Topology structure and control strategy of flexible integrated devices suitable for interconnection of distribution network feeders

After the integration of new energy sources such as wind power and photovoltaics, as well as various flexible loads into the distribution network, higher requirements have been put forward for the flexible regulation of power flow in the distribution network. However, the topology structure of traditional flexible interconnection devices in distribution networks is complex, expensive, and difficult to promote and apply. Therefore, this paper proposes a topology of hybrid flexible interconnection device formed by parallel connection of power electronic power control unit and mechanical switch. The mathematical model of the topology is further constructed, and the control strategy of the device is designed. Finally, the ability of flexible interconnection of the device is verified by PSCAD/EMTDC simulation software.