Neutral-point Balance Control Strategy of Three-level NPC Inverter Based on Proportional Resonant Algorithm

被引：0
|
作者：
Wang, Heng [1 ]
Xue, Yanping [2 ]
Chen, Chaobo [2 ]
Li, Jichao [2 ]
机构：
[1] Xian Technol Univ, Grad Sch, Xian 710021, Peoples R China
[2] Xian Technol Univ, Sch Elect Informat Engn, Xian 710021, Peoples R China
来源：
2021 PROCEEDINGS OF THE 40TH CHINESE CONTROL CONFERENCE (CCC) | 2021年
关键词：
Neutral-point clamped (NPC) inverter; space vector pulse width modulation(SVPWM); neutral-point voltage balance; proportional resonant(PR) algorithm;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
To solve the inherent neutral-point voltage fluctuation problem of neutral-point clamped three-level inverter (NPC), a neutral-point voltage balance control strategy based on Proportional Resonant (PR) algorithm is proposed.Firstly, the topology and Space Vector Pulse Width Modulation (SVPWM) of NPC three-level inverter are introduced briefly.Secondly, the influence of space vector on neutral-point voltage is analyzed in detail. Then, according to the negative relationship between the positive and negative small vectors on the neutral-point voltage, the DC side neutral-point voltage deviation is introduced into the PR closed-loop control, and the action time of the positive and negative small vectors is dynamically adjusted. This method effectively reduces the neutral-point voltage fluctuation and at the same time reduces the harmonic distortion rate of the output voltage. Finally, the feasibility and effectiveness of the proposed method are verified by simulation.
引用
收藏
页码：4653 / 4658
页数：6
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