电气技术  2021, Vol. 22 Issue (11): 56-62    DOI:
电气设备检修与故障诊断 |
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
万寿雄
广西电网公司柳州供电局,广西 柳州 545000
Analysis of explosion fault of potential transformer arrester caused by phase-to-phase fault of 10kV ungrounded system
WAN Shouxiong
Liuzhou Power Supply Bureau of Guangxi Power Grid Corporation, Liuzhou, Guangxi 545000
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摘要 本文结合现场实际情况和故障录波波形对一起10kV线路两相故障导致10kV母线电压互感器避雷器爆炸的事故进行全面分析。分析表明,造成避雷器爆炸的主要原因是铁磁谐振及低频饱和电流,其中铁磁谐振造成的过电压是正常运行时的3.3倍。最后,本文提出相应的处理办法及改进措施,以减少由此造成的经济损失。
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万寿雄
关键词 ： 避雷器,  两相故障,  电压互感器,  故障分析    
Abstract：In this paper, an explosion fault of 10kV bus potential transformer arrester caused by phase-to-phase fault of 10kV line is coM Prehensively analyzed based on the actual situation and the waveforms of fault record. The main factors that cause the arrester explosion are ferromagnetic resonance and low-frequency saturation current. The overvoltage caused by ferromagnetic resonance is 3.3 times that of normal voltage. At last, the corresponding treatment and improvement measures are put forward, which is used to reduce the economic loss.
Key words： arrester    phase-to-phase fault    potential transformer    fault analysis   
收稿日期: 2021-05-24     
作者简介: 万寿雄（1991—）,男,广西玉林人,本科,主要从事变电站综合自动化和微机保护方面的研究工作。
引用本文:   
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. WAN Shouxiong. Analysis of explosion fault of potential transformer arrester caused by phase-to-phase fault of 10kV ungrounded system. Electrical Engineering, 2021, 22(11): 56-62.
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https://dqjs.cesmedia.cn/CN/Y2021/V22/I11/56