A Multilevel Inverter Optimization Based on New Two-level SVPWM Algorithm

Abstract

Multilevel inverter can withstand higher voltages by using multiple power devices. As the voltages increases levels is increased, the space vector density makes the output voltage synthesis closer to sine and makes the multilevel inverter developing rapidly. However, the traditional SVPWM control algorithm becomes more complex, and the operation speed is not ideal. In order to improve the algorithm speed, this paper optimizes the traditional SVPWM algorithm. By calculating the voltage difference of three-phase phase voltage, the sector where the reference voltage is located and the action time of the basic voltage vector are determined. The application of traditional SVPWM algorithm in multilevel inverter is simplified to achieve high computational efficiency. Simulation results show the effectiveness and feasibility of the proposed algorithm.