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在以火电、核电为主要电能的日本，抽水蓄能电站担负着调整电网峰荷的任务，迄今已经建造了40多座这样的电站． 抽水蓄能电站扬程提高，水库及水泵水轮机就可以实现小型化，对环境的影响也会减小，也就更加经济． 因此，水泵水轮机的发展遵循着高扬程、大容量化这一方向，目前已经跨越了始于20世纪70年代的500 m－300 MW级的时代，迈入了700 m－400 MW级的时代． 作为超高扬程大容量水泵水轮机的葛野川电站1号水泵水轮机，自1999年12月投入运行以来，从未出现过故障停机，非常稳定地连续运行至今． 在此，介绍日立公司研制的水泵水轮机，其可靠性高，具有优越的水力性能及运行特性．
In Japan, where thermal power and nuclear power are the main power sources, the pumped storage power station has the task of adjusting the peak load of the power grid. So far, more than 40 such power stations have been built. Pumped storage power station lift, reservoirs and pump turbines can be miniaturized, the impact on the environment will be reduced, it is more economical. Therefore, the development of pump-turbine follows the direction of high-lift and high-capacity. It has now surpassed the age of 500 m-300 MW from the 1970s to the 700 m-400 MW. As the No. 1 pump turbine of Geyechuan Power Station, an ultrahigh-lift, large-capacity pump turbine, it has been operating continuously in operation since it was put into operation in December 1999. Here, introducing the pump turbine developed by Hitachi, its high reliability, with superior hydraulic performance and operating characteristics.