中压直流配电系统等效降阶建模及控制参数设计

An appropriate equivalent reduced-order model can provide convenience for the stability analysis and control parameter design of MVDC(Medium-Voltage DC) distribution system. Firstly, based on the proposed open-loop and closed-loop equivalent reduced-order modeling procedure, an equivalent reduced-order circuit model of MVDC distribution system is established, and the open-loop equivalent reduced-order model considering the dynamic interaction between converters is established. Without increasing the order of the reduced-order model, a state feedback control method based on Taylor expansion is introduced, which creates favorable conditions for the accurate design of system oscillation frequency and damping factor. Then, based on the closed-loop equivalent reduced-order model considering the dynamic interaction between converters, combined with the proposed control parameter design method of MVDC distribution system, the system oscillation frequency and damping factor are accurately designed. Finally, the hardware-in-the-loop experimental results verify the rationality of theoretical analysis.