ENHANCED MODEL PREDICTIVE CURRENT CONTROL FOR ELIMINATING ZERO-SEQUENCE VOLTAGE AND REDUCING CURRENT HARMONICS IN NINE-SWITCH INVERTER FED OPEN-END LOADS

Abstract

This paper presents an enhanced model predictive current control (MPCC) strategy designed to eliminate zero-sequence voltage (ZSV) and reduce current harmonics in nine-switch inverter (NSI) systems driving open-end loads. The proposed approach begins by formulating a control set comprising seven voltage vectors that inherently produce zero ZSV, ensuring effective ZSV elimination. Within each sample period, three of these voltage vectors are ideally used to further improve output current performance. Simulations utilizing PSIM software are used to verify the effectiveness of the proposed method.