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| 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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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.
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Received: 24 May 2021
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| Cite this article: |
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WAN Shouxiong. Analysis of explosion fault of potential transformer arrester caused by phase-to-phase fault of 10kV ungrounded system[J]. Electrical Engineering, 2021, 22(11): 56-62.
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| URL: |
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http://dqjs.cesmedia.cn/EN/Y2021/V22/I11/56
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[1] 董振亚. 城市配电网中性点接地方式的发展和改进[J]. 中国电力, 1998, 31(8): 38-41.
[2] GRCEV L.Modelling of grounding systems for better protection of communication installations against effects from electric power system and lightning[C]// 23th International Telecommunications Energy Con-ference, 2001: 461-468.
[3] 李雷, 罗容波, 王岩, 等. 基于10kV配电网PT频繁故障的仿真与改进措施研究[J]. 电力系统保护与控制, 2014, 42(14): 132-137.
[4] 梁志瑞, 董维, 刘文轩, 等. 电磁式电压互感器的铁磁谐振仿真研究[J]. 高压电器, 2012, 48(11): 18-23.
[5] 郭崇伙. 6~10kV配电网电压互感器消谐的分析及对策[J]. 山东电力技术, 2009(3): 52-54.
[6] 付久龙. 35kV供电系统母线PT铁磁谐振故障分析对策[J]. 电工技术, 2017(7): 102-105.
[7] 龚庆武, 张静, 雷加智, 等. 基于原子分解法的中性点不接地系统铁磁谐振检测[J]. 电工技术学报, 2018, 33(5): 1114-1124.
[8] 贾敬礼. 500kV气体绝缘金属封闭开关设备电压互感器谐振问题分析[J]. 电气技术, 2020, 21(8): 103-106.
[9] 黄宗彬. 基于35kV母线的PT谐振分析[J]. 电气技术, 2017, 18(5): 143-145.
[10] 周丽霞, 尹忠东, 郑立. 配网PT铁磁谐振机理与抑制的试验研究[J]. 电工技术学报, 2007, 22(5): 153-158.
[11] 许志龙, 黄建华, 王大忠. 10kV电网TV铁磁谐振过电压数字仿真及研究[J]. 电力自动化设备, 2001, 21(2): 27-29. |
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2021, Vol. 22 
