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Analysis of a Blackout Escalation Caused by Hidden Failure Lying in Blocking Logic Between Auto-switching Protection and Bus Differential Protection
Author(s): 
Pages: 102-107
Year: Issue:  7
Journal: Automation of Electric Power Systems

Abstract: 介绍了2009年华东电网一起事故的发生及演化过程,并根据事故发展的3个阶段,分别对相关的设备状况及保护信息进行了分析.分析表明,该事故属于比较少见的复杂故障,但该站的35 kV母联自切保护不合理地闭锁母差导致了事故的扩大.文中根据母联自切及母差保护原理,论述了母联自切与母差保护之间的相互闭锁关系,指出该设计存在隐性缺陷.最后总结了教训,提出了预防类似事故的建议.
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