Capacity Coordinated Optimization of Battery, Thermal and Hydrogen Storage System for Multi-Energy Complementary Power System

For a multi-energy complementary power system containing wind power, photovoltaic, concentrating solar power and electric/thermal/hydrogen multi-type energy storage, the coordinated and optimal allocation of the capacity of various types of energy storage devices is important to improve the system operation economy and cleanliness. A coordinated and optimal allocation method of electric/thermal/hydrogen energy storage capacity for multi-energy complementary power system based on time-series production simulation is proposed. An electric/thermal/hydrogen storage capacity optimization model is established with the objective of maximizing the system's combined annual value gain and considering the system energy outgoing, renewable energy utilization rate and the operating constraints of various power sources and storage systems. Finally, based on the idea of time-series production simulation, the optimal configuration capacity of electric/thermal/hydrogen energy storage that takes into account economic, safety and cleanliness constraints is obtained by optimal solution with the theoretical output of 8760h of scenery for the whole year as input. The example is validated based on a multi-energy complementary power system in northwest China, and the impact of system operation mode, operation strategy, cost and tariff on the capacity allocation results is quantified and analyzed to verify the effectiveness of the method.