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Research on Neutral-point Balancing Control for Three-level NPC Inverter Based on Correlation between Carrier-based PWM and SVPWM

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4 Author(s)
Wenxiang Song ; Shanghai Key Laboratory of Power Station Automation Technology, Shanghai University, Shanghai, P.R. China, 200072 ; Guocheng Chen ; Xiaoyu Ding ; Mantang Shu

Based on inherent correlation between the carrier-based PWM and SVPWM for three-level inverter, this paper presents a new modulation approach for the control of the neutral-point voltage variation in the three-level neutral-point-clamped voltage source inverter. The new modulation approach realizes the control of inverter neutral-point current by modifying redundant small vectors pairs distribution factor, only requiring the information of dc-link capacitor voltages and three-phase load currents, which is convenient to apply and is compatible of digital computer realization. The effectiveness of proposed control approach is verified by simulation and experiment results

Published in:

Power Electronics and Motion Control Conference, 2006. IPEMC 2006. CES/IEEE 5th International  (Volume:3 )

Date of Conference:

14-16 Aug. 2006