| 小电阻接地系统间歇性弧光过电压分析 |
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| 引用本文： | 童奕宾,尤智文,李姝. 小电阻接地系统间歇性弧光过电压分析[J]. 电力系统及其自动化学报, 2012, 0(3): 116-120 |
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| 作者姓名： | 童奕宾 尤智文 李姝 |
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| 作者单位： | 上海市电力公司市区供电公司;上海市电力公司信息通信中心 |
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| 摘 要： | 利用PSCAD/EMTDC软件建立了中性点经小电阻接地系统的仿真平台,使用接地电弧模型模拟间歇性电弧接地故障,并结合工频熄弧理论分析弧光过电压的产生情况。首先分析中性点不接地系统发生间歇性电弧接地故障时弧光过电压的情况,通过仿真证实这种接地方式容易发生弧光过电压;然后分析在中性点经小电阻接地系统中两种间歇性电弧接地故障引起过电压的情况。最后得出结论:中性点经小电阻接地方式可以较好地抑制间歇性弧光接地过电压的产生。
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| 关 键 词： | 小电阻接地 过电压 间歇性电弧 仿真 |
Analysis of Intermittent Arc Overvoltages in Low Resistance Grounded Systems |
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| TONG Yi-bin,YOU Zhi-wen,LI Shu. Analysis of Intermittent Arc Overvoltages in Low Resistance Grounded Systems[J]. Proceedings of the CSU-EPSA, 2012, 0(3): 116-120 |
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| Authors: | TONG Yi-bin YOU Zhi-wen LI Shu |
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| Affiliation: | 1.Urban Power Supply Company,Shanghai Municipal Electric Power Company, Shanghai 200080,China; 2.Information Communication Center,Shanghai Municipal Electric Power Company, Shanghai 200032,China) |
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| Abstract: | A simulation platform about the low resistance grounded system,where the grounded arc model is used to simulate the intermittent arc earth fault,is constructed by the use of the PSCAD/EMTDC in this paper.The arc extinction theory of power frequency is applied to analyze the principle of overvoltage.Firstly,arc overvoltages in the isolated neutral system are presented and verified that the overvoltages easily happen when the intermittent arc earth fault occurs by simulations.Secondly,two kinds of intermittent arc earth fault in the low resistance grounded system are analyzed.Finally,the conclusion is obtained that the low resistance grounded system can effectively suppress the overvoltage. |
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| Keywords: | low resistance grounding overvoltage intermittent arc simulation |
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