| 引用本文: | 朱革兰,李松奕,兰金晨,曾德辉,刘胤良.基于零序特征量的配电网接地故障区段定位方法[J].电力自动化设备,2021,41(1): |
| ZHU Gelan,LI Songyi,LAN Jinchen,ZENG Dehui,LIU Yinliang.Fault section location method for grounding fault of distribution network based on zero-sequence characteristic[J].Electric Power Automation Equipment,2021,41(1): |
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| 摘要: |
| 针对现有配电网故障区段定位方法存在对不同接地故障的适应性不强、灵敏度低等问题，分析了谐振接地配电网在发生经不同过渡电阻接地故障时，故障点上、下游的零序电流和零序电压暂态分量的特征，得出了故障点上、下游零序电流在1个工频周期内的积分与零序电压差值的比值(零序特征量)存在较大差别的结论。基于这一结论提出一种能够适用于谐振接地配电网接地故障区段定位的方法。仿真结果表明所提故障区段定位方法在高阻接地故障、低阻接地故障和非线性弧光接地故障下都具有较好的可行性。 |
| 关键词: 配电网 故障区段定位 谐振接地 零序特征量 配电自动化 |
| DOI：10.16081/j.epae.202012022 |
| 分类号:TM773 |
| 基金项目:广东省自然科学基金资助项目(2018A030310354) |
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| Fault section location method for grounding fault of distribution network based on zero-sequence characteristic |
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ZHU Gelan1, LI Songyi1, LAN Jinchen1, ZENG Dehui1, LIU Yinliang2
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1.College of Electric Power, South China University of Technology, Guangzhou 510641, China;2.Electric Power Research Institute, China Southern Power Grid, Guangzhou 510063, China
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| Abstract: |
| The existing fault section location methods of distribution network have been found with poor adaptability to different grounding faults, low sensitivity and other problems, aiming at which, the characteristics of zero-sequence current and zero-sequence voltage transient components at upstream and downstream of the fault point under different transition resistances when a grounding fault occurs in the resonance grounding distribution network are analyzed. It is concluded that the ratio between the integral of the zero-sequence current within a power frequency period and the zero-sequence voltage, i. e. the zero-sequence charac-teristic, at the upstream of the fault point is significantly different from that at the downstream of the fault point. Based on this conclusion, a fault section location method that can be used in resonance grounding distribution network is proposed. The simulative results show that the proposed fault section location method is feasible for high-resistance grounding fault, low-resistance grounding fault and nonlinear arc grounding fault. |
| Key words: distribution network fault section location resonant grounding zero-sequence characteristic distribution automation |
