母线保护对死区故障的优化解决方案  

Optimized solution scheme of bus protection for dead zone fault

作　　者：王风光[1] 李力[1] 吕航[1] 丁杰[1] 代家强 龚啸 WANG Fengguang;LI Li;LÜHang;DING Jie;DAI Jiaqiang;GONG Xiao(NR Electric Co.,Ltd.,Nanjing 211102,China)

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211102

出　　处：《电力自动化设备》2021年第12期219-224,共6页Electric Power Automation Equipment

基　　金：国家重点研发计划项目(2016YFB0900600)。

摘　　要：母线保护为母联死区故障设置了母联死区保护功能,没有为支路死区故障设置支路死区保护功能。介绍了现有的母联死区保护功能,提出了母线保护装置同时接入母联开关两侧的电流互感器,设置母联死区差动保护功能的改进方案,解决了母联合位死区保护没有选择性、故障切除范围大的问题。介绍了母线差动保护与线路保护在支路死区故障发生时的动作行为,指出了母线保护设置支路死区保护功能的必要性,分析了支路死区保护功能的动作行为。针对支路死区保护功能存在的误动风险提出了相应的解决方案,避免了不必要的开关跳闸,提高了母线保护动作行为的选择性。Bus protection configures bus coupler dead zone protection for bus coupler dead zone fault,but not configures feeder dead zone protection for feeder dead zone fault.The existing bus coupler dead zone protection is introduced,and an optimized solution scheme is proposed,in which the current transformers on both sides of bus coupler are connected with bus protection simultaneously,and the bus coupler dead zone differential protection is set.The problem that bus coupler dead zone protection does not have selectivity and its fault cut range is large,is solved by the propose scheme.The operating behavior of the bus differential protection and line protection when feeder dead zone fault occurs is introduced,the necessity of configuring feeder dead zone protection for bus protection is pointed out,and the operating behavior of the feeder dead zone protection is analyzed.Then the corresponding solution for maloperation risk of the feeder dead zone protection is proposed,which avoids unnecessary circuit breaker tripping and improves the selectivity of the bus protection.

关 键 词：母联死区保护 支路死区保护 母线差动保护 母线保护 继电保护 

分 类 号：TM77[电气工程—电力系统及自动化]