Modeling and Simulation of Three-Phase OHSW Multilevel Voltage-Source Inverter by Means of Switching Functions

Static power converters can be analyzed by several powerful computer simulation tools. In the case of complex circuits such as multilevel inverters, they are usually modeled as a set of switch. This modeling method results in convergence and long run-time problems. This paper proposes functional simulation model for the optimized harmonic stepped-waveform (OHSW) multilevel voltage-source inverter (VSI) which is based on the switching function concept. Using this method the memory and the simulation run-time minimized and the converter can be effectively modeled according to its function, rather than its topology.