Current control design with a fractional-order PID for a three-level inverter

In this paper, a fractional-order proportional-integral-derivative (FOPID) controller is investigated for a three-level inverter called Multi-Neutral Point (MNP). For the first time, an FOPID is applied to multilevel inverters. Our main objectives are to remove the amplitude error, the phase shift error and decreasing the total harmonic distortion of the current.