Distributed collaborative control strategy for integrated energy microgrid based on multi-agent system

Abstract

Economic dispatch problem (EDP) in integrated energy microgrid is a basic optimization problem of power system. With the abundance of various forms of energy in the micro grid, this paper proposes a distributed cooperative algorithm based on the consistency framework to solve the EDP of the comprehensive energy economy model. This method makes use of the principle that under the optimal output power value, all micro sources can achieve the economic optimum with the same rate of cost increment. Therefore, the cost slight increase rate of each micro source is selected as the consistency variable, and the local power supply and demand mismatch value is taken as the feedback variable to meet the constraint conditions. Using multi-parameter perturbation theory and graph theory, the convergence of the algorithm is proved. The algorithm is a completely distributed algorithm with no leader or virtual command node. Simulation results show the effectiveness of this algorithm. At the same time, the simulation results directly illustrate the variation law of convergence speed.