Title :
Research on Neutral-point Balancing Control for Three-level NPC Inverter Based on Correlation between Carrier-based PWM and SVPWM
Author :
Song, Wenxiang ; Chen, Guocheng ; Ding, Xiaoyu ; Shu, Mantang
Author_Institution :
Shanghai Key Lab. of Power Station Autom. Technol., Shanghai Univ.
Abstract :
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
Keywords :
PWM invertors; electric current control; voltage control; carrier-based SVPWM; correlation method; current control; modulation approach; neutral-point balancing control; three-level NPC inverter; voltage control; Automatic voltage control; Automation; Capacitors; Computational modeling; Laboratories; Power generation; Pulse width modulation inverters; Space vector pulse width modulation; Switches; Voltage control; SVPWM; carrier-based PWM; neutral-point voltage control; neutral-point-clamped inverter;
Conference_Titel :
Power Electronics and Motion Control Conference, 2006. IPEMC 2006. CES/IEEE 5th International
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0448-7
DOI :
10.1109/IPEMC.2006.4778261
