The Pump-turbine Hydraulic Performance Research, Model Test and Operation in Yangjiang Pumped Storage Power Station

The Yangjiang Pumped Storage Power Station (PSP) is the largest unit rated output PSP that has been built in China, with a maximum water head of nearly 700m and a unit capacity of 400MW. The ultra high water head and its large range of the PSP means a significant difficulty during the dydraulic research and development of the pump-turbine. In this paper, it is introduced on model test and results in the EPFL and IWHR. It is studied on energy performance, cavitation, pressure pulsation and “S” characteristic of pump-turbine with splitter blade. The unit data analys after put into operaton indicat highly hydraulic stability and relative tiny vibration, which just verify the model test. As the model and prototype results show that Yangjiang pump-turbine is outstanding in various indexes and quite excellent in comprehensive hydaulic performance.