Modeling and Equivalence of Integrated Power Generation System of Wind, Photovoltaic and Energy Storage

In order to improve generation performance of wind and solar power, the integrated power generation of wind, photovoltaic (PV) and energy storage is a focus in the study. In this paper, the integrated generation electromechanical model of wind-farm, PV station and energy storage station is achieved so as to establish the foundation of its connected-grid simulation and analysis. First, the models at unit level of doubly-fed wind generator, photovoltaic (PV) and energy storage unit are constructed by their own operational characteristic. Then, their substation level models are constructed by equivalent method. So the integrated generation electromechanical model of wind-farm, PV station and energy storage station is achieved by indirect composition method and programmed in PSD-BPA software. The simulation result for a small sample system and Zhangbei wind, solar and energy storage demonstration station verifies the model's validation. It will provide an effective analysis tool for grid-connection of integrated power generation.