基于RTDS小电流接地系统主要故障条件的暂态SFB分量分析

Analyses of Transient SFB Components under Main Fault Conditions inNeutral Un-effectual Grounded System Based on RTDS

为多方面检验暂态法小电流接地选线装置性能的效果及对检验结果进行理论分析做准备,介绍了基于暂态SFB分量的选线方法,利用实时数字仿真器(RTDS)建立小电流接地系统仿真平台,设置故障时刻、故障过渡电阻、谐波含量、故障位置、故障稳定程度5种类型条件的故障进行仿真试验,分析各类型条件变化对暂态SFB分量的影响。仿真结果得出各种故障条件下选线方法的适用性,证明建立的仿真平台适于该类装置的检验。

In order to prepare the performance test Of the neutral un-effectual grounded line selecting device based on transient method and the theoretical analysis of test results, the line selecting method based on transient SFB signal are introduced. The simulating platform of the neutral un-effectual grounded system based on RTDS is developed which can set five fault conditions including fault time, transient resistance, harmonic content, fault location, and fault stability level. The influences of different fault conditions to the transient components in SFB are analyzed. Test results show the suitability of the line selecting method and prove that the platform is suitable for the test of such kind of device.