Method and device for testing resistive current of line arrester

Abstract

This application discloses a method and device for testing the resistive current of a line arrester, which continuously obtains the real-time voltage waveform on the secondary side of the voltage transformer on the line where the line arrester is located and the real-time waveform of the full current at the line arrester. The real-time voltage waveform is determined by the Beidou satellite. The standard time of the sampling point and the real-time waveform of the full current are determined by the Beidou satellite; the resistive current is calculated according to the real-time waveform of the full current and the real-time voltage waveform of the same period. The technical solution of this application can use the precise timing function of the Beidou satellite to synchronize voltage and current waveforms and phase signals, obtain the position information of the line arrester through the positioning function of the Beidou satellite, and obtain the line length from the substation to the line arrester according to the path of the transmission line. Correct the phase difference caused by distributed inductance at the measurement point, so that the resistive current component can be obtained effectively according to the phase difference between voltage and current.

Description

technical field [0001] The present application relates to the field of electric power technology, in particular to a method and device for testing the resistive current of a line arrester. Background technique [0002] The line arrester is an important device on the transmission line. It is mainly responsible for limiting the overvoltage of the line, preventing overvoltage from invading and damaging other power equipment, and enabling the safe operation of power lines and power plant equipment. The line arrester is exposed to the wind and the sun, and the environment of chemical erosion, weathering, and sun rays may cause the arrester to age, damage and be affected by moisture. When the line arrester is damp, the leakage current increases, causing the arrester to heat up or even explode. Therefore, it is very necessary to detect whether the line arrester is damp and whether it is insulated. [0003] The detection tests of line arresters mainly include power failure test and...

AI Technical Summary

Problems solved by technology

[0005] This application provides a method and device for testing the resistive current of a line arrester to solve the problem that the existing method for measuring the resistive current of a line arrester cannot effectively measure the resistive current

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