High performance voltage regulation of current source inverters

Current source inverters offer advantages of voltage boost, short circuit protection, reduced EMI and direct regeneration. While CSI control strategies are less developed than for a VSI, the topologies are functional duals and have much in common in a control sense. In particular, since CSI voltage regulation is the dual of VSI current regulation, current regulation control strategies for a VSI can be readily implemented as equivalent voltage control strategies for a CSI. This paper shows how a high performance PI stationary frame and P+Resonant CSI voltage regulator can be analytically designed and optimised, while in particular taking into account the second order response of a CSI filter/load combination.