摘要：In this work, a new input current modulationtechnique is presented for the matrix converter (MC) workingin the conditions of unbalanced supply. The proposed techniqueimproves the quality of the supply currents when the outputperformance of the MC is improved by considering the actualsupply voltage characteristics in the SVM technique. Whilethe balanced output voltages are produced by SVM techniqueunder unbalanced supply voltage condition, the MC inputperformance is degraded due to the injection of harmonics withthe low frequencies in the supply currents. In this condition,the supply current quality is upgraded by modifying the inputmodulation vector based on the positive/negative sequencecomponents of the supply voltages. The approaches adopted bythe existing input current modulation techniques to decomposethe positive/negative sequence components are complex andrequire large storage space. This drawback is overcome inthe presented technique by using the instantaneous powertheory to derive the input current modulation vector basedon the positive sequence components of the supply voltages.The presented technique of deriving input modulation vectordoes not require the complex and memory consuming sequencedecomposition methods and therefore can be realized easily ascompared to existing input modulation techniques of the MC.The effectuality of the new technique is confirmed by the resultsof simulation performed in PSIM software and real time resultsin OPAL-RT. Comparison of the presented technique is carriedout with two other techniques to show the effectiveness.
关键词：Harmonics; input current modulation; matrix converter; space vector modulation; THD
