DC-bus voltage regulation scheme for asymmetric cascade H-bridge converter working as STATCOM and active filter

This paper presents how through a suitable DC link regulation strategy, the asymmetric cascade H-bridge converter can perform STATCOM and active filter functions simultaneously. Initially DC link regulation strategy for a STATCOM function is developed, and then an adaptation of the strategy is presented in order to show the device works as an active filter. A two cells binary prototype is used to evaluate the control scheme performance through simulation and experimental results.