Repetitive control for a four leg matrix converter

The technology of direct AC/AC power conversion (Matrix converters) is gaining increasing interest in the scientific community, particularly for aerospace applications. In this paper a repetitive control system is proposed to regulate the output voltage of a four-leg matrix converter for a power supply application. The target application is a Ground Power Supply unit (GPU) for aircraft servicing where a filtered, stable output voltage is required. The proposed control structure reduces the tracking error between the output and reference as well as increasing the stability of the converter under balanced and unbalanced load conditions. SABER and MATLAB simulations have been used to verify the operation of the proposed control strategy.