Abstract
This paper is devoted to modeling of three-phase multilevel voltage source inverter (MLVSI) under the nearest vector selecting space vector control (SVC). Mathcad and LabVIEW controller models and some related results are described. “Instantaneous SVC” PSIM-model for simulation both control unit and power circuit (considering ideal power switches) of the seven-level cascaded MLVSI (CMLI) is presented and explored. Namely, the before obtained MLVSI output voltage waveform, its THD and integrated voltage harmonics factors (IHF) values as functions of the amplitude modulation index are verified. The MLVSI input currents, drawn from the elementary cells power supplies, are also considered. Their waveforms and spectrograms examples are shown, the dependences of their average values and their values of integrated ripple factor on amplitude modulation index are obtained.
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