Abstract
This paper proposes a space vector modulation based dc-link capacitor voltage balancing technique for a 5-level multiple-pole multilevel diode-clamped (M2DCI) inverter. The new 5-level inverter contains lesser number of clamping diodes compared to the conventional 5-level diode-clamped inverter (DCI) topology and does not require any extra balancing circuits to maintain balanced voltages across the four dc-link capacitors. The effect of load power factor and modulation indices on voltage balancing strategy has been studied, and the stability region for 5-level M2DCI is determined based on investigation done in the Matlab/Simulink® and PSIM environment during balanced, unbalanced and distorted load conditions.
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