某电厂2号机组非全相保护动作原因分析 

杨红 
(重庆水利电力职业技术学院，重庆 402160) 
 

摘 要： 针对某电厂2 号发电机组C 级检修后，由于非全相保护误动而造成机组无法顺利并网事件，介绍了事件发生经过及事故检查处理的过程，分析了该事件发生的可能原因，提出了改进并网开关合闸控制回路设计，加强并网开关分合闸同期性检查及液压操动机构油回路畅通检查，补充规范并网开关传动试验管理细则等防止类似事故发生的预防措施，为发电机组运行检修工作提供了借鉴和参考。
关键词： 发电机组；非全相保护；并网；预防措施
中图分类号：TM762.2+5 文献标识码：B 文章编号：1007-3175(2014)05-0039-03

Analysis on Open-Phase Protection Action of Unit 2 in Certain Power Plant 

YANG Hong 
（Chongqing Water Resources and Electric Engineering College, Chongqing 402160, China） 
 

Abstract: Aiming at the event that after grade C overhaul of unit 2, the units was unable to connect to the grid because of the open phase protection misoperation, this paper introduced the taking place process and trouble shooting process of the event, analyzed the possible cause of the event and raised the making control circuit design of improving the grid connection switches, strengthening the corresponding period checking of the grid connection switches making and breaking and the unblocked examination of hydraulic operating mechanism oil circuits and supplying the regulation of the grid connection switches transmission test management details etc measures to prevent similar accident from taking place.
       Key words: generator set; open-phase protection; grid connection; precautionary measures

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