Predictive Current Control with Vector Selection of a Voltage Source Inverter

This paper analyzes the vector selection in the predictive current control scheme of a Voltage Source Inverter (VSI) with a Resistor – Inductive load (RL load). Three vector selection ways are considered based on information about the increase and decrease of the load current in the next predictive step. Afterward, the selected vectors will be used in the predictive model. The original predictive current control scheme uses seven vectors of the VSI for the calculation of the predictive model. The vector selection reduces the number of vectors used in the predictive model and also reduces the computational burden of the cost function optimization problem. All three ways are simulated with Matlab/Simulink and compared with the original predictive current control scheme. In every sampling time, a vector can be selected based on predictive current information, but the quality of the load currents can become poor. However, suppose the number of vectors in the vector selection way is three. In this case, the quality of the load currents of this method is equivalent to the quality of the load currents of the original predictive current control scheme.