APPARATUS AND METHOD FOR DETECTING RESISTIVE LEAKAGE CURRENT OF SURGE ARRESTER FOR COMPUTATIONAL LOAD REDUCTION

摘要

In the present invention, in order to extract the resistive leakage current component from the Fourier series of the lightning arrester leakage current, it is not necessary to repeat the Fourier transform process in the process of searching to match the section to be Fourier transform with the section in phase with the AC voltage, so the amount of computation is greatly increased By reducing and initially searching the section of the leakage current of one cycle to be Fourier transform once based on the characteristic pattern repeatedly expressed by the application of AC voltage, the section search process of the leakage current of one cycle is also shortened, so that the resistive leakage current in real time It relates to an arrester resistive leakage current detection device and detection method for reducing the amount of computation that enables detection, and relates to a leakage current detection unit (10) that detects a leakage current of an arrester (1), and a time point of the highest left-right symmetry in the leakage current as a reference point The characteristic pattern of the lightning arrester resistance leakage current from the reference point search unit 20 selected as It is implemented by the resistive leakage current extraction unit 40 that corrects the reference point to be expressed in the sum.