小电流接地系统故障选线法的分析

Analysis of Method to Select Fault Line in Small Current Grounding System

介绍了小电流接地系统发生单相故障时的故障特性,分析了主动式选线、被动式选线以及综合选线的原理、应用条件及优缺点,并对其发展现状进行了归纳总结,指出利用神经网络、小波变换等信号处理技术的综合选线法在理论和仿真阶段获得了很大进展,但还需要在如何提高装置的容错性和抗干扰能力等方面寻求突破。

Introduction was made to the fault features of small current grounding system when the single-phase fault happened. This pa-per analyzed the principle of active, passive and comprehensive line selections, the application condition and their relative merits, and the development status was summarized. It is pointed out that the synthesized line selection of the neural network and the wavelet transform etc signal processing technology in theory has made great progress, as well as in the emulation stage, but a breakthrough should be sought in the respects of how to improve the fault tolerance and anti-disturbance ability of the device.