一种断路器对地及断口绝缘故障快速监测方法  

Rapid monitoring method for breaker’s grounding and break faults

作　　者：刘志学[1,2] 

机构地区：[1]江苏省电力公司检修分公司苏州检修分部,江苏苏州215000 [2]苏州供电公司,江苏苏州215000

出　　处：《电力自动化设备》2013年第5期168-172,共5页Electric Power Automation Equipment

摘　　要：提出了一种断路器对地及断口绝缘故障快速监测方法,并通过该方法设计了一套监测系统。该监测系统由对地绝缘故障瞬时判别电路和断口绝缘故障延时判别电路组成,当断路器发生对地绝缘故障/断口绝缘故障时该系统能瞬时/快速响应,且该系统在断路器正常运行时不存在误判的可能。提出的监测系统可与断路器失灵保护跳闸回路配合使用,在发生断路器对地或断口绝缘故障时立即作用于相邻断路器跳闸,避免失灵保护长延时切除该故障对电网、设备和人身安全带来的危害。A method of rapid monitoring is proposed for the grounding fault and break fault of breaker, based on which,a monitoring system is designed. It consists of the instantaneous discrimination circuit for the instantaneous response to grounding fault and the delayed discrimination circuit for the fast response to break fault,without any possibility of misjudgment during the normal operation of breaker. It can also be used in conjunction with the trip circuit of failure protection to instantly trip the adjacent breaker during the grounding fault or break fault ,which avoids the possible harm caused by the long delayed trip of failure protection to grid,equipment and personnel.

关 键 词：断路器 对地绝缘故障 断口绝缘故障 监测 失灵保护 暂态稳定 

分 类 号：TM561[电气工程—电器]