The global energy transition is driving the adoption of renewable energy sources like wind and solar power in distribution networks. Integrated Energy Systems (IES) play a crucial role in promoting renewable energy development and optimizing energy utilization efficiency. Energy Storage Systems (ESS), particularly hydrogen storage through power-to-hydrogen (P2H) technology, offer high energy density and cost-effective storage of surplus renewable energy. Utilizing renewable electricity can reduce hydrogen production costs and ensure zero-carbon emissions. The shared energy storage (SES) model integrates energy storage with a shared economy concept, enhancing economic benefits for both users and operators. Collaborative optimization of microgrid clusters with shared energy storage can improve operational efficiency and reduce costs through economic dispatch, benefitting all stakeholders in the energy sector.