Predictive Current Control Operating at Fixed Swwitching Frequency in a Grid–Connected NPC Converter

This paper deals with a predictive current control at fixed switching frequency for a grid-connected neutral-point clamped voltage source converter. The method applies three voltage space vectors at every sampling period and the duty cycles are computed using the cost function. The current errors along with the voltage drift of the neutral-point are the control criteria, whereas the switching frequency is constant and defined by the sampling period. Simulations results validates this proposal showing quick response and good current tracking.