| 引用本文: | 周泽华,曾祥君,喻 锟,等.基于故障点虚拟映射的配电网行波定位新方法[J].电力系统保护与控制,2026,54(08):58-69. |
| ZHOU Zehua,ZENG Xiangjun,YU Kun,et al.A new traveling-wave location method in distribution networks based on virtual fault mapping[J].Power System Protection and Control,2026,54(08):58-69 |
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| 摘要: |
| 针对现有行波定位方法高度依赖各线路末端装置所捕获故障信息、在多分支配电线路中易因行波信号衰减导致定位失效的问题，提出一种基于故障点虚拟映射的配电网行波定位新方法。首先，对行波信号在配电线路中的传输机理进行分析，建立行波信号衰减数学模型，揭示现有行波定位法失效原因并为后续装置布点策略提供理论依据。然后，通过分析有效检测区域行波定位装置采集信号并联立故障分支判定矩阵，逐步缩小故障区域。最终实现故障精准定位。试验结果表明，该方法不受过渡电阻、故障类型与电网拓扑结构变化的影响，在大部分行波定位装置失效的情况下仍能实现故障点精准定位，能有效提高行波法在配电网故障定位中的工程应用价值。 |
| 关键词: 配电网 行波定位 信号衰减机理 故障虚拟映射 |
| DOI：10.19783/j.cnki.pspc.250740 |
| 分类号: |
| 基金项目:国家自然科学基金重点项目 (52037001)；湖湘青年英才科技创新类 (荷尖) 项目 (2023RC3141)；湖南省教育厅一般项目 (24C0179) |
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| A new traveling-wave location method in distribution networks based on virtual fault mapping |
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ZHOU Zehua, ZENG Xiangjun, YU Kun, ZENG Jupeng, WANG Zhan
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National Key Laboratory of Disaster Prevention and Reduction for Power Grid (Changsha University of Science and Technology), Changsha 410114, China
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| Abstract: |
| Existing traveling-wave fault location methods highly depend on fault information captured by devices at the terminals of each feeder, and are prone to failure in multi-branch distribution networks due to signal attenuation. To address this issue, a novel traveling-wave fault location method for distribution networks based on fault point virtual mapping is proposed. First, the propagation mechanism of traveling-wave signals in distribution lines is analyzed, and a mathematical model of signal attenuation is established, revealing the failure mechanism of conventional traveling-wave fault location methods and providing a theoretical basis for subsequent device placement strategies. Then, by analyzing the signals collected by traveling-wave locating devices within the effective detection region and constructing a fault branch determination matrix, the fault region is progressively narrowed down. Finally, accurate fault location is achieved. Experimental results show that the proposed method is insensitive to transition resistance, fault type, and variations in network topology. It can still achieve accurate fault location even when most traveling-wave locating devices fail, significantly improving the practical applicability of traveling-wave-based methods in distribution network fault location. |
| Key words: distribution network traveling-wave fault location signal attenuation mechanism virtual fault mapping |
