An Autonomous Optimization Dispatch for Multi-Energy Microgrid Considering Hydrogen Production

The phenomenon of wind and solar curtailment is quite severe in microgrid with high renewable generation connection. Constructing renewable energy-hydrogen combined system can be an effectively way to reduce the wind and solar waste and to meet the growing requirement of hydrogen energy. However, renewable energy-hydrogen combined microgrid faces problem as low electric grid self-service capability caused by high operation cost and low capacity of the traditional battery energy storage system. Therefore, a hydrogen production based multi-source multi-energy microgrid has been proposed in this paper. The system includes PV cells, wind turbines, heat boiler, electrical energy storage system, thermal energy storage system, hydrogen electrolyzer and hydrogen fuel cell and works at off-grid mode. An autonomous optimization dispatch system is then developed to minimize operating costs and provide optimized output power for each unit, ensuring stable operation in island mode. The simulation result proves that the system can take fully usage of the renewable energy and possess good economic efficiency by hydrogen trading.