摘要
继电保护中电流回路两点接地是造成保护不正确动作的隐患。通过对一起继电保护误动事件,采取波形分析、相量分析、定量计算、回路试验的分析方法,证实TA两点接地是造成保护装置不正确动作的原因,并结合现场实际提出相应的解决措施。
Two-point grounding of the current loop in relay protection causes incorrect actions.We confirm that TA two-point grounding is the cause of the incorrect action of protection device.The conclusion is reached by adopting the method of wave form analysis,vector analysis,quantitative calculation and circuit test.for a relay protection misoperation accident Also, corresponding measures combined with the actual situation are put forward.
出处
《山东电力技术》
2015年第5期74-77,共4页
Shandong Electric Power
关键词
TA两点接地
波形分析
地电位差
误动
TA two-point grounding
waveform analysis
earth potential difference
misoperation
