摘要
核电站普遍在发电机和主变压器之间装设专用的发电机出口断路器(GCB),在发电机保护中配置GCB失灵保护。本文通过分析常规发电机GCB失灵保护在小故障电流时无法启动的原因,介绍了两种在百万级核电机应用的方案,对失灵保护的电流元件提出了按有流原则整定及保护动作接点采用大功率重动继电器双开入的建议。
In nuclear power plants,special GCB is installed between the generator and the main transformer,and GCB failure protection is configured in the generator protection.This paper analyzes the reason why the GCB failure protection of conventional generator cannot be started under small fault current,introduces two schemes of application in million nuclear motor,and puts forward the suggestion that the current element of failure protection should be set according to the principle of current and the protection action contact should be double-opened by high-power reworking relay.
作者
杨亮
郭佩喆
孟若熙
Yang Liang;Guo Peizhe;Meng Ruoxi(JiangSu Nuclear power Co.,Ltd.,Lianyugangcity 222042,China)
出处
《智能建筑电气技术》
2023年第4期64-66,共3页
Electrical Technology of Intelligent Buildings
关键词
发电机出口断路器
失灵保护
相电流
负序电流
generator ciruit breaker(GCB)
circuit breaker failure protection
phase current
negative sequencecurrent
