A Virtual Power Plant Theory Based Multi-Objective Coordinated Optimal Dispatch With Peak Load Regulation at Both Supply Side and Demand Side

Along with the grid-connection of large-scale new energy resources and that of various flexible loads at demand side, the secure and stable operation of power system is undergoing the ordeal of dual uncertainty of power sources and power loads. To implement the optimal dispatch of wide-area energy resources, the coordinated control of new energy resources and flexible resources is necessary. Based on the theory of virtual power plant, the flexible resources at the demand side, such as the energy storage systems, electric vehicles, flexible loads, the distributed new energy resources and so on, are integrated in the manner of virtual power plant, then the integrated loads at demand side are dispatched by the power grid with energy resources at power supply side. Based on the peak load regulation index of power grid, the operational cost of power grid, the compensating cost of the customer, a multi-objective optimal model, which can perform coordinated peak load regulation at both supply side and demand side is established to fully exert the peak load regulation capability at both supply and demand sides, to implement reliable absorption of new energy resources. The effectiveness of the proposed model is verified by simulation results.