| 变压器相间过流保护不正确动作原因的探讨 |
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| 引用本文： | 钱国明,李拥军,李颖. 变压器相间过流保护不正确动作原因的探讨[J]. 电力系统保护与控制, 2005, 33(15): 24-26 |
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| 作者姓名： | 钱国明 李拥军 李颖 |
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| 作者单位： | 1. 南京四方亿能电力自动化有限公司,江苏 南京 211101;2. 徐州电力勘察设计院,江苏 徐州 221005 |
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| 摘 要： | 针对某110kV变电站中变压器复压闭锁方向过流保护的不正确动作情况,通过对事故过程中的故障信息分析,并结合现场的模拟试验,找出了保护不正确动作的原因,传统的90°接线方式方向元件在某些特殊的故障时,会造成相间过流保护不正确动作。对故障时方向元件的向量图进行了详细的分析,并提出了解决方案。
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| 关 键 词： | 变压器 过流保护 不正确动作 方向元件 |
| 文章编号： | 1003-4897(2005)15-0024-03 |
| 收稿时间： | 2004-10-22 |
| 修稿时间： | 2004-10-22 |
Analysis and solution of an unwanted operation of transformer''''s overcurrent protection |
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| QIAN Guo-ming,LI Yong-jun,LI Ying. Analysis and solution of an unwanted operation of transformer''''s overcurrent protection[J]. Power System Protection and Control, 2005, 33(15): 24-26 |
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| Authors: | QIAN Guo-ming LI Yong-jun LI Ying |
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| Affiliation: | QIAN Guo-ming~1,LI Yong-jun~1,LI Ying~2 |
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| Abstract: | According to the unwanted operation phenomenon of the directional overcurrent relay of an 110kV transformer,it is found that the traditional directional relay using connection will lead to unwanted operation when some special fault occurs. This paper presents the analysis and solution of the unwanted operation by analyzing the fault information combining with simulation testing. |
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| Keywords: | transformer overcurrent relay unwanted operation directional relay |
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