A detailed pumped storage station model for power system analysis

Abstract

In the pumped storage stations, the operating point of reversible pump turbine and the water flow direction in conduit system often change. There is no detailed pumped storage station model in present commercial power system simulation software. The ideal hydro turbine model can only be applied under the generating operating condition, but can't be applied under the pumped operating condition, the conversion of operating condition, large disturbance simulation, and so on. In this paper, a new detailed pumped storage station model is established by the PSS/E user-written model: The reversible pump turbine is represented by the improved SUTER transform characteristics model, which is based on the four-quadrant operating characteristics. And the conduit system is represented by the versatile model. Based on the PSS/E power system models, the generating operating condition, the pumped operating condition, the conversion of operating condition and large disturbance can all be simulated. The application of this model to the test systems is carried out and the results show that the pumped storage station model is valid