Generation adequacy assessment for power systems with wind turbine and energy storage

Wind power has been considered as an environmental friendly electrical generation resource; however, the high wind power penetration can lead to high-risk levels in power system reliability. Energy storage system (ESS) is a promising means to smooth variations of wind power and improve the system reliability. Simulation models for assessing generation adequacies of power systems with wind power generation system (WPGS) and ESS are presented in this paper. The impacts of different wind power penetration levels on the reliability benefits from ESS are analyzed in the first case-study, when the WPGS is utilized to replace the conventional generators with same total rated power capacity. In the second case-study, the WPGS and ESS are installed to meet the annual growth of load demand and maintain the generation adequacy levels. The Monte Carlo simulation is used to simulate the operation of generating units and ESS, considering the force outage rates (FOR) of generators and random fluctuations of wind speeds.