| 引用本文: | 徐萌,邹贵彬,陈宁,张健,马玉伟.基于故障超前相的有源配电网能量方向纵联保护方法[J].电力自动化设备,2017,37(1): |
| XU Meng,ZOU Guibin,CHEN Ning,ZHANG Jian,MA Yuwei.Energy-directional pilot protection based on leading-phase for active distribution network[J].Electric Power Automation Equipment,2017,37(1): |
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| 摘要: |
| 基于不同故障类型下各故障相能量函数的特征分析，提出了一种适用于有源配电网的能量方向纵联保护方法。针对配电网中性点非有效接地的网络特点，建立了基于故障超前相的故障识别判据，并构造了能量函数幅值辅助判据以克服区内分支负荷投切对故障判别的影响；研究了基于正序分量控制的逆变型分布式电源接入配电网情形下所提保护原理的适应性。仿真结果表明，所提保护方法能够正确识别故障方向，并能躲过负荷投切的影响，且具有一定的抗过渡电阻的能力。 |
| 关键词: 有源配电网 分布式电源 超前相 能量函数 故障分量 方向纵联保护 电力系统保护 |
| DOI：10.16081/j.issn.1006-6047.2017.01.010 |
| 分类号: |
| 基金项目:国家高技术研究发展计划(863计划)资助项目(2012AA050213)；山东省重点研发计划资助项目(2015GGX101011) |
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| Energy-directional pilot protection based on leading-phase for active distribution network |
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XU Meng1, ZOU Guibin1, CHEN Ning2, ZHANG Jian2, MA Yuwei1
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1.School of Electrical Engineering, Shandong University, Ji’nan 250061, China;2.State Gird Shandong Electric Power Company Zaozhuang Electric Power Company, Zaozhuang 277100, China
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| Abstract: |
| Based on the characteristic analysis of fault-phase energy function for different fault types, a method of energy-directional pilot protection is proposed. According to the characteristics of distribution network with ineffectively-grounded neutral point, a fault recognition criterion based on the leading-phase is established and an auxiliary criterion based on the amplitude of energy function is added to get over the impact of in-zone branch load switching on the fault recognition. Its adaptability to the distributed generators which are connecting with the distribution network via inverter based on the positive-sequence component control is studied. Simulative results show the proposed method is immune to the transition resistance to a certain extent and able to recognize the fault directions correctly and get over the impact of load switching. |
| Key words: active distribution network distributed generator leading phase energy function fault component directional pilot protection electric power system protection |
