Abstract:In order to alleviate the current crisis of fossil energy use, based on the consideration of cold storage, heat storage and electricity storage equipment, this paper constructed an economic model of RIES. Taking the sum of natural gas purchase cost, electricity purchase cost, and equipment operation cost as the objective function, the comprehensive operation cost of the system was more comprehensive. Constraints included not only the energy interaction loss of each equipment, but also the power and capacity constraints of energy storage equipment ,It also introduced backup of important loads, which improves the reliability of RIES power supply. The improved simulated annealing-particle swarm algorithm was used to solve the proposed model, which greatly accelerates the convergence speed of the solution algorithm. It is concluded that the solution algorithm proposed in this paper has faster solution speed, which further reduces the overall system operation cost.