摘要
分析了2006年9月26日海南南山电厂1号发电机定子接地保护越级动作的原因是保护装置零序电流最小整定值过大,不能满足在较小运行模式厂用电系统下的动作要求。提出了相应的改进办法,提高了电厂运行的可靠性。
The overstep tripping of grounding protection of No.1 generator stator in Nanshan Power Plant occurred on Sept. 26th. 2006. The reason was analyzed, which was overlarge value for minimum setting of zero sequence eta-rent and can not satisfy the operation requirement of service power system in minimum operation mode. The corresponding improvement method was put forward, which raised the operation reliability of power plant.
出处
《电力设备》
2007年第8期68-70,共3页
Electrical Equipment
关键词
中性点不接地系统
零序电流保护
单相接地
ungrounded neutral system
zero sequence current protection
single - phase grounding
