Predictive current control with modification of instantaneous reactive power minimization for direct matrix converter

Unity power factor is one of the most important agents in controlling the matrix converter. The application of predictive current control to improve the power factor is the main contribution of this paper. Also reduction of input current harmonics is another advantage of proposed technique. In this paper, Modification of Instantaneous Input Reactive Power Minimization Scheme (MIRPMS) for a direct matrix converter is proposed. Normally, a discrete-time model of matrix converter, input filter, and load parameters are used to predict the behavior of the input reactive power on the supply side and the output currents for each valid switching state. In this algorithm, input current equations which is used to predict the input current at next step is modified. This leads the selection of optimal cost functions with fewer errors. Theoretical analysis and simulation results are provided in order to validate the proposed control scheme.