A Passivity-Based Control Strategy for Three-Phase Current Source Inverter Based on Interconnection and Damping Assignment

To reduce the limiting feature of switching frequency in the high power current source inverter (CSI) and minimize effects on CSI output performance, this paper proposes a interconnection and damping assignment passivity-based control (IDA-PBC) strategy for three-phase CSI. The lumped-parameter model of three-phase CSI with independent storage unit is established, moreover, its port-controlled Hamilton (PCH) model in Park reference frame is proposed. Based on solving the parametric partial differential equation of the interconnection and damping matrix, the design of the closed-loop system controller is studied in this paper, and the system stability is analyzed by Lyapunov function. Furthermore, simulation reports for three-phase CSI demonstrate the feasibility and efficiency of the introduced design, and show that the inverter has strong anti-interference ability to the load disturbance.