This study proposes a space vector modulation (SVM) strategy to balance the neutral-point voltage of three-level inverter systems.
The proposed method is implemented by combining conventional symmetric SVM with nearest three-vector (NTV) modulation. The
conventional SVM is converted to NTV modulation by properly adding or subtracting a minimum gate-on time. In addition, using
this method, the switching frequency is reduced and a decrease of switching loss would be yielded. The neutral-point voltage is
balanced by the proposed SVM strategy without additional hardware or complex calculations. Simulation and experimental results
are shown to verify the validity and feasibility of the proposed SVM strategy.
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