<p>Three-phase three-level neutral point clamped inverters are widely used in new energy fields such as photovoltaic power generation and wind power generation by virtue of their multilevel topology. The traditional three-vector model predictive control can solve the problems of current harmonics and unfixed switching frequency that exist in the single-vector model predictive control, but the traditional three-vector model predictive control still has the problems of large computation and difficult design of weighting factors. Based on this, this paper proposes a three-vector model predictive current control without weighting factors. This method firstly selects the voltage vector by dividing sectors to eliminate the weight factor. Secondly, it adopts the principle of step-free control to obtain the reference voltage and the optimal sector. The action time of each vector is calculated through the cost function, and the switch sequence is designed. Finally, a phase angle compensator is introduced to reduce the error caused by delay. The experimental results show that this control strategy can quickly adjust the midpoint potential balance, and the current harmonic content is reduced to 3.5%.</p>