一起断路器合闸不到位故障处置流程及原因分析
李清泉,李相栋,冯知海
(国网山东省电力公司超高压公司,山东 济南 250018)
摘 要:介绍了一起 500 kV 弹簧操动机构断路器合闸不到位故障,并给出了事故紧急处理方案,来避免故障断路器发展为燃弧、爆炸事故。通过现场设备检查,对事故原因进行了分析,最终确定事故的直接原因为脱出的销轴与机架腰形孔产生碰撞卡死,导致合闸不到位;根本原因为固定销轴的螺钉未装配或因松动而脱落。提出了相应的排查和应对措施,以避免类似故障再次发生。
关键词: 断路器;操动机构;销轴;合闸不到位
中图分类号:TM561 文献标识码:B 文章编号:1007-3175(2023)06-0044-05
Analysis of Disposal Process and Causes of a
Circuit Breaker Inadequate Closing Fault
LI Qing-quan, LI Xiang-dong, FENG Zhi-hai
(State Grid Shandong Electric Extrahigh Voltage Company, Jinan 250118, China)
Abstract: An inadequate closing fault of the circuit breaker occurring to 500 kV spring operating mechanism is introduced, and the corresponding emergency treatment scheme is proposed to avoid this circuit breaker fault becoming an arc burning or explosion accident. After checking equipments on site, the paper analyzes causes of this fault. The collision between the detached pin shaft and the waist-shaped hole of the frame led to inadequate closing of the circuit breaker, which is the direct cause. While the root cause is that screws holding the pin shaft are not assembled or loose. Therefore, the paper proposes corresponding checking measures and solutions to avoid the recurrence of such faults.
Key words: circuit breaker; operating mechanism; pin shaft; inadequate closing
参考文献
[1] 国家电网公司运维检修部. 高压开关设备典型故障案例汇编(2006~2010 年) [M] . 北京:中国电力出版社,2012.
[2] 苗全堂,于永进,路铭,等. GIS 弹簧机构断路器合闸不到位引发燃弧故障分析[J] . 电工电气,2020(7):69-71.
[3] 陈宇民,赵现平,彭晶,等. 一起销轴缺陷引起断路器合闸不到位故障分析[J] . 高压电器,2019,55(6):247-252.
[4] 马宏明,周涛涛,彭诗怡,等. 一起 220 kV SF6 断路器合闸不到位故障及分析[J] . 高压电器,2018,54(7):224-230.
[5] 韩燕,关成海,闫斌斌,等. 一起分闸掣子缺陷引起的断路器合后即分质量事件分析[J] . 高压电器,2022,58(2):193-198.
[6] 黎卫国,张长虹,杨旭,等. 一种弹簧操作机构合后即分故障分析[J] . 高压电器,2021,57(6):246-252.
[7] 孙董军,郑易谷,陈曦,等. 一起 110 kV 断路器合后即分故障及分析[J] . 云南电力技术,2019,47(2):29-31.
[8] 李璐,牛田野,姜国庆,等. 一起 500 kV SF6 断路器爆炸事故的分析[J] . 中国电机工程学报,2016,36(S1):246-250.
[9] 范敏,陈功,蓝磊,等.SF6 断路器弧触头电烧蚀试验及状态诊断[J]. 高压电器,2016,52(6):141-146.
[10] 陈朝廷. ABB 开关 BLG1002A 型机构分合闸弹簧调节工具及箱体[J]. 电力系统装备,2021(22):98-99.