母线保护改造中失灵回路存在的问题及改进措施

Problems and improvements of protection failure circuit in busbar protection

母线保护换型改造中的失灵回路改造比较复杂,容易产生问题,该文通过某电厂在一次母差保护改造过程中失灵误动作造成的全厂停电事故,分析了母差保护改造中的失灵回路存在的问题,对母差保护改造提出一些建议和改进措施,以防止在母差保护改造过程中再发生类似的问题。

It could easily cause problems in the reconstruction process of failure protection circuit.By using a blackout accident caused by malfunction as an example,this paper analyses this existing problem of protection failure circuit,and proposes advices and improvements on the reconstruction of busbar protection to prevent the similar accidents from it.