| 引用本文: | 蒋 冲,范必双,徐向前,等.计及传热效应的配电网弧光接地故障模型及混合消弧方法研究[J].电力系统保护与控制,2025,53(15):1-12. |
| JIANG Chong,FAN Bishuang,XU Xiangqian,et al.Research on arc grounding fault model considering heat transfer effects and hybrid arc suppression method for distribution networks[J].Power System Protection and Control,2025,53(15):1-12 |
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| 摘要: |
| 配电网弧光接地故障(arc grounding faults, AGF)易引发保护拒动与次生灾害。现有模型因忽略接地介质击穿与电弧传热效应，难以准确表征弧光高阻接地故障(arc high-resistance grounding faults, AHGF)的动态特性，且传统消弧方法存在高阻工况适应性差的缺陷。为此，首先提出一种计及传热效应的配电网AGF故障模型及混合消弧方法，建立融合介质击穿特性与电阻率温变模型的接地电阻模型。然后，构建变尺寸Mayr-Cassie电弧传热耦合模型，设计无源消弧与有源消弧串联的混合消弧拓扑，降低有源消弧的有功功率占比。最后，基于MATLAB/Simulink仿真与白桦、红土、混凝土3类典型接地介质的真型配电网AGF故障实验结果表明：所提AGF模型能准确有效表征故障特性，其全周期电流波形相关系数达0.8734~0.9173。所提混合消弧方法能对各AHGF故障进行有效、可靠消弧。 |
| 关键词: 配电网 弧光接地故障 介质击穿 传热效应 混合消弧 |
| DOI：10.19783/j.cnki.pspc.241399 |
| 分类号: |
| 基金项目:国家自然科学基金项目资助(52277077) |
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| Research on arc grounding fault model considering heat transfer effects and hybrid arc suppression method for distribution networks |
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JIANG Chong1, 2, FAN Bishuang1, 2, XU Xiangqian1, 2, HUANG Yunhong1, 2, WANG Wen1, 2, YU Kun1, 2
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1. College of Electrical and Information Engineering, Changsha University of Science and Technology,
Changsha 410114, China; 2. State Key Laboratory of Disaster Prevention & Reduction for Power Grid,
Changsha University of Science & Technology, Changsha 410114, China
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| Abstract: |
| Arc grounding faults (AGF) in distribution networks can trigger protection maloperation and secondary hazards. Existing fault models often fail to accurately represent the dynamic characteristics of arc high-resistance grounding faults (AHGF) due to neglected dielectric breakdown and arc heat transfer effects. Additionally, conventional arc suppression methods exhibit poor adaptability under high-resistance conditions. To address these issues, this paper proposes an AGF model incorporating heat transfer effects and a hybrid arc suppression method. A grounding resistance model is established that integrates dielectric breakdown characteristics with temperature-dependent resistivity. A variable- dimension Mayr-Cassie arc model with thermal coupling is developed. A series-connected hybrid topology combining passive and active arc suppression is designed to reduce active suppression’s active power consumption. Finally, experimental and simulation results based on MATLAB/Simulink and real distribution network AGF tests with three typical grounding media (birch, red soil, and concrete) demonstrate that, the proposed AGF model can accurately represent fault characteristics, achieving full-cycle current waveform correlation coefficient of 0.8734~0.9173. The proposed hybrid arc suppression method can effectively and reliably suppress various AHGF faults. |
| Key words: distribution network arc grounding faults dielectric breakdown heat transfer effect hybrid arc suppression |
