| 利用母线CVT响应电流实现变电站雷电侵入波在线监测 |
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| 引用本文： | 彭向阳,钱冠军,王红斌,吕鸿,余钢华,高峰.利用母线CVT响应电流实现变电站雷电侵入波在线监测[J].电网技术,2011(7). |
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| 作者姓名： | 彭向阳 钱冠军 王红斌 吕鸿 余钢华 高峰 |
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| 作者单位： | 广东电力科学研究院;武汉三相电力科技有限公司;华中科技大学电气与电子工程学院; |
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| 摘 要： | 介绍了110 kV以上变电站雷电侵入波在线监测的基本原理,以及高频下电容式电压互感器(capacitor voltage transformer,CVT)回路电阻、电感、电容等值参数计算方法并通过仿真模型分析了等值参数计算误差对过电压监测的影响。提出了一种基于CVT响应电流的侵入波在线监测方法,以克服现有研究存在的不足。基于这种监测方法,开发了一种利用变电站母线CVT回路电流实现母线过电压监测的系统,通过该系统可以进行进线段侵入波电流和母线过电压的监测,实现变电站事故监测统计的自动化、智能化和信息化。最后通过电磁暂态程序(alternative transient program,ATP)仿真结果和现场运行中实测波形的对比,说明了监测系统可以持续有效运行。
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| 关 键 词： | 雷电侵入波 过电压 在线监测 电容式电压互感器 等值参数 |
On-Line Monitoring of Lightning Surge Intruding Into Substation by Current Response of Busbar Capacitor Voltage Transformer |
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| Affiliation: | PENG Xiangyang1,QIAN Guanjun2,WANG Hongbin1,Lü Hong1,YU Ganghua2,GAO Feng3(1.Guangdong Electric Power Research Institute,Guangzhou 510080,Guangdong Province,China,2.Wuhan Sunshine Power Science & Technology Co.,Ltd.,Wuhan 430074,Hubei Province,3.College of Electrical and Electronic Engineering,Huazhong University of Science and Technology,China) |
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| Abstract: | The basic principle of on-line monitoring of lightning surge intruding into substations of 110 kV and above voltage classes as well as the calculation of equivalent parameters of resistance,inductance and capacitance in the loop circuit of capacitor voltage transformer(CVT) under high-frequency are presented.The influences of calculation errors of equivalent parameters on overvoltage monitoring are analyzed by simulation model.An approach for on-line monitoring of lightning surge intruding into substation b... |
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| Keywords: | intrusion of lightning surge over-voltage online monitoring capacitor voltage transformer(CVT) equivalent parameters |
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