220kV断路器防跳回路研究综述及案例分析

Research Review and Case Analysis of Anti-tripping Circuit of 220 kV Circuit Breaker

阐述防跳回路的定义和种类,说明操作箱防跳和断路器机构防跳的原理,分析采用机构本体防跳存在的问题,提出改进措施。以某地区220kV变电站发生事故时防跳失效为例,说明本体防跳回路中接点竞争情况,最后结合现场实际提出了断路器防跳回路的试验方法。

The definition and types of anti-tripping circuit are described in detail in this paper,and the principle of anti-tripping of the operation box and circuit breaker mechanism is explained.The problems existing in adopting the breaker mechanism for anti-tripping are analyzed,and improvement measures are put forwarded.With the anti-tripping failure in a 220 kV transformer substation in an area as an example,the contact competition in the anti-tripping circuit of the breaker is analyzed.Finally,the experiment methods of anti-tripping circuit of the circuit breaker are put forward based on the actual field conditions.