Sector Subdivision Based SVPWM Strategy of Neutral-Point-Clamped Three-Level Inverter for Current Ripple Reduction

被引：5
|
作者：
Zhang, Guozheng [1 ]
Wei, Bingxu [1 ]
Gu, Xin [1 ]
Li, Xinmin [1 ]
Zhou, Zhanqing [2 ]
Chen, Wei [2 ]
机构：
[1] Tianjin Polytech Univ, Sch Elect Engn & Automat, Tianjin 300387, Peoples R China
[2] Tianjin Polytech Univ, Sch Artificial Intelligence, Tianjin 300387, Peoples R China
来源：
ENERGIES | 2019年 / 12卷 / 14期
基金：
中国国家自然科学基金;
关键词：
three-level inverter; harmonic distortion; current ripple; space vector modulation; HARMONIC DISTORTION; MODULATION; PWM; VSI;
D O I：
10.3390/en12142734
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
This paper presents a sector subdivision based space vector pulse width modulation (SVPWM) strategy with reduced current ripple for a three-level inverter. Using the output current ripple theory, closed-form expressions of average current ripple vectors for both continuous and discontinuous switching sequences are derived. Based on the sector and triangle distributions of conventional SVPWM strategy, each triangle is further divided into three small-regions. Then the switching sequence with the lowest magnitude of the average current ripple vector is applied in every small-region, so that the advantages of continuous pulse width modulation (CPWM) and discontinuous pulse width modulation (DPWM) under different modulation index conditions are combined to reduce the current ripple in the whole modulation range. The output performance of the proposed strategy is compared with the conventional CPWM and DPWM strategy, and experimental results verify that the proposed strategy could reduce the current ripple of three-level inverters effectively.
引用
收藏
页数：16
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