| CT断线引起主变差动保护动作的分析与处理 |
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| 引用本文： | 李敏霞,袁文嘉,姬希军. CT断线引起主变差动保护动作的分析与处理[J]. 电力科学与工程, 2009, 25(7): 52-53 |
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| 作者姓名： | 李敏霞 袁文嘉 姬希军 |
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| 作者单位： | 许昌供电公司,河南,许昌,461000;许继电气公司,河南,许昌,461000 |
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| 摘 要： | 介绍了某变电站1号变压器在差动保护投入时的跳闸事故。通过进行现场保护特性试验、绝缘检查、二次回路电流测量,得出事故原因:差动保护装置没有CT断线告警功能,对主变中压侧C相开路没有提前告警。针对该事故的特点提出:重视继电保护的定检工作,严格按照规程定期检验;间隔固定时间对CT二次回路进行紧固;差动保护装置增加CT断线告警功能。
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| 关 键 词： | 变电站 差动保护 断线 分析处理 |
Analysis and Treatment of One Main Transformer Differential Protection Action Caused by CT Broken |
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| Li Minxia,Yuan Wenjia,Ji Xijun. Analysis and Treatment of One Main Transformer Differential Protection Action Caused by CT Broken[J]. Power Science and Engineering, 2009, 25(7): 52-53 |
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| Authors: | Li Minxia Yuan Wenjia Ji Xijun |
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| Affiliation: | 1.Xuchang Power Supply Company;Xuchang 461000;China;2.XJ Electric Co.;Ltd.;China |
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| Abstract: | The tripping accident was presented in one 110kV transformer differential protection.Through on-site protection characteristic test,insulation inspection and secondary circuit current voltage measurement,the cause of the accident was analyzed:differential protection device had no CT disconnection alarm function and there was no alarm the main change in the pressure-side C-phase open circuit there is no advance.Finally,aiming at the incident,preventive measures were concluded that making much of relay protec... |
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| Keywords: | substation differential protection disconnected |
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