Optimization of Multi-energy Microgrids with Waste Process Capacity for Electricity-hydrogen Charging Services

The highway service area, with facilities for electricity-hydrogen charging, includes multi-energy load energy demands and domestic waste process demands. Based on these needs, a fully renewable energy based multi-energy microgrid with electricity-hydrogen charging services and waste process capacity is proposed. This paper studies the energy input and output characteristics of multi-energy conversion and storage devices, and establishes the model for electricity-hydrogen charging microgrid (EH-CMG). The multi-energy conversion, storage characteristics and multi-energy flow coordination in the EH-CMG are then studied. An optimization model and its algorithm solution, based on constraints such as the charging time of vehicles, the reliability of multi-energy load energy supply and the available grid regulation performance in the EH-CMG, are established. The proposed optimization of EH-CMG is illustrated with the actual multi-energy operation data of a highway service area in northwest China. The results demonstrate that the proposed EH-CMG and its optimization method can achieve economic benefits for a multi-energy system with the ability of waste process, electricity-hydrogen charging, and also provide better regulation characteristics for the power grid.