摘要
针对500kV玉溪变8月9日220kV玉竹Ⅰ回线2563断路器的拒动,根据RCS-921A(V2.00)超高压线路成套保护装置当时报告记录显示在B、C相合上,A相拒动,三相不一致保护未动作是由于断路器没有正确的位置开入变位造成的。通过断路器三相不一致保护的原理分析后,正确反映断路器的位置状态是断路器三相不一致保护的重要判据,指出了断路器位置未能正确开入的原因。针对其缺陷,并提出两种改进方案。
For the resist-operation of 2563 circuit breaker of Yuzhu 220kV line Ⅰ of 500kV Yuxi substation occuring on August 9th, RCS-921A （V2.00）, the protection device of EHV lines shows closing in both phase B and C, while no closing in phase A,and three-phase inconsistent protection no action .After a detailed analysis, judgement could be made that the protection failed is due to the lack of the correct input position of the change of the circuit breaker, while the accurate location of circuit breaker is an important criterion of three-phase inconsistent protection. Furthermore, this paper proposes the causes that the position of circuit breaker failed to input correctly, and puts forword two improving programmes according to deficiencies mentioned above.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2008年第20期91-92,96,共3页
Power System Protection and Control
关键词
断路器拒动
三相不一致保护
故障分析
breaker resist-operation： three-phase inconsistent protection
fault analysis
