Design of an algorithm for controlling the multilevel three-phase converter

The task of power inverting is currently being solved primarily by so-called static converters, the most efficient among them in terms of efficiency and mass dimensions are semiconductor transistor converters. To obtain a three-phase system with a multilevel transformation, it is necessary to develop a correct control of the operation of transistors of each level, where the state of each element is very important at a certain moment of time. Therefore, an actual problem for a multilevel converter is to develop a control algorithm, taking into account the state of each transistor in levels.
The control algorithm is designed for a three-phase multistage system for converting a DC voltage to an AC voltage. It is assembled from a solar module that consists of m and n solar cells connected in series or in parallel to each other, divided into three, four or five stages. Each voltage stage is fed to the inverter, and the inverter, in turn, identifies certain groups of DC voltage sources alternately to a three-phase load, forming a voltage almost close to the sinusoidal form.

Author: Kyrmyzy Taissariyeva
Conference: Title