Research on Enhancing the Capacity Credit of PV Considering Energy Storage

The correlation between source and load is a key impact on capacity credit of photovoltaic (PV). This paper proposes measures to improve the capacity credit of PV by energy storage systems. Firstly, the charge-discharge model of the BESS is established based on its operating characteristics and boundary limitations. Secondly, the wavelet packet decomposition method for optimal allocation of BESS is analyzed. Thirdly, the improvement degree of PV capacity credit under three different BESS control strategies is proposed. Finally, the proposed method is verified through the simulation analysis. Studying the improvement of energy storage on the capacity credit of PV can provide an important approach for the grid connection and consumption of PV power generation.