Hierarchical coordinated control of DC multi-port power electronic equipment

Abstract

With the rapid development of solar energy and other new energy, multi-port power electronic equipment as a new integrated device meets the requirements of complex and diversified DG(DG). In order to ensure the stable operation of multi-port power electronic equipment, this paper aims to balance the internal power of multi-port power electronic equipment and maintain the stability of the DC bus voltage. A coordinated control strategy with master-slave control in hierarchical control is proposed. The local control layer and the central control layer coordinate and cooperate to maintain the power balance within the equipment, thus improving the running stability of the multi-port power electronic equipment. Finally, the effectiveness of the proposed hierarchical coordination control strategy is verified by MATLAB simulation.