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中国电机工程学报 2007, 27(34) 70-75 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 电力系统 |
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基于方向行波的小电流接地系统故障选线 |
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张帆 潘贞存 张慧芬 郑罡 马姗姗 |
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山东大学电气工程学院 山东大学电气工程学院 济南大学控制科学与工程学院 山东大学电气工程学院 山东大学电气工程学院 |
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摘要：
从行波传输的角度出发，对小电流接地系统发生故障时的暂态过程进行分析，并通过分析得出以下结论：故障线路的反向电压行波和正向电压行波同时到达，而非故障线路的反向电压行波滞后正向电压行波一定时间后到达；并且故障线路和非故障线路正向电压行波的初始极性相反。利用这两个特征，提出基于正、反向行波能量之比和正向电压行波初始极性的故障选线新判据。通过暂态仿真软件ATP进行仿真，结果证实了上述原理的有效性，且不受故障初相角和过渡电阻的影响。
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关键词：
小电流接地系统
正向行波
反向行波
故障选线
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Fault Line Selection in Non-solidly Earthed Network Based on Direction Traveling Wave |
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ZHANG Fan |
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Abstract:
Using the traveling wave technology, this paper analyzes the transient state process of non-solidly earthed network in detail when single phase earth fault occurring, and discovered the follow conclusions: in the fault line, forward voltage traveling wave and the backward voltage traveling wave are both arrived, but in the healthy lines, the arrival time of the backward voltage traveling wave lagged behind that of the forward voltage traveling wave certain amount; the initial polarity of forward voltage traveling wave in the fault line and the health line is extremely opposite. According to those two characteristics, this paper proposed new criterion of fault line selection based on the ratio of the forward and backward traveling wave energy and the forward voltage traveling wave polarity. This criterion won't be affected by fault initial phase angle and transition resistance. The effectiveness of the criterion has been verified by the ATP simulation results.
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Keywords:
indirectly grounding power system
forward traveling wave
backward traveling wave
fault line detection
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收稿日期 2006-08-08 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 张帆 |
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作者简介: |
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作者Email: zhangfan1204@mail.sdu.edu.cn,zfkyl@163.com |
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| 参考文献： |
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| 本刊中的类似文章 |
| 1．林湘宁 翁汉琍 吴科成 刘海峰 刘沛.小电流接地系统自适应单相接地保护新原理[J]. 中国电机工程学报, 2006,26(2): 52-57 |
| 2．庞清乐 孙同景 钟麦英 杨福刚.基于粗集理论的小电流接地系统故障选线[J]. 中国电机工程学报, 2007,27(4): 60-64 |
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| Copyright by 中国电机工程学报 |
