Research on Control Method of Two-Port Flexible Interconnection Device Based on Flexible Interconnection and Power Flow Regulation

The great changes in the source and load of the distribution network under the new power system make the interconnection of the station area more difficult. However, the topology and control strategy of the existing flexible interconnection device are more complicated, and the development cost is higher. The cost performance of the existing flexible interconnection device applied to the low-voltage distribution network is not high. In view of the above problems, this paper proposes the topology of the two-port flexible interconnection device, constructs the equivalent circuit of the two-port flexible interconnection device in the distribution network scenario, and analyzes the flexible interconnection and power flow regulation of the two-port flexible interconnection device based on the equivalent circuit. The mathematical model of the two-port flexible interconnection device is established, and the control strategy of the flexible interconnection and power flow regulation of the two-port flexible interconnection device is proposed and verified by simulation analysis. The simulation results show that the two-port flexible interconnection device based on the proposed topology and control strategy can effectively compensate the pressure difference of the interconnection nodes in the station area, and can control the power flow and realize the interconnection and mutual assistance between the distribution networks.