Research on Pulsed Power Decoupling Topology and Its Control Strategy Using Dual-Inductance Active Capacitor Unit

The input power of the pulsed power supply system (PPS) is required to be constant, and its output power is pulsed. To balance the instantaneous power difference, the single-inductance active capacitor unit (ACU) is often connected in parallel to the output of the PPS. However, the single-inductance ACU has a transient process of the current reverse of the inductor, which will lead to serious output current spikes of the pre-stage power supply system. In this paper, the dual-inductance ACU is adopted in place of the single-inductance ACU to suppress the transient process of inductor current reversal. In order to improve the dynamic performance and reduce the tracking error of the compensation current of the dual-inductance ACU, a nonlinear feedforward PID control strategy is proposed. Finally, an experimental prototype is built to verify the validity of the proposed pulsed power decoupling topology and its control strategy.