ANALYSIS ON PARTIAL DISCHARGE IN GIS BY FDTD METHOD
LI Hai-liang · Proceedings of the CSEE · 2005
By UHF method of measuring GIS partial discharge, the big problem is to mark apparent discharge quantity. Moreover, it is hard to distinguish what the principal influence upon magnitude of UHF signals is. To solve them, wave-guide cavity configuration is utilized and FDTD method is used to simulate transmission of PD (partial discharge) electromagnetic wave in wave-guide. Therefore, factors influencing UHF signals are analyzed, which includes position, dimension, PD current amplitude and pulse shape of PD source. According to UHF output signals, original PD pulse can be estimated, which contributes to marking GIS partial discharge.