Optimal Sizing for Grid-connected Microgrid with Hydrogen Energy Storage Considering Ladder-type Carbon Trading and Source-load Interaction

Hydrogen energy storage system (HESS) has clean, efficient and cross-season energy storage characteristics, and has excellent potential under the background of low carbon. After detailing the volatility of wind speed, irradiance and load, this paper establish planning model to calculate system economy. First studying the relationship between the source-load output matching and operating conditions of HESS, which is complementary and it can be adjusted by wind-solar complementarity on the source side and demand response on the load side. Second, the ladder-type carbon trading mechanism is introduced into the planning model to reduce the carbon emission of microgrid. Finally,this paper provides a new hybrid optimization technology of chaotic search, particle swarm optimization and non-dominated sorting genetic algorithm2 to caculate the total annual cost. The calculation results show that the method proposed in this paper is reasonable and effective, which is able to provide some value for the application of hydrogen energy storage in power grid.