白盆珠电站增容改造后出力不足问题的解决

Solution of Output Undercapacity after Rehabilitation of Baipenzhu Power Station

白盆珠电站增容改造后,当导叶达到75%最大开度以后,随着开度的增加,机组效率下降,机组出力增加缓慢,达不到电站增容改造要求。本文通过理论分析指出造成这种现象的原因在于大开度工况时导叶端面出现脱流引起效率下降,并采用针对性手段解决了该问题,使机组出力得到了保证,达到了增容改造的目的。

After rehabilitation of Baipenzhu power station,the output power of the project can＇t reach the expectation because the efficiency of the unit decrease rapidly after the guide vane opening is over 75% of maximum opening.This paper points out that the cause of the phenomena is the separate flow at guide vane below surface at large guide vane opening,and gives applicable way to solve the problem.