Research On Resident Load Regulation Strategy Based On Provincial-local Coordination

With the development of global energy interconnection,the connection of large scale power grids has become the main development trend of power system.The connection between provincial and local regulation and control systems has become closer.The network topology has become complex and diverse,which has brought considerable challenges to maintain the balance of power grid supply and demand.The power grid is in urgent need of a flexible resource for regulation and control to meet the operational needs.With the rapid development of smart grid technology,the residential load can already transmit information with the grid in both directions,which provides technical support for the residential load to participate in grid regulation.In order to fully exploit the regulable potential of residential load,this paper focuses on the aggregation of scattered residential load and studies the load regulation strategy based on provincial-local coordination.The main work of this paper is as follows:First,the factors affecting the working state of air conditioning,electric water heater and electric vehicle loads are analyzed.A load individual model is established on this basis and its load characteristics are analyzed to lay the foundation for the study of load participation in regulation of grid.Secondly,the aggregation model of the residential load is established in view of the large number of residential side loads,their scattered distribution and the impossibility of direct regulation,combined with the user’s usage habits.Depending on the way the load responds to the regulation command,the regulable potential of the aggregated load is analyzed and calculated.Then,a provincial-local load regulation architecture is constructed and a load regulation strategy oriented to provincial regulation instructions is proposed.The load regulation model with the lowest cost of electricity purchase for customers is established oriented to the grid peak regulation scenario and combining the time-sharing tariff information.Based on the characteristics of the Archimedes optimization algorithm and the Simulated Annealing algorithm,an Archimedes optimization algorithm fused with the Simulated Annealing algorithm is proposed,which improves the defects of the Archimedes algorithm that is easy fall into the local optimal solution easily.The algorithm is used to solve the model optimally,and the simulation verifies that the regulation strategy can improve the grid regulation capability by regulating load resources.Finally,the load regulation strategy based on provincial-local coordination for local-level regulation commands is proposed.Based on the load regulation structure of provincial-local coordination,the basis for judging the priority of provincial control commands and prefecturelevel control commands response is proposed.On this basis,this paper proposes the load regulation strategy for local-level regulation commands,and establish the load regulation model with the minimum network loss as the objective function,considering the transmission line blockage management scenario.Combining calculation examples for simulation,the results verify that the regulation strategy proposed in this paper can improve the line blockage and optimize the power flow of the entire network by rationally arranging the load power consumption.