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| 摘要: |
| 针对启动1号给水泵时，1号发电机－变压器组差动保护有时会误动的情况，经过分析和计算 ，确认1号高压厂用变压器高压侧电流互感器C相二次出线IC441与ICN441接反，是造成差动保护误动的直接原因，经验证无误无，恢复了IC441与ICN441的正确接线，消除了主设备的主保护长期遗留下的事故隐患。 |
| 关键词: 给水泵 机组 误跳闸 故障分析 火力发电厂 |
| DOI： |
| 分类号:TM621.7 |
| 基金项目: |
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| Analysis of unit protection misoperation when starting feed water pump |
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LAI Wei-feng
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| Abstract: |
| When start up No.1feed water pump ,the differential relay protection of No.1generator-trans-former set may happen misoperation.By analysis and calculation,it is confirmed that the secondary out puts I C441 and I CN441 on phase C of the current transformer at high voltage side of No.1high voltage transformer are reversedly connected.After in spection and verification,the mistake is corrected. |
| Key words: differential relay protection,fault analy sis,prevention strategy, |
