220kV母线保护改造技术原则探讨

Discussion on Reformation Fechnique Principle of 220kV Bus Protection

鉴于四川电网220 kV电网日益增长的重要性以及部分220 kV变电站220 kV母线保护及断路器失灵保护装置超期运行的严峻性,迫切需要对部分220 kV变电站220 kV母线保护进行改造。在分析四川某220 kV变电站双母接线方式下220 kV母线保护改造方案的基础上,对改造中的直流回路、交流回路、跳闸回路及间隔失灵启动等回路改造技术原则进行了总结分析,以期对四川电网及其他省网220 kV变电站220 kV母线保护改造提供一定的参考与指导。

In view of the growing importance of Sichuan 220kV power grid and the seriousness of the extended operation for some of 220kV bus protection devices in 220 kV substations,it is urgent need to rebuild some 220kV bus protection.Based on a real 220kV substation bus protection reformation project,the reformation technical principles for 220 kV bus protection,such as DC loop,AC loop,tripping and start malfunctioning loops in the reformation,are analyzed and summarized,which is expected to provide a reference and guidance for the further bus protection reformation projects in Sichuan power grid or the power gird in other provinces.