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A new shunt active power filter based on indirect matrix converter

This paper proposes a new topology for active power filter (APF). In the proposed topology, the employment of an indirect matrix converter (IMC) as a part of shunt active filter has been investigated. Using the proposed IMC based APF, the dc link capacitor can be removed and also the average of dc link voltage can decrease in 1.5 times of the peak of source voltage. Furthermore, in this paper a new control method based on instantaneous power theory or P-Q theory and predictive current control for proposed APF is presented. In the proposed control method, there is no need to control the voltage of dc link and the average of voltage is always constant. Using PWM based control strategy, the injected harmonics will be produced around and more than switching frequency and the size of filters will be decreased. The simulation results obtained from PSCAD/EMTDC software confirm the validation of the proposed topology advantages and its control method.