中性点不接地系统单相接地故障的判断

Judgement on Single-phase Earth Fault of Non-earth System for Neutral Point

对中性点不接地系统单相故障的判别─—零序电流法做了详细介绍，给出了一种简单计算故障零序电流的实用模型，并结合我国电力系统的实际情况对该保护的灵敏度及应用中动作参数的整定做了较完善的论述．

The zero-sequence current method distinguishing single phase earth fault of non-earth system for the neutral point is introduced. A simple practical model for calculating fault zero-sequence current is given. Considering the reality of our electrical power system, the sensitivity of this protection and definition of action parameter in its application are expounded.