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| Analysis of Differential Protection Malfunction Caused by Isolation for GIS Voltage Withstand Test |
| Wang Kewei |
| Huaneng Shanghai Shidongkou Second Power Plant, Shanghai 200942 |
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Abstract Due to the characteristics of One-and-a-half breaker configuration GIS, differential protection is possible to malfunction during GIS overhaul. Analyzing of the 500kV transformer differential protection accident, explore the reasons of the malfunction. Several aspects such as CT ratio selection, isolation of current loop and secondary circuit grounding point selection are summarized to avoid differential protection malfunction during voltage withstand test.
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Published: 10 October 2013
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| Cite this article: |
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Wang Kewei. Analysis of Differential Protection Malfunction Caused by Isolation for GIS Voltage Withstand Test[J]. Electrical Engineering, 2013, 14(08): 71-73.
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| URL: |
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http://dqjs.cesmedia.cn/EN/Y2013/V14/I08/71
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[1] 邱涛, 王攀峰, 张克元, 等.一起二次回路两点接地引起母线保护误动的事故分析[J]. 电力系统保护与控制, 2008, 36(24): 110-112.
[2] 蔡明, 彭淑明, 赖志刚, 等. 一起差动保护误动事故的原因分析[J]. 电工技术, 2011(11): 6-7.
[3] 周玉兰. 2004年全国电网元件保护运行情况分析[J].中国电力, 2006, 39(5): 23-26.
[4] 国家电力调度通信中心. 电力系统继电保护实用技术问答[M]. 北京: 中国电力出版社, 2000.
[5] 崔勇, 张英磊, 朱宝, 等. CT修试引起500kV主变差动保护动作分析及对策[J]. 电气技术, 2012(4): 40-43. |
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2013, Vol. 14 
