A Coordinated Dispatching Model for HDR-PV Hybrid Power System: A Zero-Sum Game Approach

Abstract

With the increasing proportion of large-scale photovoltaic (PV) plants in Qinghai’s power grid, the energy storage system has become the key to the power grid’s reliable operation. However, due to the environmental adaptability of electrochemical energy storage, it cannot meet the needs of the Qinghai power grid. This paper puts forward the technical route of using a hot dry rock (HDR) power system instead of traditional chemical energy storage systems to improve the power grid’s reliability. The hybrid power system consisted of an HDR generation and the PV plants are constructed, and its operating models are given. The zero-sum game method is used to establish the coordinated dispatching model of the hybrid power system. Finally, the proposed dispatching model is verified by an example with actual data of the HDR in the Gonghe basin. The results show that the HDR generation can effectively enhance the credible capacity of PV plants, thus reducing the influence of power fluctuation on the power grid.