220kV变电站中刀闸接触缺陷对断路器保护的影响

Influence of contact defects of knife gate in 220kV substation on the protection of circuit breaker

以一例220kV变电站中出现的刀闸接触缺陷为背景,分析这种缺陷与断路器保护之间存在的关系。文章发现在刀闸接触存在缺陷期间,失灵保护功能与死区保护功能均无法在断路器中得以正常运行,正确动作失真,如无妥善解决,则可能引发事故的进一步扩大。为解决刀闸接触缺陷问题,本文提出具体解决措施,以杜绝此类问题再次出现。

The relationship between the protection of circuit breaker and the contact defect of the knife gate in a 220 kV substation is analyzed.The article found during the switch contact defects,failure protection function and protection function are not dead in the circuit breaker to the normal operation of the correct action of distortion,if there is no proper solution,to further expand is likely to cause the accident.In order to solve the problem of contact defect of knife gate,this paper puts forward specific measures to prevent such problems from appearing again.