一起近距离区外故障保护误动分析及改进

Maloperation analysis of near distance protection and improvement

本文介绍了四方公司CSL100系列保护装置在线路一侧为中性点接地方式、另一侧中性点不接地的特定情况下,区外发生单相接地故障时会造成保护误动。并针对这起保护误动事故,从软件逻辑上分析了其误动原因,制定了相应整改方案。

Outside the short distance area the fail safe by mistake moves together analyzes and improves,CSL series protection in line one side for neutral point earth way、Does not earth in another one side neutral point in situation。Outside the area has when the single-phase earth fault can create the protection to move by mistake,This article movesby mistake in view of this protection,Analyzes it to move the reason by mistake,and formulates reorganizes the plan.