Abstract
In this paper, an analytical study of three-phase matrix converter behaviour under unbalanced and/or distorted operating conditions is presented. Because of the lack of any considerable storage device, matrix converter operations are significantly influenced by distorted conditions. Even if adequate control strategies are able to ensure a sinusoidal balanced output voltage, under input voltage and/or output load distortion or unbalance, unwanted harmonics are generated in the input currents. The analytical results proposed in this paper make it possible to predict both the frequencies and amplitude of the harmonic components in the input current once the input voltage and output current disturbances, expressed in terms of the frequency spectrum, are known. The proposed analysis is formalized using the space-vector concept, allowing a precise and general approach, which can be applied to any operating condition. Numerical and analytical results have been found and compared with the ones discussed by other authors and confirm the proposed approach.
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