Measurement loop wiring error determination method and device

A technology of wrong wiring and measurement loop, applied in measuring devices, measuring electrical variables, instruments, etc., can solve the problems of wrong wiring of measurement loop and low efficiency of detection methods, so as to improve the detection efficiency and save the steps of disconnecting and connecting wires.

Active Publication Date: 2017-08-29
QUJING POWER SUPPLY BUREAU YUNNAN POWER GRID CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] This application provides a method and device for judging the wiring error of the metering circuit to solve the problem of low efficiency of the existing detection method

Method used

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  • Measurement loop wiring error determination method and device
  • Measurement loop wiring error determination method and device
  • Measurement loop wiring error determination method and device

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Embodiment Construction

[0062] see figure 1, a flow chart of a method for judging a metering circuit wiring error.

[0063] This embodiment provides a method for judging a metering circuit wiring error, the method comprising:

[0064] S100, transmitting a voltage / current test signal according to a preset period;

[0065] The primary side of the three-phase voltage / current transformer is the high-voltage side, and the secondary side is the low-voltage side. The voltage / current signal source is connected to the secondary side outgoing terminal of each phase of the three-phase current transformer, and the voltage / current signal is emitted. The amplitude of the voltage signal is less than 10V, and the amplitude of the current signal is less than 0.5A, so as to avoid any damage to secondary equipment such as voltmeter, ammeter, power meter, and relay protection equipment.

[0066] The voltage / current test signal adopts a sine wave, which is the only waveform with a single frequency component, and even i...

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Abstract

The present invention discloses a measurement loop wiring error determination method and device. The method mainly comprises: emitting voltage / current test signals according a preset period; obtaining the number of cyclic waves of the test signals and the corresponding cyclic wave initial phases of the test signals; receiving feedback signals; obtaining the number of cyclic waves of the feedback signals; screening determination signals located at the same phase lines as the test signals according to the number of cyclic waves of the test signals and the number of cyclic waves of the feedback signals; determining the wiring correctness according to the corresponding cyclic wave initial phases of the test signals and the corresponding cyclic wave initial phases of the determination signals; and outputting a detection result. The measurement loop wiring error determination method and device can effectively solve the problem that a current detection method is low in efficiency.

Description

technical field [0001] The present application relates to the technical field of electrical measurement, and in particular to a method and device for judging wiring errors of metering circuits. Background technique [0002] The electric energy metering device includes metering voltage and current transformers and their secondary circuits, electric energy metering cabinets, etc., which are used to measure and calculate the amount of electric energy between the three departments of power generation, supply, and consumption. The electric energy metering device is correct. It is a necessary condition to ensure accurate measurement during wiring, and the wiring inspection must be carried out before the operation of the electric energy metering device. [0003] Before the newly installed electric energy metering device is put into use, since it cannot be directly operated with electricity, it cannot rely on field equipment to judge the correctness of the wiring of the newly instal...

Claims

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Application Information

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IPC IPC(8): G01R35/04
Inventor 何兆磊朱伟杰张余梅赵益逵崔荧蓥杨寅谭飞
Owner QUJING POWER SUPPLY BUREAU YUNNAN POWER GRID CO LTD
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