| 220kV线路故障引起110kV系统保护异常动作的研究分析 |
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| 引用本文： | 薛峰,谢夏寅,孙徐龙,周瑾,童勤毅. 220kV线路故障引起110kV系统保护异常动作的研究分析[J]. 江苏电机工程, 2010, 29(4): 51-53 |
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| 作者姓名： | 薛峰 谢夏寅 孙徐龙 周瑾 童勤毅 |
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| 作者单位： | 1. 苏州供电公司,江苏,苏州,215004
2. 吴江供电公司,江苏,吴江,215200 |
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| 摘 要： | 分析了强电源附近的220kV馈供线路发生单相接地故障后，较高的零序电压引起所供110kV系统主变中性点间隙击穿后又造成110kV线路距离保护异常动作的原因。并提出对于强电源附近的馈供线路发生接地故障时抑制零序电压的建议和防止相关保护不正确动作的措施。
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| 关 键 词： | 线路故障 中性点间隙 击穿 保护动作 |
Analysis of Abnormal Relay Action on 110 kV Power System Caused by 220 kV Line Fault |
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| XUE Feng,XIE Xia-yin,SUN Xu-long,ZHOU Jin,TONG Qin-yi. Analysis of Abnormal Relay Action on 110 kV Power System Caused by 220 kV Line Fault[J]. Jiangsu Electrical Engineering, 2010, 29(4): 51-53 |
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| Authors: | XUE Feng XIE Xia-yin SUN Xu-long ZHOU Jin TONG Qin-yi |
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| Affiliation: | 1. Suzhou Power Supply Company, Suzhou 215021, China; 2.Wujiang Power Supply Company, Wujiang 215200, China) |
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| Abstract: | After the occurring of single-phase grounding fault of 220kV circuit near large power supply, high zero sequence voltage induces breakdown of the neutral point gap in the 110KV system＇s main transformer and abnormal actions of distance protection in the 110kV line. The cause of this accident is analyzed in this paper. Suggestions of mitigating zero sequence voltage and measures of preventing incorrect actions of relative protection are proposed when grounding fault occurs near the large power supply. |
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| Keywords: | line fault neutral point gap breakdown relay action |
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