| 引用本文: | 何潜,李渠佳,邓炎,孙晓勇,彭雨舟,卢继平,林有浩.有源配电网异名相两点接地故障测距算法[J].电力自动化设备,2025,45(6):64-71. |
| HE Qian,LI Qujia,DENG Yan,SUN Xiaoyong,PENG Yuzhou,LU Jiping,LIN Youhao.Different-phase two-point grounding fault location method for active distribution network[J].Electric Power Automation Equipment,2025,45(6):64-71. |
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| 摘要: |
| 随着配电网规模逐渐扩大，异名相两点接地故障发生概率增大，现有配电网故障测距算法难以实现分布式电源接入情况下，异名相两点接地故障的精确测距计算。通过建立中性点不接地系统不同故障位置下异名相两点接地故障正、负、零序网络，提出了利用不同测量单元的中性点不接地系统异名相两点接地故障测距算法，根据故障位置情况分别采用双端测距算法和单端测距算法，能够实现不同情况下中性点不接地系统异名相两点接地故障的准确测距，算法不受分支出线、过渡电阻、分布式电源出力波动等因素影响。利用PSCAD/EMTDC软件建立有源配电网模型，验证了所提算法的准确性。 |
| 关键词: 中性点不接地系统 有源配电网 异名相两点接地故障 故障测距 分支接线 |
| DOI：10.16081/j.epae.202503001 |
| 分类号:TM713 |
| 基金项目:国家自然科学基金资助项目(52077017)；国网重庆市电力公司重点科技项目(522075230001) |
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| Different-phase two-point grounding fault location method for active distribution network |
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HE Qian1, LI Qujia2, DENG Yan3, SUN Xiaoyong3, PENG Yuzhou3, LU Jiping2, LIN Youhao2
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1.State Grid Chongqing Electric Power Company, Chongqing 400015, China;2.State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China;3.Chongqing Chuandong Electric Power Co.,Ltd.,Chongqing 408000, China
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| Abstract: |
| With the gradual expansion of distribution network, the probability of different-phase two-point grounding fault increases, the existing fault location algorithms for distribution network are difficult to realize the accurate location calculation of different-phase two-point grounding fault in the case of distributed po-wer supply access. By establishing positive-,negative-and zero-sequence networks of the neutral point ungrounded system with different-phase two-point grounding faults in different fault locations, a different-phase two-point grounding fault location algorithm of the neutral point ungrounded system using different measurement units is proposed. According to the fault location, two-terminal fault location algorithm and single-terminal fault location algorithm are adopted respectively, which can realize the accurate fault location of the neutral point ungrounded system with different-phase two-point grounding fault in different situations. The algorithm is not affected by factors such as branch line, transition impedance, and output fluctuation of distributed power supply. The accuracy of the proposed algorithm is verified by modeling the active distribution network using PSCAD/EMTDC software. |
| Key words: neutral point ungrounded system active distribution network different-phase two-point grounding fault fault location branch line |
