Simplified implementation of 3L-SVPWM algorithm and neutral-point balancing

• Published in: Energy reports Vol. 8; pp. 453 - 460
• Main Authors: Wang, Zhenshang, Fu, Peng, Huang, Liansheng, Chen, Xiaojiao, Zhou, Hanbin, Zhang, Xiuqing, He, Shiying
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.08.2022; Elsevier
• Subjects: Neutral-point balancing; Simplified implementation; SVPWM; Three-level; Neutral-point balancing; SVPWM; Three-level; Simplified implementation
• ISSN: 2352-4847; 2352-4847
• DOI: 10.1016/j.egyr.2022.02.185

The traditional implementation method of the three-level space vector pulse width modulation (3L-SVPWM) needs multiple region judgment and a lot of trigonometric function operation, which has a large amount of calculation and increases the burden of the microprocessor. Therefore, a simplified implementation method of the 3L-SVPWM algorithm is suggested to reduce the complexity and avoid trigonometric function calculation. The method is simply completed by comparing and doing some addition and subtraction operations on the abc-axis coordinates of the reference vector. And the neutral-point balancing is achieved by directly changing the action time of the three-phase bridge arms. Hence, the complexity of the implementation of the 3L-SVPWM algorithm is remarkably reduced. Finally, the correctness of the simplified implementation method is verified by simulation experiments.