CSL-200B系列微机线路保护装置操作回路的改进

CSL-200B系列微机线路保护的遥控合闸与保护合闸共用合闸回路,不能满足电力现场操作规程要求遥控合闸时退出重合闸保护。提出了从保护装置内部把遥控合闸回路与保护合闸回路分开和改变保护装置外部二次回路使遥控合闸时开入重合闸闭锁量闭锁重合闸两种改造方案,并从保护的基本原理、二次回路、操作灵活性、安全性、可靠性和方案的可操作性等方面作出比较,选择了最优的外部改造方案并实施了改造。实际检验结果表明了改造方案的有效性。

Alteration to the operation circuit of series CSL-200B microprocessor-based transmission line protection device

CSL-200B series microprocessor-based transmission line protections apply a common closing circuit for both remote control and protection,the requirement of the electrical field operation regulation is thus unsatisfied,i.e.the reclose protection should be disabled during remote control close.Two improvement schemes are provided including separate remote control and protection close circuits internally and a binary input signal from external secondary circuit blocks recluse protection during remote control close.Two schemes are compared from protection principle,secondary circuits,reliability and availablity,and the external improvement scheme is chosen and implemented.The field test shows its effectiveness.