Economic dispatch of virtual power plant based on distributed primal-dual sub-gradient method

Virtual power plant (VPP) has been proposed to manage distributed energy resources (DERs). The consideration of power transmission constraints and each DER' constraint must be made while solving its economic dispatch problem. Compared with the traditional centralized dispatch, the distributed dispatch has the advantages of higher profits, stronger system robustness, etc. A model describing VPP's distributed economic dispatch is built in this paper and a distributed primal-dual sub-gradient method is adopted to deal with the model. Three simulating scenarios on a modified IEEE-34 bus VPP system are provided to verify the distributed strategy and results indicate that the method has quick convergence rate and strong stability.