Study of simplified SVPWM algorithm based on three-level inverter

Abstract

Presently, three-level inverter is one of the ways to achieve the high-capacity, high pressure motor, compared to the traditional two-level inverter, it has the advantage of sustaining high-voltage and low-voltage current rate of increase. A three-level inverter control algorithm is studied in this paper. Not only the three-level inverter topology and the operating mechanism are analyzed, but also the three-level inverter space vector pulse width modulation(SVPWM) conventional modulation strategy is studied, on the basis of the traditional three nearest vector (TNV) control algorithm, the control methods of three-level inverter based on improved algorithms SVPWM is proposed. By using this algorithm, the calculation process is simplified and the realization of simulation and control are facilitated. By using MATLAB/SIMULINK, a simulation model is built, the simulation results show feasibility of this strategy and excellent performance of this system, which will benefit for the research and improvement of the grid-connected photovoltaic inverter's control strategy.