一起化工厂10kV开关柜过电压保护器热崩溃事故分析

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (4354 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Taking the accident of circuit breaker tripping and switchgear cable room explosion caused by thermal runaway of the overvoltage protector in 10kV switchgear of a 110kV substation in a chemical plant as an example, starting from the structure and working principle of the overvoltage protector, the causes of this accident are investigated and analyzed according to the accident phenomenon. The comprehensive analysis show that the cause of this accident is the ferromagnetic resonance overvoltage caused by the reverse complex intermittent arc grounding of 10kV system B, which causes the thermal runaway of the zinc oxide resistance sheet in the overvoltage protector. This then causes the AC phase short circuit fault in the switchgear and the explosion of the cable room, indicating that the root cause of the accident is caused by the defect of the three-phase four-star wiring structure of the overvoltage protector. Finally, in order to prevent similar accidents from happening again, elimination and preventive measures are proposed, which provides reference for ensuring the safe and stable operation of the power system.

Key words： switchgear overvoltage protector intermittent arc grounding ferromagnetic resonance thermal runaway

Received: 12 October 2023

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZUO Tao

Cite this article:

ZUO Tao. Accident analysis on thermal runaway of overvoltage protector in a chemical plant 10kV switchgear[J]. Electrical Engineering, 2024, 25(2): 68-73.

URL:

http://dqjs.cesmedia.cn/EN/Y2024/V25/I2/68

[1] 黄鹏. 一起由过电压保护器爆炸引起汽轮机跳机的事故分析[J]. 广西职业技术学院学报, 2017, 10(3): 24-27.
[2] 吕建彬. 自脱离过电压保护器的应用探讨[J]. 电子技术与软件工程, 2013(8): 44-45.
[3] 易小飞, 康翔, 滕金佐, 等. 组合式过电压保护器在防雷方面存在的问题探讨[J]. 工矿自动化, 2012, 38(9): 87-90.
[4] 佘林林. 过电压保护器爆炸事故分析及防治[J]. 新疆钢铁, 2014(3): 54-55.
[5] 杨庆贺. 一起发电厂10kV互感器柜过电压保护器爆炸事故的分析[J]. 电工电气, 2021(2): 40-43.
[6] 吴桂林, 吴梅, 丁佳, 等. 自脱离式过电压保护器在企业电网中的应用[J]. 应用能源技术, 2018(3): 49-51.
[7] 戈宝石, 翟文华. 一起过电压保护器放炮事故的分析[J]. 冶金与材料, 2020, 40(2): 172-173.
[8] 张一尘. 高电压技术[M]. 北京: 中国电力出版社, 2000.
[9] 陈军. 10kV系统三相四柱组合式过电压保护器运行存在的问题及处理方案[J]. 河南科技, 2013(9): 36.
[10] 刘智慧, 顾沈卉, 任晓洲, 等. 变电所10kV系统过电压事故分析及建议[J]. 电工技术, 2014(7): 42-43.
[11] 罗新. 主变10.5kV侧母线接地保护技术[J]. 电工技术, 2003(10): 10-11.
[12] 万寿雄. 10kV不接地系统两相故障导致电压互感器避雷器爆炸事故分析[J]. 电气技术, 2021, 22(11): 56-62, 79.
[13] 彭志先. 自动脱离式过电压保护器原理及应用[J]. 中国井矿盐, 2020, 51(3): 35-37.
[14] 董盼, 杨鑫, 贾鹏飞, 等. 10kV高压开关柜安全性能的提升方法[J]. 电工技术学报, 2022, 37(11): 2733-2742.
[15] 李海莉. 10kV TBP型过电压保护器爆炸原因分析及对策[C]//2017第五届炼铁对标、节能降本及新技术研讨会论文集, 扬州, 2017: 576-578.
[16] 朱东霞. 煤矿高压开关柜带间隙过电压保护器存在的安全隐患[J]. 能源与节能, 2018(11): 105-106.
[17] 刘晓鹏, 董曼玲, 邓虎威, 等. 空气间隙击穿后放电通道内的气体运动特性[J]. 电工技术学报, 2021, 36(13): 2667-2674.
[18] 杨培花. 变电所几起操作过电压保护器的故障分析和改进措施[C]//2003全国冶金供用电专业年会论文集, 青田, 2003: 108-111.
[19] 交流电气装置的过电压保护和绝缘配合: DL/T 620—1997[S]. 北京: 中国电力出版社, 1997.
[20] 廖维东, 韦玮, 吴双杰. 开关柜内三相组合式过电压保护器的维护[J]. 电力安全技术, 2021, 23(2): 57-60.
[21] 陈莉, 张瑞明, 宋莉莉. 一起35kV电容式电压互感器二次电压异常分析[J]. 电气技术, 2021, 22(2): 59-62.
[22] 黄灵资, 刘昊. 基于带电检测技术的一起35kV金属氧化物避雷器缺陷分析[J]. 电气技术, 2019, 20(1): 112-115.