CN112710883A - Method for checking mutual inductor to steal electricity - Google Patents

Method for checking mutual inductor to steal electricity Download PDF

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Publication number
CN112710883A
CN112710883A CN202011389866.8A CN202011389866A CN112710883A CN 112710883 A CN112710883 A CN 112710883A CN 202011389866 A CN202011389866 A CN 202011389866A CN 112710883 A CN112710883 A CN 112710883A
Authority
CN
China
Prior art keywords
phase
current value
current transformer
rogowski coil
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011389866.8A
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Chinese (zh)
Inventor
王宇婷
李曼
杨佳
杨璐
李璐
王庆
郭鑫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuxin Power Supply Company State Grid Liaoning Electric Power Co ltd
State Grid Corp of China SGCC
Original Assignee
Fuxin Power Supply Company State Grid Liaoning Electric Power Co ltd
State Grid Corp of China SGCC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuxin Power Supply Company State Grid Liaoning Electric Power Co ltd, State Grid Corp of China SGCC filed Critical Fuxin Power Supply Company State Grid Liaoning Electric Power Co ltd
Priority to CN202011389866.8A priority Critical patent/CN112710883A/en
Publication of CN112710883A publication Critical patent/CN112710883A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R11/00Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
    • G01R11/02Constructional details
    • G01R11/24Arrangements for avoiding or indicating fraudulent use

Abstract

A method for checking mutual inductor electricity stealing is capable of accurately identifying specific abnormal users and preventing electricity stealing of high-supply high-count current mutual inductors. The method comprises the following steps: sequentially sleeving three Rogowski coils on K of three-phase current transformer of electricity consumer1Measuring, and sequentially sleeving three Rogowski coils on a three-phase current transformer K2End, measure again, the measuring device displays IA/Ia,IB/Ib,IC/IcChecking that the ratio is consistent with the multiplying power of the nameplate or the electric energy meter; sequentially sleeving any Rogowski coil on K of three-phase current transformer1And K2End, pass if the measurement device display current indication is zero; otherwise, at least one end is broken; sleeving the first Rogowski coil on the phase K of the phase A of the current transformer1And a third Rogowski coil is sleeved on the K of the C phase of the current transformer1A terminal; at the moment, the current value display is a B-phase secondary current value, and if the current value is consistent with the A-phase secondary current value and the C-phase secondary current value, the current value is normal; otherwise, the connection is reversed.

Description

Method for checking mutual inductor to steal electricity
Technical Field
The invention relates to a method for checking the electricity stealing of a mutual inductor, belonging to the technical field of electricity stealing prevention.
Background
With the development of the power industry and the progress of science and technology, various electricity stealing technical methods are updated. Nowadays, electricity consumers not only steal electricity on the electricity meter, but also steal electricity by using a mutual inductor (especially a current mutual inductor), and the electricity stealing phenomenon is not enough to prevent. The electricity stealing users cannot be identified timely and accurately only by the line loss monitor in the transformer area.
The transformer area line loss monitor is used for storing and performing simple power consumption analysis by collecting information of electric energy meters of power consumption customers. And analyzing whether the user uses electricity in an unconventional electricity utilization and electricity stealing mode or not according to field collected electricity utilization data by combining background analysis software, positioning the position of the user according to the table number, and further performing field check to determine the suspected user of abnormal electricity utilization. The method is not timely and accurate in judgment, and needs to find the abnormal problem in the transformer area and determine the specific power consumption customer, so that the aim of checking and stealing the electricity cannot be fulfilled.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a method for detecting the electricity stealing of a mutual inductor, which has strong universality and simple and convenient operation, can accurately identify specific abnormal users, and can prevent the electricity stealing of the high-supply high-count current mutual inductor.
The technical solution of the invention is as follows: a method for checking mutual inductor and stealing electricity is characterized in that: (1) testing whether the actual variable ratio is consistent with the nameplate of the electric energy meter, namely whether the multiplying power of the electric energy meter is correct or not;
sequentially sleeving the Rogowski coil L1, the Rogowski coil L2 and the Rogowski coil L3 on three power consumers A, B, CPhase current transformer K1And the measuring device is utilized to start measurement, and then the three Rogowski coils are sequentially sleeved on the A, B, C three-phase current transformer K2When the measurement is performed again, the measurement device will display IA/Ia,IB/Ib,IC/IcChecking that the ratio is consistent with the multiplying power of the nameplate or the electric energy meter;
(2) testing for phase loss
Sequentially sleeving any Rogowski coil on K of A, B, C three-phase current transformer1And K2End, pass if the measurement device display current indication is zero; if the display current is not zero, the phase K of the user current transformer is shown1Or K2At least one end of the terminal is disconnected, and the electric energy meter charges one third of the electric quantity at the moment;
(3) testing whether three-phase reverse connection phenomenon exists
Sleeving the Rogowski coil L1 on the K of the A phase of the client current transformer1The Rogowski coil L3 is sleeved on the K of the C phase of the client current transformer1A terminal; at the moment, the current value displayed by the display of the measuring device is a B-phase secondary current value, and if the magnitude of the current value is consistent with the A-phase secondary current value and the C-phase secondary current value, the current value is normal; if the B-phase secondary current value is 1.75 times of the A-phase or C-phase secondary current value, the A-phase and C-phase secondary terminals of the user current transformer are reversely connected.
The invention has the beneficial effects that: the abnormal user information can be timely and accurately searched, the Rogowski coil is adopted for measurement, the abnormal electric energy change condition of the Rogowski coil is convenient to rapidly monitor, the monitoring numerical value is more accurate and rapid through a high-precision measurement mode, and the current transformer wrong wiring checking and electricity stealing mode is broken through.
Drawings
FIG. 1 is a schematic diagram of the circuit structure of the measuring device of the present invention;
FIG. 2 is an external view of the measuring device;
fig. 3 is a wiring diagram of the present invention.
Detailed Description
As shown in the figure, the method for checking mutual inductor and stealing electricity comprises the following steps:
(1) testing whether the actual variable ratio is consistent with the nameplate of the electric energy meter, namely whether the multiplying power of the electric energy meter is correct or not;
sequentially sleeving the Rogowski coil L1, the Rogowski coil L2 and the Rogowski coil L3 on the K of the three-phase current transformer of the power consumer A, B, C1And the measuring device is used for starting measurement and consists of a signal processing module, an analog-to-digital conversion module, a main processor, a liquid crystal display module, a key processing module, a communication module and a data storage module, and then three Rogowski coils are sequentially sleeved on the A, B, C three-phase current transformer K2When the measurement is performed again, the measurement device will display IA/Ia,IB/Ib,IC/IcChecking that the ratio is consistent with the multiplying power of the nameplate or the electric energy meter;
(2) testing for phase loss
Sequentially sleeving any Rogowski coil on K of A, B, C three-phase current transformer1And K2End, pass if the measurement device display current indication is zero; if the display current is not zero, the phase K of the user current transformer is shown1Or K2At least one end of the terminal is disconnected, and the electric energy meter charges one third of the electric quantity at the moment;
(3) testing whether three-phase reverse connection phenomenon exists
Sleeving the Rogowski coil L1 on the K of the A phase of the client current transformer1The Rogowski coil L3 is sleeved on the K of the C phase of the client current transformer1A terminal; at the moment, the current value displayed by the display of the measuring device is a B-phase secondary current value, and if the magnitude of the current value is consistent with the A-phase secondary current value and the C-phase secondary current value, the current value is normal; if the B-phase secondary current value is 1.75 times of the A-phase or C-phase secondary current value, the A-phase and C-phase secondary terminals of the user current transformer are reversely connected.
The above description is only exemplary of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. A method for checking mutual inductor to steal electricity is characterized in that:
step 1, testing whether the actual variable ratio is consistent with an electric energy meter nameplate, namely whether the multiplying power of the electric energy meter is correct or not;
sequentially sleeving the Rogowski coil L1, the Rogowski coil L2 and the Rogowski coil L3 on the K of the three-phase current transformer of the power consumer A, B, C1And the measuring device is utilized to start measurement, and then the three Rogowski coils are sequentially sleeved on the A, B, C three-phase current transformer K2When the measurement is performed again, the measurement device will display IA/Ia,IB/Ib,IC/IcChecking that the ratio is consistent with the multiplying power of the nameplate or the electric energy meter;
step 2 testing whether phase failure exists
Sequentially sleeving any Rogowski coil on K of A, B, C three-phase current transformer1And K2End, pass if the measurement device display current indication is zero; if the display current is not zero, the phase K of the user current transformer is shown1Or K2At least one end of the terminal is disconnected, and the electric energy meter charges one third of the electric quantity at the moment;
step 3, testing whether three phases are connected reversely
Sleeving the Rogowski coil L1 on the K of the A phase of the client current transformer1The Rogowski coil L3 is sleeved on the K of the C phase of the client current transformer1A terminal; at the moment, the current value displayed by the display of the measuring device is a B-phase secondary current value, and if the magnitude of the current value is consistent with the A-phase secondary current value and the C-phase secondary current value, the current value is normal; if the B-phase secondary current value is 1.75 times of the A-phase or C-phase secondary current value, the A-phase and C-phase secondary terminals of the user current transformer are reversely connected.
CN202011389866.8A 2020-12-02 2020-12-02 Method for checking mutual inductor to steal electricity Pending CN112710883A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011389866.8A CN112710883A (en) 2020-12-02 2020-12-02 Method for checking mutual inductor to steal electricity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011389866.8A CN112710883A (en) 2020-12-02 2020-12-02 Method for checking mutual inductor to steal electricity

Publications (1)

Publication Number Publication Date
CN112710883A true CN112710883A (en) 2021-04-27

Family

ID=75543394

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011389866.8A Pending CN112710883A (en) 2020-12-02 2020-12-02 Method for checking mutual inductor to steal electricity

Country Status (1)

Country Link
CN (1) CN112710883A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2343589Y (en) * 1998-08-13 1999-10-13 湖南凤凰园电子通讯研究所 Electric energy meter capable of preventing fraudulent use of electricity
CN103645415A (en) * 2013-12-11 2014-03-19 国家电网公司 Practical method of inspecting electric energy metering device wiring in charged mode
CN103954883A (en) * 2014-05-21 2014-07-30 中国化学工程第十一建设有限公司 Voltage transformer secondary connection inspecting method and device
CN203811663U (en) * 2014-04-30 2014-09-03 国网上海市电力公司 Wireless current detection unit used for electricity larceny prevention
CN108957079A (en) * 2018-10-11 2018-12-07 国网冀北电力有限公司唐山供电公司 A kind of electricity filching detector and its application method
US20200309840A1 (en) * 2019-04-01 2020-10-01 Dake He Error Detection Wiring Circuit and Switching Device for Instrument Transformers in Distribution Power Grid

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2343589Y (en) * 1998-08-13 1999-10-13 湖南凤凰园电子通讯研究所 Electric energy meter capable of preventing fraudulent use of electricity
CN103645415A (en) * 2013-12-11 2014-03-19 国家电网公司 Practical method of inspecting electric energy metering device wiring in charged mode
CN203811663U (en) * 2014-04-30 2014-09-03 国网上海市电力公司 Wireless current detection unit used for electricity larceny prevention
CN103954883A (en) * 2014-05-21 2014-07-30 中国化学工程第十一建设有限公司 Voltage transformer secondary connection inspecting method and device
CN108957079A (en) * 2018-10-11 2018-12-07 国网冀北电力有限公司唐山供电公司 A kind of electricity filching detector and its application method
US20200309840A1 (en) * 2019-04-01 2020-10-01 Dake He Error Detection Wiring Circuit and Switching Device for Instrument Transformers in Distribution Power Grid

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