Joint optimal operation of wind farms and pumped storage power station

Being renewable and environment-friendly, wind power generation has a promising future. However, its disadvantages in randomicity, intermittence and volatility will put stress on peak regulation and frequency modulation of power grid. A good way to solve the problem is applying energy storage technology into wind power generation. An economic dispatch model for day-ahead generation scheduling is built in this paper. Wind farms, pumped-storage and regular thermal power plants are included in this model, which also considers the inaccuracy of wind power forecast and load forecast, restriction in reliability of power grid, and operational features of pumped-storage station. Moreover, the piecewise linearization method has been used to simplify the model and make it more appropriate to lager systems. Data from Inner Mongolia are used in computer simulation. Simulating results show that pumped-storage station could be important in increasing stability, reliability and economic efficiency of power system.