Rapid detection method for false wiring of high-voltage three-phase three-wire electric energy metering device

Abstract

The invention discloses a rapid detection method for false wiring of a high-voltage three-phase three-wire electric energy metering device. The method comprises that a voltage value of a first component voltage, a voltage value of a second component voltage, a voltage difference value between the first and second component voltages, a phase difference between the first component voltage and a first component current, a phase difference between the second component voltage and the first component current and a phase difference between the second component voltage and a second component current are measured; when disconnection or polarity reversal connection does not exist in a voltage transformer, the voltage input phase sequence is determined; a vector diagram is determined; a special angle suitable for the phase difference between the first component voltage and the first component current and another special angle suitable for the phase difference between the second component voltage and the second component current are determined; the phase-following relation of the voltage and current is determined; the vector diagram is improved; and a false wiring power expression and a correction coefficient are determined. The detection method can detect false wiring of the high-voltage three-phase three-wire electric energy metering device rapidly and accurately.

Description

technical field [0001] The invention relates to the technical field of electric energy metering, in particular to a fast detection method for incorrect wiring of a high-voltage three-phase three-wire electric energy metering device. Background technique [0002] As an important part of metering work, electric energy metering is an important link in the production and operation management of electric power enterprises and the safe operation of the power grid. Fairness, justice, accuracy and reliability are related to the interests of power companies, power customers and ordinary people. The measurement accuracy of the electric energy meter can be guaranteed by the verification of the electric energy measurement and verification organization, and the accuracy of the on-site wiring depends not only on the work responsibility, professional level and work proficiency of the meter installer, but also due to the laws and regulations of electric power customers. Apathy and intentio...

AI Technical Summary

Problems solved by technology

[0005] What the present invention aims to solve is the problem of high error probability and long analysis period in the process of detecting the wrong wiring of the high-voltage three-phase three-wire electric energy metering device when the phase-to-phase relationship cannot be directly measured.

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