| 配电网间歇性电弧接地过电压的仿真分析与对策 |
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| 引用本文： | 韩爱芝,曾定文,鲁铁成.配电网间歇性电弧接地过电压的仿真分析与对策[J].高压电器,2010,46(1). |
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| 作者姓名： | 韩爱芝 曾定文 鲁铁成 |
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| 作者单位： | 1. 平顶山供电公司,河南,平顶山,467000
2. 武汉大学电气工程学院,湖北,武汉,430072 |
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| 摘 要： | 在中性点不接地系统中,因间歇性电弧接地产生的过电压较高,且持续时间长,可能危及设备绝缘,甚至引起相间短路。采用仿真计算的方法,研究了10 kV和35 kV系统的间歇性电弧接地过电压,计算结果表明过电压的大小与系统参数、接地电弧的熄弧时间、电弧重燃次数和弧道电阻等因素有关。在最不利的情况下,过电压可达4.5倍以上。并结合实际系统提出了多种防范措施。
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| 关 键 词： | 中性点不接地系统 间歇性电弧过电压 仿真 防止对策 |
Simulation of Intermittent Arc Earthing Over-voltage and Countermeasure |
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| HAN Ai-zhi,ZENG Ding-wen,LU Tie-cheng.Simulation of Intermittent Arc Earthing Over-voltage and Countermeasure[J].High Voltage Apparatus,2010,46(1). |
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| Authors: | HAN Ai-zhi ZENG Ding-wen LU Tie-cheng |
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| Affiliation: | 1.Pingdingshan Power Supply Bureau;Pingdingshan 467000;China;2.School of Electrical Engineering;Wuhan University;Wuhan 430072;China |
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| Abstract: | In ungrounded systems,the over voltage caused by intermittent arc earthing is high with long duration,which is harmful to the insulation of electric equipment,and even causes inter-phase short circuit fault.In this paper,simulations about 10 kV and 35 kV systems are performed to investigate the intermittent arc earthing over-voltage,and the results show that over-voltage level is related to system parameters,arc extinction time and number,arc resistance,and so on.In the worst circumstance,the over-voltage c... |
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| Keywords: | ungrounded system intermittent electric arc earthing over-voltage simulation countermeasure |
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