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2026-08-05
Coordinated Control of Common Mode Voltage Suppression and Neutral Point Voltage Balance for NPC Three-Level Inverters
By
Progress In Electromagnetics Research C, Vol. 172, 183-194, 2026
Abstract
To address high common-mode voltage (CMV) and neutral-point voltage (NPV) imbalance issues in practical neutral-point-clamped (NPC) three-level inverters, a logic virtual space vector pulse width modulation (LVSVPWM) strategy is proposed. Based on the conventional virtual space vector pulse width modulation (VSVPWM), the proposed method first eliminates vectors with large CMV and redivides small sectors to reduce sector switching, limiting the CMV to ±Vdc/6. Second, it uses a logical judgment for the initial variable duty-cycle distribution to reduce the number of switching actions. Then, it redistributes the duty cycles according to NPV balancing requirements to achieve NPV balance. Finally, experiments validate the accuracy and effectiveness of the proposed strategy.
Citation
Dingdou Wen, Zijie Yan, Dengliang Xia, Li Yang, and Yuanyuan Xiao, "Coordinated Control of Common Mode Voltage Suppression and Neutral Point Voltage Balance for NPC Three-Level Inverters," Progress In Electromagnetics Research C, Vol. 172, 183-194, 2026.
doi:10.2528/PIERC26060201
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