Comparison of predictive control strategies for direct resonant High Voltage DC power supply

This paper presents a comparison between two predictive control strategies for a HVDC power supply based on a direct resonant power converter: Input Predictive Control (IPC) and Output Predictive Control (OPC). IPC regulates the input filter capacitor voltage and OPC, the tank capacitor voltage. The resonant converter corresponds to a three phase to single phase matrix converter which feeds a resonant tank (SRPL). Both predictive strategies allow soft commutations, thus, minimizing the switching losses. Previous work has analysed the effects of the control choice on an AC voltage power supply only. The main contribution of this paper is the consideration of the effect of the control choice on the input current as well HVDC quality produced by the power supply.