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笔者主要分析GIS典型绝缘缺陷引起的局部放电(PD)过程,并应用FDTD算法,分别以理想的高斯脉冲信号和真实PD电流信号为激励源,研究电磁波在GIS内部的传播特性,结果表明:PD实际电流信号与理想高斯脉冲激励下的电磁波相差较大,PD超高频电磁波传播特性仿真研究宜采用实测PD信号作为模拟激励源。
The author mainly analyzes the partial discharge (PD) caused by typical insulation defects in GIS and applies the FDTD algorithm to study the propagation characteristics of electromagnetic wave in GIS with ideal Gaussian pulse signal and real PD current signal as excitation sources respectively. The results show that PD The actual current signal is quite different from the electromagnetic wave under the ideal Gaussian pulse excitation. The simulation study of PD UHF electromagnetic wave propagation characteristics should adopt the measured PD signal as the simulation excitation source.