| 两起220kV变电站主变压器跳闸故障分析 |
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| 引用本文： | 吴旭涛,邢 琳. 两起220kV变电站主变压器跳闸故障分析[J]. 防灾减灾工程学报, 2016, 0(4): 30-33 |
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| 作者姓名： | 吴旭涛 邢 琳 |
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| 作者单位： | 国网宁夏电力公司电力科学研究院, 宁夏 银川 750011;国网河北省电力公司经济技术研究院, 河北 石家庄 056002 |
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| 摘 要： | 针对某220 kV变电站连续发生的两起主变压器跳闸故障,根据故障信息及相关试验结果进行分析,找出导致主变压器跳闸的原因,提出对树脂浇注式电流互感器在投运前开展局部放电检测,在中性点非有效接地系统推广接地转移技术等措施。应用结果表明:改进措施有效防止了因树脂浇注式电流互感器主绝缘击穿导致的主变压器跳闸故障的发生。
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| 关 键 词： | 主变压器； 跳闸故障； 浇注式电流互感器； 局部放电； 绝缘击穿； 中性点非有效接地系统； 接地转移技术 |
Failure analysis on two cases of main transformer trip in 220 kV substation |
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| WU Xutao,XING Lin. Failure analysis on two cases of main transformer trip in 220 kV substation[J]. Journal of Disaster Prevention and Mitigation Engineering, 2016, 0(4): 30-33 |
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| Authors: | WU Xutao XING Lin |
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| Affiliation: | Power Research Institute of State Grid Ningxia Power Co , Yinchuan Ningxia 750011 , China; Power Economic Research Institute of State Grid Hebei Power Co , Shijiazhuang Hebei 056002 , China |
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| Abstract: | Aiming at two cases of main transformer trip fault continuously happened in a 220 kVsubstation, according to failure informations and relevant test results, finds out the causes of maintransformer trip, puts forward the measures such as to develop partial discharge detection before thecommission of resin- casting type current transformer, and to generalize the grounding transfertechnology in non- effectively neutral grounded system. The application result shows that theimproving measure can effectively prevent main transformer trip fault happening due to maininsulation breakdown of resin-casting type current transformer. |
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