Simulation of Intermittent Arc Earthing Over-voltage and Countermeasure

HAN Ai-zhi1; ZENG Ding-wen1; LU Tie-cheng2

doi:10.13296/j.1001-1609.hva.2010.01.007

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Simulation of Intermittent Arc Earthing Over-voltage and Countermeasure

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- Simulation of Intermittent Arc Earthing Over-voltage and Countermeasure
- High VoltageApparatus Vol. 46, Issue 1, Pages: 72-75(2010)
- 作者机构：
  
  1. 平顶山供电公司
  2. 武汉大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2010.01.007
  CLC： TM862
- Published：2010
- 稿件说明：
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[1]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(01):72-75.

HAN Ai-zhi1, ZENG Ding-wen1, LU Tie-cheng2. Simulation of Intermittent Arc Earthing Over-voltage and Countermeasure[J]. High voltageapparatus, 2010, 46(1): 72-75.
[1]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(01):72-75. DOI： 10.13296/j.1001-1609.hva.2010.01.007.

HAN Ai-zhi1, ZENG Ding-wen1, LU Tie-cheng2. Simulation of Intermittent Arc Earthing Over-voltage and Countermeasure[J]. High voltageapparatus, 2010, 46(1): 72-75. DOI： 10.13296/j.1001-1609.hva.2010.01.007.

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。

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 can increase by 3.5 times.Moreover

some countermeasures to prevent intermittent arc earthing over-voltage are suggested for actual system.

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