汽轮发电机定子绕组严密性失效故障及防治  

Failure and Prevention of Tightness Failure of Turbo Generator Stator Winding

作　　者：蒋晓炜 刘驰程 陈景荣 JIANG Xiaowei;LIU Chicheng;CHEN Jingrong(Hainan Nuclear Power Co.,Ltd.,Changjiang 572733,China;CNNC Nuclear Power Operations Management Co.,Ltd.,Haiyan 314300,China)

机构地区：[1]海南核电有限公司,海南昌江572733 [2]中核核电运行管理有限公司,浙江海盐314300

出　　处：《电工技术》2021年第12期67-68,71,共3页Electric Engineering

摘　　要：介绍了650 MW汽轮发电机定子绕组冷却水系统的构成,分析了发电机定子绕组正向严密性试验合格,但发电机整体气密性试验不能保压的原因。通过检查发现,发电机定子引出线汇流管法兰密封垫存在老化和加工不规范现象,进而引起发电机定子绕组冷却水系统出现“单向逆止阀”效应。在此基础上对发电机定子绕组冷却水系统严密性试验的策略进行了探讨。The composition of the cooling water system for the stator winding of a 650 MW turbo-generator is introduced.The reason why the generator stator winding is qualified in the forward tightness test,but the generator's overall air tightness test cannot maintain pressure is analyzed.Through inspection,it is found that the flange gasket of the generator stator lead-out line manifold has aging and irregular processing,which in turn causes the"one-way check valve"effect in the generator stator winding cooling water system.On this basis,the strategy of the tightness test of the generator stator winding cooling water system is discussed.

关 键 词：汽轮发电机 定子绕组 严密性 

分 类 号：TM62[电气工程—电力系统及自动化]