摘要
在中性点不接地系统中发生接地故障时,如何快速准确地选出并隔离故障线路,对电网的安全运行非常重要。通过对中性点不接地配电网单相接地故障时零序全电流的分析,得出利用零序全电流的大小和方向故障选线的新方法,该方法与利用零序基波电流的大小和方向故障选线比较,选线信号容易获得,且是接地电流的全部信息。这对故障线路的识别、提高选线的准确率及微机选线装置的开发是有利的。
When the phase to earth fault occurs in neutral indirect grounding power system,it is important to select and isolate the faulted circuit quickly,which is not solved very well so far.By analyzing the zero sequence full current when single-phase earth fault in neutral indirect grounding distribution network occurs,new method of line-selection using amount and direction of zero sequence full current is obtained.Comparing with the line-selection using amount and direction of zero sequence fundamental wave current ,it is easy to obtain the line-selection signal,and it is all information of full current.It is good for improving accuracy of line-selection and development of line-selection devices based on microcomputer.
出处
《中国电力》
CSCD
北大核心
2003年第3期31-32,共2页
Electric Power
基金
辽宁省教育厅高等学校科学研究项目(10221062)
