马马崖一级水电站水轮机调节系统大波动过渡过程分析

摘要

The installed capacity of Mamaya Ⅰ hydropower station is 3 × 180 MW + 1 × 18 MW .Because the transient flow of water diversion and power generation system changes quickly ,large fluctuations occur in the hydroturbine regulat-ing system ,resulting in elevated rotating speed and volute pressure but decreased runner outlet pressure .All the changes affect the hydroturbine system and the station building drastically .According to the final construction drawings ,data of the hydroturbine system and speed regulating system , the process of large fluctuations was calculated and double-checked .Meanwhile the increasing values of the maximum volute pressure ,rotating speed and minimum runner outlet pressure were analyzed to study the conditions when these values occurred .This study will provide a theoretical basis for the start-up and subsequent operation .%马马崖一级水电站发电引水系统中的流量瞬间变化较大，致使水轮机调节系统产生大波动过程，从而引起机组转速升高、蜗壳压力升高、转轮出口压力降低，对于机组及过水建筑物影响很大。根据施工图纸、机组及调速系统资料，对水轮机调节系统大波动过渡过程进行复核计算，分析蜗壳最大压力升高值、机组转速最大升高值和转轮出口最低压力值的发生工况及其影响，为该水电站的启动调试和后期运行提供了依据。