Three-Phase Parallel Active Power Filter with Direct Current Control

The paper presents an application of direct current control (DCC) method in a three-phase parallel active power filter. The power filter is employed to compensate fundamental reactive power and harmonic distortion of non-linear loads and due to its inverter-like topology with known parameters in filter branch, the predictive DCC method was implemented to reduce the filter's commutation frequency. Consequently, the filter branch losses are decreased. Experimental setup based on a TMS320F2407A DSP was used to confirm the theoretical expectations.