Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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某220 kV智能变电站主变间隙保护误动分析

来源:电工电气发布时间:2018-09-13 10:13 浏览次数:528
某220 kV智能变电站主变间隙保护误动分析
 
陈军1,张路2,崔大林3,南东亮2,陈龙2
(1 国网新疆电力有限公司吐鲁番供电公司,新疆 吐鲁番 838000;2 国网新疆电力有限公司电力科学研究院,新疆 乌鲁木齐 830011;
3 国网新疆电力有限公司电力调度控制中心,新疆 乌鲁木齐 830011)
 
    摘 要:通过对某220 kV智能变电站主变保护误动事故进行分析,得出影响保护误动的因素:一是专业人员对设备的原理和处理方法缺乏了解,现场难以发现一些隐性故障;二是在设备检修过程中,对安全措施的制定方法和程度难以准确掌握,容易人为造成隐性故障。指出运行及检修人员要深入了解智能变电站技术,提高继电保护运行可靠性,准确隔离电网故障。
    关键词:继电保护;非全相运行;中性点间隙保护;故障分析
    中图分类号:TM774     文献标识码:B     文章编号:1007-3175(2018)09-0038-04
 
Analysis of Main Transformer Gap Protection Malfunction in Certain 220 kV Smart Substation
 
CHEN Jun1, ZHANG Lu2, CUI Da-lin3, NAN Dong-liang2, CHEN Long2
(1 Tulufan Electric Power Supply Company of State Grid Xinjiang Power Company, Tulufan 838000, China;
2 Electric Power Research Institute of State Grid Xinjiang Power Company, Urumqi 830011 , China;
3 Electric Power Dispatching and Communication Center of State Grid Xinjiang Power Company, Urumqi 830011 , China)
 
    Abstract: Based on the analysis of main transformer protection malfunction accident in certain 220 kV smart substation, it is concluded that there were two main factors to affect on protection malfunction. On the one hand, the specialized persons did not know the principles and methods of the equipment, and it was hard to find some hidden faults at the scene, on the other hand, in the process of equipment maintenance, the method and degree of safety measures were difficult to be accurately mastered, and it was easy to cause man-made hidden faults. It is pointed out that the operation and maintenance personnel should have in-depth knowledge of smart substation technology to improve the operation reliability of relay protection.
    Key words: relay protection; open-phase operation; gap protection of transformer neutral point; fault analysis
 
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