| 220kV南冶变电站1号主变差动保护误动原因分析 |
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| 引用本文： | 戴厚民.220kV南冶变电站1号主变差动保护误动原因分析[J].红水河,2011(6):118-122. |
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| 作者姓名： | 戴厚民 |
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| 作者单位： | 南方有色冶炼有限责任公司 |
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| 摘 要： | 通过对220 kV南冶变电站1号主变压器差动保护误动的事故原因分析,发现保护误动是由安装在差动保护用电流互感器上的电流互感器过电压保护器误动引起的,指出在保护用电流互感器二次回路设置电流互感器过电压保护器存在安全隐患,宜慎用.
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| 关 键 词： | 主变压器 差动保护 误动 电流互感器 过电压保护器 |
Analysis on Causes for Differential Protection Malfunction of No.1 Main Transformer in 220kV Nanye Substation |
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| DAI Hou-min.Analysis on Causes for Differential Protection Malfunction of No.1 Main Transformer in 220kV Nanye Substation[J].Hongshui River,2011(6):118-122. |
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| Authors: | DAI Hou-min |
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| Affiliation: | DAI Hou-min (Nanfang Non-ferrous Metal Smelt Co.,Ltd.,Guangxi Hechi 5470007) |
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| Abstract: | Based on analysis on causes for differential protection malfunction of No.1 main transformer in 220kV Nanye substation,it is found that the differential protection malfunction is caused due to malfunction of over-voltage protector on current transformer installed for differential protection.The paper points out there are security risks in the over-voltage protector setting on secondary circuit of current transformer for differential protection,which should be used with caution. |
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| Keywords: | main transformer differential protection malfunction current transformer over-voltage protection |
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