Detailed Modelling and Control of a Modular Multilevel Converter with Full-Bridge Submodules in a Multi-Terminal High Voltage DC Network

Presently, there is a rising interest towards multiterminal high voltage direct current networks which use multilevel converters. Furthermore, even though full-bridge submodule topologies have some advantages over half-bridge, there is less research regarding simulation and control of multiterminal networks with such topology. The goal of this paper is to bring forward a detailed modelling method for modular multilevel converters, which use full-bridge submodules, in the context of multiterminal networks. Moreover, great attention is given to the process of converter controller tuning. The simulation and control method are demonstrated using Matlab/Simulink.