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| 基于估算对侧电源阻抗的自适应距离保护算法 | |
| 引用本文： | 张华中,朱玲玲,张洪涛,韩爱芝,李新伟,刘中印. 基于估算对侧电源阻抗的自适应距离保护算法[J]. 电力系统自动化, 2011, 35(12): 70-75 |
| 作者姓名： | 张华中 朱玲玲 张洪涛 韩爱芝 李新伟 刘中印 |
| 作者单位： | 周口供电公司,河南省周口市,466000 |
| 摘 要： | 在系统两端电源电势幅值比相等的假设下,基于故障前电源电势与负荷电流之间的相位关系合理地估算出对侧电源阻抗值.利用传统距离保护的测量阻抗和保护处实时相量建立起计算线路故障电抗和电阻的自适应数学模型,2个模型都为正序电流分支系数的相角的函数.根据测量阻抗的电抗分量和电阻分量与正序电流分支系数的相角之间的增减关系分别提出了防止保护拒动和超越的解决办法.仿真结果证明,这种距离保护性能令人满意,提高了保护的可靠性和灵敏度. |
| 关 键 词： | 自适应距离保护 过渡电阻 测量阻抗 对侧电源阻抗 正序电流分支系数 |
| 收稿时间： | 2010-11-17 |
| 修稿时间： | 2011-06-07 |
Adaptive Distance Protection Algorithm Based on Estimation of Contralateral Source Impedance |
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| ZHANG Huazhong,ZHU Lingling,ZHANG Hongtao,HAN Aizhi,LI Xinwei,LIU Zhongyin. Adaptive Distance Protection Algorithm Based on Estimation of Contralateral Source Impedance[J]. Automation of Electric Power Systems, 2011, 35(12): 70-75 | |
| Authors: | ZHANG Huazhong ZHU Lingling ZHANG Hongtao HAN Aizhi LI Xinwei LIU Zhongyin |
| Affiliation: | ZHANG Huazhong,ZHU Lingling,ZHANG Hongtao,HAN Aizhi,LI Xinwei,LIU Zhongyin (Zhoukou Power Supply Corporation,Zhoukou 466000,China) |
| Abstract: | Under the assumption of equal electromotive force(EMF) amplitude ratio of both ends in power systems,based on the pre-fault phase relationship between EMF and load current the contra-lateral source impedance is legitimately estimated.With measured impedance of traditional distance protection and real-time phasors on protection location,adaptive math models for calculating both resistance and reactance of line fault are established.Both models are functions of positive-sequence current branch coefficient pha... |
| Keywords: | adaptive distance protection transition resistance measured impedance contralateral power source impedance positive-sequence current branch coefficient |
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