摘要
为了提高断路器三相不一致保护的动作可靠性,从断路器本体三相不一致保护和微机三相不一致保护的原理构成、存在的问题等入手,分析了导致三相不一致保护不正确动作的因素,并结合以上两种三相不一致保护的优点,提出一种新型三相不一致保护控制回路,该保护控制回路增加了继电器和触点的数目并改变了原有的拓扑结构。对比传统三相不一致控制回路中存在的器件易老化、时间继电器可靠性差等不足,该回路具有对器件依赖性低、防老化性能更好、可靠性更高的特点。
In order to improve the operational reliability of three-phase inconsistent protection of circuit breaker,starting with the principle and problems of three-phase inconsistent protection of circuit breaker,this paper analyzed the factors leading to incorrect operation of threephase inconsistent protection.Combining with the above two kinds of three-phase inconsistent protection advantages,this paper proposed a kind of new type three-phase inconsistent protection control loop,which increased the number of relays and contactors and changed the original topological structure.Compared with the insufficiencies of easily aged devices,low reliable relays in the traditional three-phase inconsistent control loop,this control loop has the characteristics of low dependency of devices,better anti-aged performance and high reliability.
作者
李清泉
胡云龙
常高颂
冯知海
LI Qing-quan;HU Yun-long;CHANG Gao-song;FENG Zhi-hai(State Grid Shandong Power Supply Maintenance Company,Jinan 250018,China)
出处
《电工电气》
2019年第9期36-38,49,共4页
Electrotechnics Electric
关键词
断路器
三相不一致
本体保护
微机保护
circuit breaker
three-phase inconsistency
ontological protection
microcomputer protection
