| 纵联零序方向保护零序弱馈拒动的改进方案及其仿真 |
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| 引用本文： | 刘浩,韦芬卿,俞波,戴列峰,苏理,姚吉文,伍小刚.纵联零序方向保护零序弱馈拒动的改进方案及其仿真[J].电力系统自动化,2009,33(22):75-78. |
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| 作者姓名： | 刘浩 韦芬卿 俞波 戴列峰 苏理 姚吉文 伍小刚 |
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| 作者单位： | 1. 国电南瑞科技股份有限公司,江苏省南京市,210061
2. 国网电力科学研究院/南京南瑞集团公司,江苏省甫京市,210003 |
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| 摘 要： | 线路发生接地故障时,两侧零序阻抗相差过大将导致两侧零序电流差别过大,虽然两侧的零序方向元件均能正确动作,但是由于一侧零序电流达不到动作定值,从而造成纵联零序方向保护拒动.文中针对这种零序弱馈现象的产生进行了仿真分析,并且提出了针对零序弱馈的纵联零序方向保护的改进方案,进行了验证.实时数字仿真试验结果表明该方案解决了零序弱馈时的纵联零序保护拒动问题,有效改善了纵联接地保护的性能.
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| 关 键 词： | 零序方向 弱馈 纵联保护 |
| 收稿时间： | 2009/4/17 0:00:00 |
| 修稿时间： | 2009/11/5 0:00:00 |
Improvement on Pilot Zero Sequence Directional Protection to Avoid Miss Operation Due to Zero Sequence Weak-infeed and Its Simulation |
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| LIU Hao,WEI Fenqing,YU Bo,DAI Liefeng,SU Li,YAO Jiwen,WU Xiaogang.Improvement on Pilot Zero Sequence Directional Protection to Avoid Miss Operation Due to Zero Sequence Weak-infeed and Its Simulation[J].Automation of Electric Power Systems,2009,33(22):75-78. |
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| Authors: | LIU Hao WEI Fenqing YU Bo DAI Liefeng SU Li YAO Jiwen WU Xiaogang |
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| Affiliation: | LIU Hao1,WEI Fenqing2,YU Bo1,DAI Liefeng1,SU Li1,YAO Jiwen1,WU Xiaogang1 (1. NARI Technology Development Limited Company,Nanjing 210061,China,2. State Grid Electric Power Research Institute,Nanjing 210003,China) |
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| Abstract: | When ground faults occur on transmission lines,zero sequence currents of both ends will be very different from each other if there is a significant difference between the zero sequence impedance of both ends. Pilot zero sequence directional protection may fail to operate because the zero sequence current on one end does not reach the set value of the protective relay,although zero sequence directional elements on both ends operate correctly. This paper performs a simulation analysis on the phenomenon of zer... |
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| Keywords: | zero sequence direction weak-infeed pilot relay |
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