| 关于小电流接地系统中谐振过电压的分析与探讨 |
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| 引用本文： | 贺要锋,商建华,封晓东,王伟.关于小电流接地系统中谐振过电压的分析与探讨[J].电力系统保护与控制,2006,34(23):66-69. |
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| 作者姓名： | 贺要锋 商建华 封晓东 王伟 |
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| 作者单位： | 河南省电力公司许昌供电公司 河南许昌461000(贺要锋，商建华，封晓东)，许继日立公司 河南许昌461000(王伟) |
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| 摘 要： | 在小电流接地系统中出现谐振过电压时,会造成电力设备损坏,对电网安全运行产生不良影响。结合运行中的实例,阐述了谐振过电压的产生原因以及出现基波谐振过电压、高次谐波或分次谐波谐振过电压时的不同特征,提出在电磁式电压互感器的开口三角绕组接入适当阻尼电阻、在母线上加装对地电容、采取临时的倒闸措施、选用励磁特性较好的电压互感器或电容式电压互感器等可行预防措施。
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| 关 键 词： | 小电流接地 谐振过电压 设备损坏 |
| 文章编号： | 1003-4897(2006)23-0066-04 |
| 收稿时间： | 2006-06-26 |
| 修稿时间： | 2006-10-24 |
Analysis of syntonic overvoltage in neutral indirectly grounded system |
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| HE Yao-feng,SHANG Jian-hua ,FENG Xiao-dong , WANG Wei.Analysis of syntonic overvoltage in neutral indirectly grounded system[J].Power System Protection and Control,2006,34(23):66-69. |
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| Authors: | HE Yao-feng SHANG Jian-hua FENG Xiao-dong WANG Wei |
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| Affiliation: | 1. Xuchang Electricity Supply Bureau,Xuchang 461000, China; 2. M-Hitachi Company, Xuchang 461000,China |
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| Abstract: | Syntonic overvoltage in neutral indirectly grounded system can make equipments damaged,and bad influence on the safety of electric power system.Combining operation example,this paper expatiates the cause of syntonic overvoltage and different characteristics of basic-flap,high-flap and centi-flap syntonic overvoltage.It puts forward the valid prevention measures of syntonic overvoltage,such as fixing a fit resistance at the openings triangle,adding capacitor on the bus,putting a electric line in use on the other bus and choosing transformer which have a good line of magnetic force. |
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| Keywords: | neutral indirectly grounded system syntonic overvoltage equipment damage |
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