Simulation design of a multilevel MMC converter based on mathematical model of electronic components with NLM modulation algorithm

Abstract

This paper presents the design of mathematical models for the power and control circuits of the MMC multilevel converter. The research
focuses on describing all electronic components of the MMC multilevel converter using mathematical formulas that accurately reflect the
physical nature and functions of these components. As a result, the MMC multilevel converter can be represented in the form of a mathematical model. This facilitates the development of tools to verify control algorithms for MMC more conveniently, given that constructing experimental models and performing HIL simulations of the MMC multilevel converter is challenging due to the large number of converter modules, which exceeds the capacity of HIL simulation deFvices. The process of formulating mathematical models for the electronic components,
the entire power circuit, and the control circuit is carried out and simulated using LabVIEW software, applying the NLM modulation algorithm to generate N+1 voltage levels (where N is the number of submodules in each branch of the MMC). The results are then compared with
those from an MMC model simulated in MATLAB software under the same simulation conditions and technical parameters to verify the
operation of the MMC converter