摘要
阐述了充电至母联死区故障的概念和相应保护的重要性,分析了各种运行方式下母联死区故障的特征,认为快速准确地判断出母联开关合闸充电时刻是实现保护的关键。提出了基于母联跳位接点(TWJ)、母联手合接点(SHJ)及母联充电压板的3种解决方案并对其优缺点进行分析;介绍了实现母联SHJ方案的保护逻辑,通过对母联电流、母联TWJ及SHJ运行状态进行实时监测及逻辑分析,保护可准确地跟踪充电操作的全过程,在发生充电至母联死区故障时可迅速地作出反应。通过动模实验证明该保护灵敏可靠,能满足现场工程应用的要求。
The conception of BED（Bus-coupler Energizing Dead-zone） fault and the importance of its corresponding protection are introduced.The characteristics of BED fault under different operating modes are analyzed and it is concluded that the energizing time after the closing of bus-coupler switch is the key to realize the protection.Three solutions of BED protection are proposed and compared ：TWJ（bus-coupler trip contactor）,SHJ（bus-coupler manual close contactor） and BEJ（bus-coupler energizing jumper）.The protection logic of SHJ is presented.By the real-time monitoring of the current and state of TWJ and SHJ,as well as the logic analysis,the protection tracks whole energizing process exactly and reacts to BED fault rapidly.Dynamic emulation and site application prove the sensitivity and reliability of the proposed protection schemes.
出处
《电力自动化设备》
EI
CSCD
北大核心
2013年第6期168-172,共5页
Electric Power Automation Equipment
关键词
母线保护
差动保护
充电至母联死区故障
继电保护
监视
busbar protection
differential protection
bus-coupler energizing dead-zone fault
relay protection
monitoring
