微型机母线保护防死区故障的改进方案

Improvement Plan in Preventing the Dead-Zone Fault for Microprocessor Bus Protection

目前微机型母线保护在解决母联断路器和母联电流互感器之间的保护动作死区时,存在有待改进的问题。在详细分析比较现有的两种主流保护特征以及动作情况的基础上,提出了相应的改进方案。特别针对双母线并列运行时发生死区故障跳闸非故障母线的问题,提出了新的改进方法。

At present, the microprocessor bus protection is still improvable in preventing the dead-zone fault between the bus coupler circuit-breaker and the bus couple current transformer. By analyzing and comparing the two main- stream protection eharacteristics and operating conditions, this paper proposes the corresponding improvement plan, especially for solving the problem of the none-faulty bus disconnect when the double-bus runs together in bus differen- tial protection.