Research on Hybrid Energy Storage Allocation Methods for Microgrids with a High Percentage of Renewable Energy Sources

In order to promote the consumption of wind power and photovoltaic (PV) energy in microgrids with a high proportion of renewable energy, energy storage systems are typically configured. However, a single type of energy storage technology cannot meet the requirements of high renewable energy access. Therefore, it is proposed to configure diversified energy storage devices in microgrids with a high percentage of wind and PV access. This approach aims to improve the operating life of storage devices and reduce costs while promoting the consumption of renewable energy. Firstly, the structure of the hybrid energy storage system in microgrids with a high proportion of renewable energy is analyzed, and a framework for the cooperative operation of hybrid energy storage based on hydrogen energy storage and battery storage is established. Secondly, a model for the optimal allocation of hybrid energy storage, aiming to minimize the comprehensive cost, is developed, with constraints derived from the characteristics of hybrid energy storage and the overall system operation. Finally, the effectiveness of the proposed methodology is verified through a numerical example.