The pumped-storage generating unit pumps water at low load of power grid to decrease the loss of thermal generators, and modulate the load at the peak load of power grid.

• 摘要抽水蓄能机组在电网低谷负荷时作抽水负荷，降低火电机组的压火损耗；电网高峰负荷时顶替火电机组出力调峰。