A Carrier-Based SVPWM Begins with the Zero Voltage Vector for Three-Level Neutral Point Clamped Converter

被引：0
|
作者：
Gao Z. [1 ,2 ]
Ge Q. [1 ]
Li Y. [1 ,2 ]
Zhao L. [1 ]
Zhang B. [1 ]
机构：
[1] Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing
[2] University of Chinese Academy of Sciences, Beijing
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2020年 / 35卷 / 10期
关键词：
Carrier-based PWM; Neutral point balance control; Space vector PWM; Three-level; Zero voltage vector;
D O I：
10.19595/j.cnki.1000-6753.tces.190550
中图分类号：
学科分类号：
摘要：
The space vector PWM begins with the zero voltage vector (SVPWM-BWZ) for the three-level converter has the advantages of satisfying the minimum pulse width limitation and generating arbitrarily small line voltage at a low modulation index. It is suitable for start-up and low-speed status of variable frequency speed regulation system, but its implementation is complex. To solve this problem, the basic principle of SVPWM-BWZ is introduced in this paper firstly, then the equivalent relationship between SVPWM-BWZ and carrier-based PWM is analyzed. Accordingly, a carrier-based SVPWM-BWZ (CBSVPWM-BWZ) method and the corresponding neutral point balancing control strategy are proposed. The output phase voltage spectrum and pulse width characteristics of three-level converter and the switching frequency of power devices under CBSVPWM-BWZ are derived. Finally, the effectiveness of the proposed method is verified by simulation and experiments. The results show that the proposed method is completely equivalent to the traditional SVPWM-BWZ strategy. It has better modulation effect at low modulation ratio and does not need to calculate the duration of the space vector, which is more convenient to implement. © 2020, Electrical Technology Press Co. Ltd. All right res
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页码：2194 / 2205
页数：11
相关论文
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