Commissioning practice of no - load stability in low head area for pump turbine

Connect to grid stably is very important for large capacity pumped-storage power station in low head. But it is also difficult because of different units' characteristic and start ruler. So, it is necessary to find some good ways to deal with it during commissioning period of power station. This paper is based on the stability commissioning practice of a pumped-storage power station with no-load, verifies the feasibility of pump turbine that try to adjust the speed of opening the guide vanes can connect to grid stably in generating condition. This is a successful example to solve the problem that how to connect to grid stably.