Numerical iterative methods solving three-phase multilevel voltage converter

The main aim of this paper is to improve and further develop numerical iterative methods for calculating the optimum sequence of switching angles for the multilevel converter of direct to alternating voltage in the three-phase system. Advantages and disadvantages of numerical iterative methods and their application for finding a solution for multilevel converter with a higher number of DC sources are discussed. To solve the problem it is fundamental to choose the initial conditions suitably and deal with divergence of numerical iterative algorithms.