摘要
针对伊敏发电厂伊敏换流站5043断路器故障失灵动作保护,通过仿真计算,并结合录波图,分析5043断路器开断失败的原因主要是流过断路器的直流分量过大,出现了短路电流长时间不过零点。对影响直流分量大小的因素做了分析研究,得出故障时电压初相角对直流分量的影响较大,发电机参数对直流分量的影响程度较小,分析不同故障点流过断路器的直流分量的大小,找出了直流分量最大的故障点,为断路器重合闸整定时间提供参考依据。
Concerning 5043 switch of Yimin Power Plant Yimin converter station failed action protection, through simulation and oscil- lography, excessive flowing through the circuit breaker DC is the reason, which caused the current-zero offset. Factors affecting the size of the DC component are analysed, it comes to the conclusion that the voltage initial phase angle has a large influence on the DC component and the generator parameters has a small influence on the DC component. This paper analyses the size of the DC components that flowing through the switch on different failure points, and identifying the point where the DC component is biggest and providing a reference for the switch reclosing time tuning.
出处
《东北电力技术》
2013年第5期14-17,共4页
Northeast Electric Power Technology
关键词
重合闸
直流分量
零点漂移
断路器
Reclosing
DC component
Current-zero offset
Circuit breaker
