Optimal Operation Strategy of Energy Storage System Considering Wind Uncertainty and Power Market

Considering the uncertainty of wind power output and the market price of electric energy and frequency modulation auxiliary services, a model is established. The established model adopts a two-stage collaborative operation optimization method. The first stage aims to maximize wind power consumption and lowest cost, and the second stage aims to maximize the profitability of idle energy storage system under the energy market and frequency regulation market. The proposed strategy is obtained through the analysis of the calculation example. The energy storage system not only reduces the fluctuation of new energy and improves the dispatchability and absorption capacity of wind power, but also can increase the operating income in the environment of the energy market and ancillary service. Especially when the price of frequency regulation market is high, it has good economic benefits and reduces the cost recovery period of investment in the energy storage system.