秦山320 MW核电机组汽轮发电机空冷系统结露原因分析及处理

近年来,秦山320MW核电机组发电机空冷器频繁出现结露现象,空冷器结露温度的高低直接关系到发电机内空气湿度的大小,进而影响发电机内部绝缘,转子护环应力腐蚀等,给汽轮发电机安全运行带来极大的隐患。针对发电机空冷器结露,文章对其产生的原因和可能造成的危害进行了分析,并通过与机组实际运行情况结合,发现增强空冷系统密封性或降低冷却水流量等方法能有效防止空冷器结露现象。

In recent years,the air coolers of Qinshan 320 MW nuclear power generator frequently appear condensation phenomenon.The condensation temperature of the air coolers is directly related to the size of the air humidity in the generator,which affects the internal insulation of the generator and the stress corrosion of the rotor guard ring,etc.,which brings great hidden danger to the safe operation of the turbine generator.In view of the air cooler condensation of generator,this paper analyzes its causes and possible hazards,and by combining with the actual operation of the unit,this paper finds that the air cooler condensation can be effectively prevented by enhancing the airtightness of the air cooling system or reducing the cooling water flow rate.