Research on Collaborative Optimization of Integrated Energy System Considering Electricity, Heat and Gas Interconnection

The integrated energy system emphasizes the synergy between multiple energy sources compared with the traditional distributed energy subsystem. At present, the research on integrated energy systems is mostly the optimization research of single independent systems, which fails to give full play to the advantages of integrated energy systems. Since the mutual coupling between the electro-gas-thermal networks makes the multi-region integrated energy system optimization operation more complicated, the current research is still immature and needs further research. This paper firstly models the energy storage (storage, heat storage, gas storage) equipment and energy coupling equipment in the integrated energy system. Secondly, it establishes the objective function that considers the minimum system cost and establishes the power of the grid, and give the constraints of power balance equation and line loss equation of power grid, heat network and gas network; Finally, the simulation results show that after the grid, the heat network and the gas network are combined, the original distribution system is converted into a joint supply system through the grid, the heat network and the gas network, which improves the overall economy.