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There has been growing interest in integrating hydrogen storage into powergrids with high renewable penetration levels. The economic benefits and powergrid reliability are both essential for hydrogen storage integration. In thispaper, an annual scheduling model (ASM) for energy hubs (EH) coupled powergrids is proposed to investigate the annual benefits of seasonal hydrogenstorage (SHS). Each energy hub consists of hydrogen storage, electrolyzers, andfuel cells. The electrical and hydrogen energy can be exchanged on the bus withthe energy hub. The physical constraints for both grids and EHs are enforced inASM. The proposed ASM considers the intra-season daily operation of the EHcoupled grids. Four typical daily profiles are used in ASM to represent thegrid conditions in four seasons, which reduces the computational burden.Besides, both the intra-season and cross-season hydrogen exchange and storageare modeled in the ASM. Hence, the utilization of hydrogen storage is optimizedon a year-round level. Numerical simulations are conducted on the IEEE 24-bussystem. The simulation results indicate that seasonal hydrogen storage caneffectively save the annual operation cost and reduce renewable curtailments.

Annual Benefit Analysis of Integrating the Seasonal Hydrogen Storage into the Renewable Power Grids