Unit commitment considering reserve provision by wind generation and storage

Abstract

To deal with the uncertainty rising with high wind penetration, it is technically and economically important to consider reserve provision by wind generation (WG). Storage could mitigate the WG volatility, so reserve provision by combination of WG and storage could be more competitive in reserve market. This paper presents a new unit commitment (UC) model, in which both WG reserve opportunity cost and storage cost are introduced into the objective, and new WG and storage reserve decision variables are also employed. Four strategies to determine WG reserve capacity and four combination modes of reserve providers are discussed. The contributions of each strategy to reduce the wind uncertainty are estimated using a statistic method based on Latin Hypercube Sampling (LHS). The simulation results show that the strategies proposed could reduce the reserve capacity allocation of conventional units and suppress the WG fluctuation, while enhancing the overall economic performance.