuit (output) 20, a differential output circuit 21, a transmission circuit, a differential input circuit 22, a photoelectric isolation circuit (input) 23 and an input circuit one by one. The wired transmission detection voltage metering information mechanism of this example has an analog/digital conversion circuit 19 controlled by a digital processing mechanism controller 18, and then collects the detected voltage metering information onto the device 11 of this example by wired transmission with no or negligible error. The circuits of the wired transmission detection voltage metering information mechanism can be designed and manufactured by using the existing known and public technology and the known and public commercial electronic circuit parts, so long as the circuits can complete or realize the functions of the circuits. As shown in fig. 5 and 6: the device 11 and/or the separate or slave unit means 12 with at least one wireless transmission/reception means for wirelessly transmitting the detected voltage measurement information, the slave unit 12 and the device 11 of this example are configured to wirelessly transmit/receive the detected voltage measurement information: the sampling circuit of the voltage metering information, the analog/digital conversion circuit 19 controlled by the controller 18, the sending circuit and the sending antenna thereof are functionally connected to form an extension set for wirelessly sending the detected voltage metering information, the sampling part of the sampling circuit can be arranged at the initial end part of a secondary circuit to be detected, namely the voltage metering information sampling part at the PT part, for example, the sampling part is the connecting end directly connected with a voltage three-phase secondary cable, and the sampling part 17 in the figure shows the sampling voltage information; the device 11 of this example is also required to be correspondingly provided with a mechanism for wirelessly receiving the detected voltage measurement information, the mechanism for wirelessly receiving the detected voltage measurement information of this example is arranged on the main body part of the device 11 of this example and is formed by functionally connecting a receiving circuit of the voltage measurement information, a receiving antenna thereof, an amplifying circuit and an input circuit, and the input circuit is the input circuit of the voltage measurement information of the device. The detailed configuration of the device 11 and/or the slave unit 12 with which at least one piece of the voltage measurement information detected is wirelessly transmitted is as follows: the structure of the extension set for wirelessly sending and detecting the voltage metering information is formed by connecting a sampling circuit, an analog/digital conversion circuit 19 controlled by a controller 18, a digital processing module (a)24, an interface circuit (a)25, a wireless data transmission communication module (a)26 and a sending antenna function thereof; the corresponding device 11 of this embodiment has a structure with a mechanism for wirelessly receiving and detecting voltage measurement information: the wireless data transmission communication system is formed by functionally connecting a wireless data transmission communication module (b)27, a receiving antenna thereof, an interface circuit (b)28, a digital processing module (b)29 and an input circuit. The wireless transmission detection voltage measurement information mechanism of this example has a structure having an analog/digital conversion circuit 19 controlled by a digital processing mechanism controller 18, and then collects the detected voltage measurement information to the device by wireless transmission without error or with error as small as negligibly. The circuits of the wireless transmission detection voltage metering information mechanism can be designed and manufactured by using the existing known and common technical contents and the known and common commercial electronic circuit parts, and can be used or adopted as long as the circuits can complete or realize the functions of the circuits.
The operation process of the device 11 of this example for online real-time metering or detecting the measured secondary loop composite error is as follows: the user electric energy meter 10 measures or detects the electric energy information (8, 9 sampling ends) at the position, the device 11 arranged at the position of the user electric energy meter simultaneously measures or detects the current information (9 sampling end) at the position of the electric energy meter in the same time period and the voltage information at the end part (7 sampling end) at the PT starting position of the secondary circuit to be measured in the same time period, and the measuring accessory 12 collects the sampled or detected voltage measuring information to the device 11 in a wired transmission or wireless sending/receiving mode in real time without error or with negligible error, and the difference of the electric energy measured by the devices (10 and 11) of the device 11 and the user electric energy meter 10 is the comprehensive error of the electric energy measurement of the secondary circuit. The detection accessories of the device 11 are: the detection terminal 12, the slave unit 12 that transmits the detected voltage measurement information by wire, or the slave unit 12 that transmits the detected voltage measurement information by wireless. The working process is finished.
Second embodiment, comprehensive error detection method and device for secondary circuit of electric energy metering
The content of the embodiment comprises two parts, wherein one part relates to a comprehensive error detection method of the electric energy metering secondary circuit, and the other part relates to a comprehensive error detection device of the electric energy metering secondary circuit.
Method for detecting comprehensive error of secondary circuit of electric energy metering
The method for detecting the comprehensive error of the electric energy metering secondary circuit is a method for accurately detecting the comprehensive error of the electric energy metering secondary circuit on line in real time, and the specific situation is shown in the attached figure 1 of the specification. One of the methods for detecting the comprehensive error of the secondary loop of the electric energy metering as shown in fig. 1 is as follows: the user electric energy meter 10 measures or detects the electric energy information (8, 9 sampling ends) at the position, the electric energy metering instrument 11 arranged at the position of the user electric energy meter simultaneously measures or detects the current information (9 sampling end) at the position of the electric energy meter in the same time period and the voltage information at the end part (7 sampling end) at the PT starting position of the secondary circuit to be measured in the same time period, the electric energy metering instrument 11 of the example collects the sampled or detected voltage metering information to the electric energy metering instrument 11 in a wired transmission mode in real time, without error or with error as small as negligibly, and the difference between the electric energy measured by the two instruments 10 and 11 is the comprehensive error of the electric energy measurement of the secondary circuit. The embodiment is characterized in that: first, the electric energy measuring instrument 11 in this example is an electric energy measuring device field detector with patent number ZL 200420016518.6; second, the measurement accessory 12 of the electric energy meter 11 of this embodiment is one or two measurement terminals 12 and cables thereof for measuring voltage measurement information in real time without error or with negligible error, and these measurement terminals and cables thereof have fixed electrical configuration parameters and fixed known measurement error values and are subtracted therefrom, and thus become error-free or error-negligible in the measurement. The rest of the components which are not described are all the same as those described in the first embodiment and are not repeated.
Electric energy metering secondary loop comprehensive error detection device
The specific structure of the electric energy metering secondary circuit comprehensive error detection device of this example is shown in fig. 2. The main body part (11 in fig. 2) of the device is provided with mechanisms and structures for electric energy metering or detection, and as for the mechanisms and structures for electric energy metering or detection, which mechanisms and structures can be solved and designed by the existing known and common technical content, the details are not needed. The device 11 of this example is characterized in that: the device 11 of this example may have one or two detection terminals 12 for detecting voltage measurement information in real time with no or negligible error and its cable, one of which may be a spare part. The structure of the detection terminal 12 for detecting voltage measurement information in this example is: the cable connected with the detection input end of the device 11 and the sampling detection end of the end part of the cable are provided, the sampling detection end is the connection end of a direct voltage three-phase secondary cable, and the connection terminal is a known technology, so that the sampling precision is high. The detailed structure of the detection terminal 12 in this example is: the detection cable of the detection end 12 and the sampling detection end have fixed structures, such as fixed cable length, fixed detection end head, fixed electrical structure parameters and the like, so that the detection error caused by the detection end 12 when detecting the voltage metering information is fixed and known, can be deducted in the detection, and becomes error-free or error-negligibly small in the metering. The rest of the components which are not described are all the same as those described in the first embodiment and are not repeated.
Third embodiment, comprehensive error detection method and device for secondary circuit of electric energy metering
The content of the embodiment has two parts, one is about the comprehensive error detection method of the electric energy metering secondary circuit, and the other is about the comprehensive error detection device of the electric energy metering secondary circuit.
Method for detecting comprehensive error of secondary circuit of electric energy metering
The method for detecting the comprehensive error of the electric energy metering secondary circuit is a method for accurately detecting the comprehensive error of the electric energy metering secondary circuit on line in real time, and the specific situation is shown in the attached figure 1 of the specification. One of the methods for detecting the comprehensive error of the secondary loop of the electric energy metering as shown in fig. 1 is as follows: the user electric energy meter 10 measures or detects the electric energy information (8, 9 sampling ends) at the position, the electric energy measuring instrument 11 arranged at the position of the user electric energy meter simultaneously measures or detects the current information (9 sampling end) at the position of the electric energy meter in the same time period and the voltage information at the end part (7 sampling end) at the PT starting position of the secondary circuit to be measured in the same time period, the electric energy measuring instrument 11 of the example collects the sampled or detected voltage measuring information to the electric energy measuring instrument 11 in a wired transmission mode in real time without error or with negligible error through a detection accessory 12 of the electric energy measuring instrument, and the difference between the electric energy measured by the two instruments 10 and 11 is the comprehensive error of the electric energy measurement of the secondary circuit. The device 11 of the present example is characterized in that: firstly, the electric energy metering instrument 11 of this example is the comprehensive error detection device of the electric energy metering secondary circuit of the invention; secondly, the detecting accessory 12 of the electric energy meter 11 of this example is one or two slave units 12 for wired transmission of the detected voltage metering information in real time without or with negligible error, the slave units 12 are connected with the main body of the device 11 of this example by a transmission wired cable, and each slave unit of this example is composed of an electronic mechanism, for example, composed of various electronic components, devices, assemblies, components, integrated circuit blocks, electronic circuits, software programs, and the like; third, the slave unit 12 of the present example, which transmits the detected voltage measurement information by wire, has a digitizing means, and the slave unit 12 performs digitizing processing on the sampled or detected voltage measurement information and then collects the result to the device 11 of the present example by wire transmission with no error or with an error as small as negligible. The rest of the parts which are not described are all the same as those in the first embodiment and the second embodiment, and are not repeated.
Electric energy metering secondary loop comprehensive error detection device
The specific structure of the electric energy metering secondary circuit comprehensive error detection device of this example is shown in fig. 3. The main body part (11 in the figure) of the device is provided with mechanisms and structures for measuring or detecting the electric energy, and the mechanisms and the structures for measuring or detecting the electric energy can be solved and designed by the prior known and common technical content without needing to be described in more detail. The device 11 of this example is characterized in that: the device 11 of this example can be provided with one or two wired transmission extensions 12 for detecting voltage metering information in real time without error or with negligible error, and the structure of the wired transmission extension 12 for detecting voltage metering information of this example is formed by connecting a sampling circuit, an analog/digital conversion circuit 19 controlled by a controller 18, 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 wired transmission slave units 12 of this example each have an analog/digital conversion circuit 19 controlled by a digitizer controller 18, and can collect the detected voltage measurement information on the device 11 of this example by wired transmission with no error or with an error as small as negligibly small. The circuits of the extension 12 of the present example can be designed and manufactured by using the existing well-known and commonly used technical contents and well-known and commercially available electronic circuit components, as long as they can be used or adopted to complete or realize the functions of the circuits. The rest of the parts which are not described are all the same as those in the first embodiment and the second embodiment, and are not repeated.
Fourth embodiment, comprehensive error detection method and device for secondary circuit of electric energy metering
The content of the embodiment has two parts, one is about the comprehensive error detection method of the electric energy metering secondary circuit, and the other is about the comprehensive error detection device of the electric energy metering secondary circuit.
Method for detecting comprehensive error of secondary circuit of electric energy metering
The method for detecting the comprehensive error of the electric energy metering secondary circuit is a method for accurately detecting the comprehensive error of the electric energy metering secondary circuit on line in real time, and the specific situation is shown in the attached figure 1 of the specification. One of the methods for detecting the comprehensive error of the secondary loop of the electric energy metering as shown in fig. 1 is as follows: the user electric energy meter 10 measures or detects the electric energy information (8, 9 sampling ends) at the position, the electric energy metering instrument 11 arranged at the position of the user electric energy meter simultaneously measures or detects the current information (9 sampling ends) at the position of the electric energy meter in the same time period and the voltage information at the end part (7 sampling end) at the PT starting position of the secondary circuit to be measured in the same time period, the electric energy metering instrument 11 of the example collects the sampled or detected voltage metering information to the electric energy metering instrument 11 in a wireless sending/receiving mode in real time, without error or with small error to be neglected, and the difference between the two instruments 10 and 11 for metering the electric energy is the comprehensive error of the electric energy metering of the secondary circuit. The device 11 of the present example is characterized in that: firstly, the electric energy metering instrument 11 of this example is the comprehensive error detection device of the electric energy metering secondary circuit of the invention; secondly, the detecting accessory 12 of the electric energy meter 11 of the example is one or two slave units 12 which wirelessly transmit the detected voltage metering information in real time without error or with negligible error, the slave units 12 are in wireless transmission/reception communication with the main body of the device 11 of the example, and each slave unit of the example is composed of an electronic mechanism which is formed by assembling various electronic elements, devices, assemblies, components, integrated circuit blocks, electronic circuits, software programs and the like; third, the slave unit 12 of the present example wirelessly transmits the detected voltage measurement information has a digitizing means, and the slave unit 12 digitizes the sampled or detected voltage measurement information and then collects the digitized or detected voltage measurement information to the device 11 of the present example wirelessly with no error or with an error that is negligibly small. The rest of the parts which are not described are all the same as those in the first embodiment, the second embodiment and the third embodiment, and are not repeated.
Electric energy metering secondary loop comprehensive error detection device
The specific structure of the electric energy metering secondary circuit comprehensive error detection device of this example is jointly shown in fig. 5 and 7. The main body part (11 in the two figures) of the device is provided with mechanisms and structures for measuring or detecting the electric energy, and the mechanisms and the structures for measuring or detecting the electric energy can be solved and designed by the prior known and common technical content without needing to be described in more detail. The device 11 of this example is characterized in that: the device 11 of the example can be provided with one or two wireless transmitting extensions 12 for detecting the voltage metering information in real time without error or with negligible error, and the structure of the wireless transmitting extension 12 for detecting the voltage metering information of the example is formed by connecting a sampling circuit, an analog/digital conversion circuit 19 controlled by a controller 18, a digital modulation circuit 30, a frequency conversion circuit 31, an amplifying and transmitting circuit 32 and a transmitting antenna function thereof; the corresponding device 11 of this embodiment is equipped with a mechanism and structure for wirelessly receiving and detecting voltage measurement information, which is composed of a receiving and frequency conversion circuit 33 and its receiving antenna, a digital demodulation circuit 34, and an input circuit. The wireless transmitter slave units 12 of this example each have an analog/digital conversion circuit 19 controlled by a digitizing means controller 18, and can wirelessly collect the detected voltage measurement information to the device 11 of this example with no or negligible error. The circuits of the slave wireless transmitter 12 of this example can be designed and manufactured using known and commonly used technical contents and known and commercially available electronic circuit components, as long as they can be used or employed to perform or realize the functions of the circuits. The rest of the parts which are not described are all the same as those in the first embodiment, the second embodiment and the third embodiment, and are not repeated.
Fifth embodiment, comprehensive error detection method and device for secondary circuit of electric energy metering
The content of the embodiment is two parts, wherein one part is about the comprehensive error detection method of the electric energy metering secondary circuit, and the other part is about the comprehensive error detection device of the electric energy metering secondary circuit.
Method for detecting comprehensive error of secondary circuit of electric energy metering
The method for detecting the comprehensive error of the electric energy metering secondary circuit is a method for accurately detecting the comprehensive error of the electric energy metering secondary circuit on line in real time, and the specific situation is shown in the attached figure 1 of the specification. The method for detecting the comprehensive error of the electric energy metering secondary circuit shown in the figure 1 is characterized in that: firstly, the electric energy metering instrument 11 of this example is the comprehensive error detection device of the electric energy metering secondary circuit of the invention; secondly, the detection accessory 12 of the electric energy meter 11 of this embodiment has two, one is the detection terminal 12 and its cable for detecting the voltage measurement information in real time without error or with negligible error, and the other is the extension 12 for wire-transmitting the detected voltage measurement information in real time without error or with negligible error. The rest of the parts which are not described are all the same as those in the first embodiment, the second embodiment, the third embodiment and the fourth embodiment, and are not repeated.
Electric energy metering secondary loop comprehensive error detection device
The specific structure of the electric energy metering secondary circuit comprehensive error detection device of this example is shown by fig. 2 and 3 in combination. The main body part (11 in the two figures) of the device is provided with a mechanism and a structure for measuring or detecting electric energy, and the device 11 of the embodiment is characterized in that: first, the device 11 of this example is, for example, an electric energy metering device field detector (patent No. ZL 200420016518.6); secondly, the device 11 of this embodiment can be provided with two detection accessories 12, one is a detection end 12 for detecting voltage measurement information in real time without error or with negligible error and the cable thereof, and the detection cable of the detection end 12 and the sampling detection end have a fixed structure. One is the extension 12 that transmits the sensed voltage metering information in real time, error-free or error-negligible by wire. The wired transmission detection voltage metering information extension 12 is composed of a digital sampling circuit, a digital amplifying circuit, a transmission circuit, an interface circuit and a digital input circuit which are connected one by one, and the digital transmission circuit of the wired transmission detection voltage metering information extension 12 can directly collect the detected voltage metering information to the device 11 by wired transmission without error or with error as small as negligibly small. The rest of the parts which are not described are all the same as those in the first embodiment, the second embodiment, the third embodiment and the fourth embodiment, and are not repeated.
Sixth embodiment, method and device for detecting comprehensive errors of electric energy metering secondary circuit
The content of the embodiment has two parts, one is about the comprehensive error detection method of the electric energy metering secondary circuit, and the other is about the comprehensive error detection device of the electric energy metering secondary circuit.
Method for detecting comprehensive error of secondary circuit of electric energy metering
The method for detecting the comprehensive error of the electric energy metering secondary circuit is a method for accurately detecting the comprehensive error of the electric energy metering secondary circuit on line in real time, and the specific situation is shown in the attached figure 1 of the specification. The method for detecting the comprehensive error of the electric energy metering secondary circuit shown in the figure 1 is characterized in that: first, the electric energy measuring instrument 11 of this example is, for example, an electric energy measuring device field detector (patent No. ZL 200420016518.6); secondly, the detection accessory 12 of the electric energy meter 11 of this embodiment has two, one is the detection terminal 12 and its cable for detecting the voltage measurement information in real time without error or with negligible error, and the other is the extension 12 for wirelessly transmitting the detected voltage measurement information in real time without error or with negligible error. The corresponding device 11 of this embodiment is also provided with a mechanism and a structure for wirelessly receiving the detected voltage measurement information. The rest of the parts which are not described are all the same as those in the first embodiment, the second embodiment, the third embodiment, the fourth embodiment and the fifth embodiment, and are not repeated.
Electric energy metering secondary loop comprehensive error detection device
The specific structure of the electric energy metering secondary circuit comprehensive error detection device of this example is shown by fig. 2 and 5 in combination. The main body part (11 in the two figures) of the device is provided with a mechanism and a structure for measuring or detecting electric energy, and the device 11 of the embodiment is characterized in that: the device 11 of this example may be provided with two detection accessories 12: one is a detection terminal 12 and its cable for detecting voltage measurement information in real time without error or with negligible error, and the detection cable of the detection terminal 12 and the sampling detection terminal have a fixed structure. One is the slave set 12 that wirelessly transmits the sensed voltage metering information in real time, without error or with negligible error. The wireless transmitting detection voltage metering information extension 12 is structurally composed of a digital sampling circuit, a digital amplifying circuit and a transmitting antenna thereof in functional connection. The corresponding device 11 is also provided with a mechanism and a structure for wirelessly receiving and detecting voltage metering information: the digital receiving amplifying circuit, the receiving antenna and the digital input circuit are functionally connected. They are not shown in detail. The digital circuit structure of the extension set 12 for wirelessly transmitting and detecting the voltage metering information can directly gather the detected voltage metering information to the device 11 in a wireless transmission/receiving mode without error or with error as small as negligibly. The rest of the parts which are not described are all the same as those in the first embodiment, the second embodiment, the third embodiment, the fourth embodiment and the fifth embodiment, and are not repeated.
Seventh embodiment, method and device for detecting comprehensive errors of electric energy metering secondary circuit
The content of the embodiment has two parts, one is about the comprehensive error detection method of the electric energy metering secondary circuit, and the other is about the comprehensive error detection device of the electric energy metering secondary circuit.
Method for detecting comprehensive error of secondary circuit of electric energy metering
The specific situation of the method for detecting the comprehensive error of the electric energy metering secondary circuit is shown in the attached figure 1 in the specification. The method for detecting the comprehensive error of the electric energy metering secondary circuit shown in the figure 1 is characterized in that: the detection accessory 12 of the electric energy metering apparatus 11 of this example has two: one is the extension 12 that transmits the sensed voltage metering information in real time, error-free or error-negligible by wire. One is the slave set 12 that wirelessly transmits the sensed voltage metering information in real time, without error or with negligible error. The corresponding device 11 of this embodiment is also provided with a mechanism and a structure for wirelessly receiving the detected voltage measurement information. The rest of the parts which are not described are all the same as those in the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment and the sixth embodiment, and are not repeated.
Electric energy metering secondary loop comprehensive error detection device
The specific structure of the electric energy metering secondary circuit comprehensive error detection device of this example is shown by fig. 3 and 5 in combination. The device 11 of this example is characterized in that: the device 11 of this example may be provided with two detection accessories 12: one is the extension 12 which transmits the detected voltage metering information in real time and in a wired way without error or with negligible error, and the structure of the wired transmission detection voltage metering information mechanism of the example is composed of a digital output end, a wired transmission cable line and a digital input end. One is the slave set 12 that wirelessly transmits the sensed voltage metering information in real time, without error or with negligible error. The corresponding device 11 of this embodiment is also provided with a mechanism and a structure for wirelessly receiving the detected voltage measurement information. The branch device 12 for wired transmission and detection of voltage measurement information and the branch device 12 for wireless transmission and detection of voltage measurement information in this example have digital circuit structures, and can directly collect the detected voltage measurement information on the device by wired transmission and wireless transmission without errors or with errors as little as negligibly small. The circuits of the wired transmission slave unit 12 for detecting voltage measurement information and the wireless transmission slave unit 12 for detecting voltage measurement information can be designed and manufactured by using the existing publicly known and commonly used technical contents and the publicly known and commercially available electronic circuit components, as long as the circuits can complete or realize the functions of the circuits. The rest of the parts which are not described are all the same as those in the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment and the sixth embodiment, and are not repeated.
Eighth embodiment comprehensive error detection method and device for electric energy metering secondary circuit
The content of the embodiment has two parts, one is about the comprehensive error detection method of the electric energy metering secondary circuit, and the other is about the comprehensive error detection device of the electric energy metering secondary circuit.
Method for detecting comprehensive error of secondary circuit of electric energy metering
The specific situation of the method for detecting the comprehensive error of the electric energy metering secondary circuit is shown in the attached figure 1 in the specification. The method for detecting the comprehensive error of the electric energy metering secondary circuit shown in the figure 1 is characterized in that: the detection accessories 12 of the electric energy meter 11 of this example have three (or even more): one is the detection terminal 12 and its cable that detect the voltage measurement information in real time with no or negligible error. One is the extension 12 that transmits the sensed voltage metering information in real time, error-free or error-negligible by wire. One is the slave set 12 that wirelessly transmits the sensed voltage metering information in real time, without error or with negligible error. The corresponding device 11 of this embodiment is also provided with a mechanism and a structure for wirelessly receiving the detected voltage measurement information. The rest of the parts which are not described are all the same as those in the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment and the seventh embodiment, and are not repeated.
Electric energy metering secondary loop comprehensive error detection device
The specific structure of the electric energy metering secondary circuit comprehensive error detection device of this example is jointly shown in fig. 2 to 7. The device 11 of this example is characterized in that: the device 11 of this example may be provided with three detection accessories 12: the detection end 12 and the cable thereof can detect the voltage metering information in real time without error or with negligible error, the detection end 12 of the example has fixed cable length, fixed detection end head, fixed electrical structure parameters and the like, the detection error caused when the voltage metering information is detected is fixed and known, can be deducted in the detection, and becomes error-free or error-negligible in the metering. One is the extension 12 that transmits the sensed voltage metering information in real time, error-free or error-negligible by wire. One is the slave set 12 that wirelessly transmits the detected voltage metering information in real time, without error or with negligible error. The corresponding device 11 of this embodiment is also provided with a mechanism and a structure for wirelessly receiving the detected voltage measurement information. Both the slave unit 12 for wired transmission and detection of voltage measurement information and the slave unit 12 for wireless transmission and detection of voltage measurement information of this example have digital circuit structures, and can directly collect the detected voltage measurement information to the device 11 in a wired transmission and wireless transmission/reception manner without error or with error as small as negligibly. The various configurations of the device 11 of this example with three detection appendages 12 are those described in the previous embodiments, which are described in detail and not repeated. The circuits of the wired transmission slave unit 12 for detecting voltage measurement information and the wireless transmission slave unit 12 for detecting voltage measurement information can be designed and manufactured by using the existing publicly known and commonly used technical contents and the publicly known and commercially available electronic circuit components, as long as the circuits can complete or realize the functions of the circuits. The rest of the parts which are not described are all the same as those in the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment and the seventh embodiment, and are not repeated.
Claims (10)
1. A method for detecting the comprehensive error of an electric energy metering secondary circuit is a method for accurately detecting the comprehensive error of the electric energy metering secondary circuit on line in real time, and is characterized in that: the method for detecting the comprehensive error of the electric energy metering secondary circuit comprises the following steps: the electric energy meter measures or detects the electric energy information of the user electric energy meter, the electric energy meter arranged at the user electric energy meter simultaneously measures or detects the current information of the electric energy meter in the same time period and the voltage information of the PT starting end part of the secondary circuit to be detected in the same time period, the electric energy meter collects the voltage measuring information of the PT starting end part of the secondary circuit to be sampled or detected in the same time period to the electric energy meter in a wired transmission or wireless sending/receiving mode in real time without error or negligible error through a detection accessory of the electric energy meter, and the difference between the two instruments, namely the user electric energy meter and the electric energy meter arranged at the user electric energy meter measures the electric energy, namely the comprehensive error of the electric energy metering of the secondary circuit.
2. The electric energy metering secondary circuit comprehensive error detection method according to claim 1, characterized in that: the method for collecting the voltage metering information of the end part of the PT starting position of the secondary circuit sampled or detected in the same time period to the electric energy metering instrument in real time without error or with negligible error in a wired transmission or wireless transmission/receiving mode comprises the following steps:
a. the method for collecting the sampled or detected voltage metering information to the electric energy metering instrument in a real-time, error-free or error-negligible manner in a wired transmission mode comprises the following steps: the detection accessory and the cable of the electric energy metering 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 measurement; or
b. The method for collecting the sampled or detected voltage metering information to the electric energy metering instrument in real time in a wired transmission or wireless transmission/reception mode without error or with negligible error comprises the following steps: the voltage metering information sampled or detected by the detection accessory of the electric energy metering instrument is digitalized and then collected on the electric energy metering instrument in a wired transmission or wireless transmission/receiving method without error or with negligible error.
3. The electric energy metering secondary circuit comprehensive error detection method according to claim 2, characterized in that: the method for measuring or detecting the electric energy information of the user electric energy meter by the user electric energy meter and simultaneously measuring or detecting the current information of the same time period at the electric energy meter and the voltage information of the same time period at the end part of the PT starting position of the secondary circuit to be measured by the electric energy measuring instrument arranged at the user electric energy meter comprises the following steps: sampling, metering or detecting the electric energy represented by the pulse quantity or the digital quantity of the two tested places in the same time period, wherein the electric energy of the electric energy metering instrument is measured by synthesizing the end voltage value of the PT starting place of the tested secondary circuit and the current value of the user electric energy meter.
4. The electric energy metering secondary circuit comprehensive error detection method according to claim 3, characterized in that: the electric energy metering instrument selection scheme used in the electric energy metering secondary circuit comprehensive error detection method is as follows: the detection device for the comprehensive error of the electric energy metering secondary circuit is designed and manufactured by adopting the method for detecting the comprehensive error of the electric energy metering secondary circuit, the main body part of the device is provided with a mechanism and a structure for electric energy metering or detection, and the device is characterized in that: the device is provided with at least one detection accessory for detecting voltage metering 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 is provided with at least one detection end for detecting voltage metering information and a cable thereof;
b. the device is provided with at least one mechanism for wire transmission or/and wireless transmission of detected voltage metering information, wherein the mechanism is composed of electronic mechanisms, the mechanism is connected with the main body part of the device through a transmission wire cable or is in wireless transmission/reception communication, the mechanisms are split parts arranged outside the main body part of the device to form a sub-set of the device, and the sub-set is composed of a shell and the electronic mechanisms in the shell.
5. The electric energy metering secondary circuit comprehensive error detection method according to claim 4, characterized in that:
a. the structure of at least one detection end for detecting voltage metering information of the device belt is as follows: the cable is connected with the detection input end of the device and the sampling detection end of the end part of the cable;
b. the device is provided with at least one split or extension mechanism for the voltage metering information of wired transmission detection, and the detailed structure of the mechanism for the voltage metering information of wired transmission detection between the extension mechanism and the device is as follows: the device comprises a sampling circuit of voltage metering information, an analog/digital conversion circuit controlled by a controller, a transmission circuit, a transmission cable, an interface circuit, a connector and an input circuit, wherein the sampling circuit, the analog/digital conversion circuit, the transmission circuit and the transmission cable are functionally connected;
c. the said device belt at least one split or extension mechanism for wireless transmission of detected voltage metering information, the detailed structure of the wireless transmission detection voltage metering information mechanism between the extension and the device is: the sampling circuit of the voltage metering information, the analog/digital conversion circuit controlled by the controller, the transmitting circuit and the transmitting antenna thereof are functionally connected to form an extension for wirelessly transmitting the detected voltage metering information; the device is also provided with a mechanism for wirelessly receiving the detected voltage metering information, wherein the mechanism for wirelessly receiving the detected voltage metering information is arranged on the main body part of the device and is formed by functionally connecting a receiving circuit of the voltage metering information, a receiving antenna of the receiving circuit, an amplifying circuit and an input circuit, and the input circuit is the input circuit of the voltage metering information of the device.
6. The electric energy metering secondary circuit comprehensive error detection method according to claim 5, characterized in that:
1) the detailed structure of the at least one detection end for detecting the voltage metering information of the device belt is as follows: the detection cable of the detection end and the sampling detection end are provided with fixed structures;
2) the detailed structure of the wired transmission detection voltage metering information mechanism between the extension and the device is as follows:
a. the structure of the wired transmission detection voltage metering information mechanism 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 wired transmission detection voltage metering information mechanism 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, a photoelectric conversion interface circuit, an amplifying circuit and an input circuit one by one; or,
c. the structure of the wired transmission voltage measurement information detection mechanism is formed by connecting a digital sampling circuit, a digital amplifying circuit, a transmission circuit, an interface circuit and a digital input circuit one by one; or,
d. the structure of the wired transmission detection voltage metering information mechanism is composed of a digital output end, a wired transmission cable and a digital input end;
3) the sub-unit of the at least one wireless transmission detection voltage measurement information of the device belt, the sub-unit and the device wireless transmission/reception detection voltage measurement information mechanism have the following detailed structure:
a. the structure of the wireless transmission detection voltage metering information mechanism 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 mechanism and the structure for wirelessly receiving and detecting the voltage metering information are formed by functionally connecting a wireless data transmission communication module, a receiving antenna thereof, a digital processing module and an input circuit; or,
b. the structure of the wireless transmission detection voltage metering information mechanism 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 mechanism and the structure for wirelessly receiving and detecting the voltage metering information are formed by functionally connecting a receiving and frequency conversion circuit, a receiving antenna thereof, a digital demodulation circuit and an input circuit; or,
c. the structure of the wireless voltage measurement information sending and detecting mechanism is formed by connecting a digital sampling circuit, a digital amplifying circuit and a sending antenna function thereof; the mechanism and the structure for wirelessly receiving and detecting the voltage metering information are formed by functionally connecting a digital receiving amplifying circuit, a receiving antenna thereof and a digital input circuit.
7. The utility model provides an electric energy measurement secondary circuit comprehensive error detection device, the device's main part has mechanism and the structure that electric energy measurement or detected, characterized in that:
a. the device is provided with at least one detection end for detecting voltage metering information in real time without error or with negligible error and a cable thereof;
b. the device is provided with at least one mechanism for real-time, error-free or error-negligible wired transmission or/and wireless transmission of detected voltage metering information, the mechanisms are all composed of electronic mechanisms, the mechanisms are connected with the main body part of the device through a wired cable for transmission or wirelessly transmitted/received, 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 electric energy metering secondary circuit comprehensive error detection device according to claim 7, characterized in that:
a. the structure of at least one detection end for detecting voltage metering information of the device belt is as follows: the cable is connected with the detection input end of the device and the sampling detection end of the end part of the cable;
b. the device is provided with at least one split or extension mechanism for the voltage metering information of wired transmission detection, and the detailed structure of the mechanism for the voltage metering information of wired transmission detection between the extension mechanism and the device is as follows: the device comprises a voltage measuring circuit, a controller-controlled analog/digital conversion circuit, a transmission cable, an interface circuit, a connector and an input circuit, wherein the voltage measuring circuit is functionally connected with the controller-controlled analog/digital conversion circuit, the transmission cable, the interface circuit, the connector and the input circuit;
c. the said device belt at least one split or extension mechanism for wireless transmission of detected voltage metering information, the detailed structure of the wireless transmission detection voltage metering information mechanism between the extension and the device is: the sampling circuit of the voltage metering information, the analog/digital conversion circuit controlled by the controller, the transmitting circuit and the transmitting antenna thereof are functionally connected to form an extension for wirelessly transmitting the detected voltage metering information; the device is also provided with a mechanism for wirelessly receiving the detected voltage metering information, wherein the mechanism for wirelessly receiving the detected voltage metering information is arranged on the main body part of the device and is formed by functionally connecting a receiving circuit of the voltage metering information, a receiving antenna of the receiving circuit, an amplifying circuit and an input circuit, and the input circuit is the input circuit of the voltage metering information of the device.
9. The electric energy metering secondary circuit comprehensive error detection device according to claim 8, characterized in that:
1) the detailed structure of the at least one detection end for detecting the voltage metering information of the device belt is as follows: the detection cable of the detection end and the sampling detection end are provided with fixed structures;
2) the detailed structure of the wired transmission detection voltage metering information mechanism between the extension and the device is as follows:
a. the structure of the wired transmission detection voltage metering information mechanism 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 wired transmission detection voltage metering information mechanism 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, a photoelectric conversion interface circuit, an amplifying circuit and an input circuit one by one; or,
c. the structure of the wired transmission voltage measurement information detection mechanism is formed by connecting a digital sampling circuit, a digital amplifying circuit, a transmission circuit, an interface circuit and a digital input circuit one by one; or,
d. the structure of the wired transmission voltage measurement information detection mechanism is composed of a digital output end, a wired transmission cable and a digital input end.
10. The electric energy metering secondary circuit comprehensive error detection device according to claim 8, characterized in that: the sub-unit of the voltage measuring information wirelessly transmitted and detected by at least one of the devices, the sub-unit and the device wirelessly transmit/receive the detected voltage measuring information mechanism, the detailed structure of which is as follows:
a. the structure of the wireless transmission detection voltage metering information mechanism 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 mechanism and the structure for wirelessly receiving and detecting the voltage metering information are formed by functionally connecting a wireless data transmission communication module, a receiving antenna thereof, a digital processing module and an input circuit; or,
b. the structure of the wireless transmission detection voltage metering information mechanism 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 mechanism and the structure for wirelessly receiving and detecting the voltage metering information are formed by functionally connecting a receiving and frequency conversion circuit, a receiving antenna thereof, a digital demodulation circuit and an input circuit; or,
c. the structure of the wireless voltage measurement information sending and detecting mechanism is formed by connecting a digital sampling circuit, a digital amplifying circuit and a sending antenna function thereof; the mechanism and the structure for wirelessly receiving and detecting the voltage metering information are formed by functionally connecting a digital receiving amplifying circuit, a receiving antenna thereof and a digital input circuit.
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| CN103344938A (en) * | 2013-06-22 | 2013-10-09 | 国家电网公司 | Test clamp meter with large check range |
| CN106226727A (en) * | 2016-09-19 | 2016-12-14 | 国网天津市电力公司 | User's electric energy metering error on-line checking analyzes system and method |
| CN109521242A (en) * | 2018-12-29 | 2019-03-26 | 重庆睿伊互感器研究院有限公司 | A method of reducing secondary connection potential faults |
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| CN2496026Y (en) * | 2001-08-15 | 2002-06-19 | 胡大林 | Voltage drop error electricity quatity integrating instrument for secondary circuit of voltage mutual inductor |
| CN2720451Y (en) * | 2003-09-01 | 2005-08-24 | 成都正惠电气投资发展公司 | Digital PT secondary voltage-drop automatic metering compensator |
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| CN2496026Y (en) * | 2001-08-15 | 2002-06-19 | 胡大林 | Voltage drop error electricity quatity integrating instrument for secondary circuit of voltage mutual inductor |
| CN2720451Y (en) * | 2003-09-01 | 2005-08-24 | 成都正惠电气投资发展公司 | Digital PT secondary voltage-drop automatic metering compensator |
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