10kV系统发生单相接地与谐振故障分析

Analysis of single-phase grounding and resonance failure in 10kV system

本文引用110kV某变电站出现的10kV系统的两个案例,分析不同故障影响下10kV母线电压表象,便于变电运行人员对不同故障类型进行辨识,找到处理办法,提高快速响应能力。本文通过电压互感器单相接地和谐振的主要原因,说明了单相接地与谐振故障现象的根本区别。

In this paper, two cases of the 10kV system in a substation of 110KV are cited, and the voltage of the 10 kV bus is analyzed under the influence of different faults, so that the transformer operator can identify the different fault types, find the treatment method and improve the quick response capability. In this paper, the fundamental difference of single-phase grounding and resonance fault is illustrated by the main reason of single-phase grounding and resonance of voltage transformer.