控制回路设计缺陷造成断路器拒动分析及改进方案研究  

Analysis of Opening Refusal of Circuit Breaker Caused by ControlCircuit Design Defects and Study on Improvement Scheme

作　　者：俞伊丽 张展耀 接晓霞 戴涛 周晨 YU Yili;ZHANG Zhanyao;JIE Xiaoxia;DAI Tao;ZHOU Chen(Zhoushan Power Supply Company of State Grid Zhejiang Electric Power Co.,Ltd.,Zhoushan 316000,China)

机构地区：[1]国网浙江省电力有限公司舟山供电公司,浙江舟山316000

出　　处：《山东电力高等专科学校学报》2023年第5期11-17,共7页Journal of Shandong Electric Power College

摘　　要：分析了一起110 kV断路器拒动导致其他保护越级动作的事故,根据事故原因,对保护操作箱跳合闸回路与断路器机构箱远方/就地切换把手的配合关系进行研究并改进。在改进方案中将保护跳合闸回路与测控跳合闸回路分开并单独引至断路器机构箱,同时新增远方/就地切换把手HK2和控制屏操作把手,以防止运维人员手合于故障时,保护装置动作但断路器拒动。An incident of the overstepping action of other relay protection devices caused by the opening refusal of a 110 kV cir⁃cuit breaker is analyzed.Based on the cause of the incident,the coordination relationship between the tripping and closing circuit in the protection operation box and the remote/local switching handle in the circuit breaker mechanism box is studied and im⁃proved.In the improvement scheme,it is proposed to separate the protective tripping and closing circuit from the measurement and control tripping and closing circuit,and connect them separately to the circuit breaker mechanism box.Additionally,an opera⁃tion handle on the control panel and a remote/local switching handle HK2 are added,so as to prevent the occurrence of the inci⁃dent that the relay protection acts but the circuit breaker refuses to act when the operation and maintenance personnel manually close the circuit breaker and connect to the fault.

关 键 词：控制回路 保护操作箱 断路器机构箱 断路器拒动 

分 类 号：TM772[电气工程—电力系统及自动化]