电力系统及其自动化学报2019，Vol.31Issue(10)：125-132,8.DOI:10.19635/j.cnki.csu-epsa.000173
四桥臂三电平逆变器3D-SVPWM调制策略
3D-SVPWM Modulation Strategy for Four-leg Three-level Inverter
任思远 1肖柱 2胡博1
作者信息
- 1. 中国矿业大学电气与动力工程学院,徐州 221116
- 2. 国网湖南省电力有限公司张家界供电分公司,张家界 427000
- 折叠
摘要
Abstract
Considering the traditional complex three-dimensional space vector pulse width modulation(3D-SVPWM)al-gorithm and the problem of neutral point potential unbalance with the four-leg three-level neutral point clamped invert-er,a novel 3D-SVPWM modulation strategy based on the decomposition idea and a neutral point potential balance algo-rithm based on charge conservation are proposed. Under this modulation strategy,the spatial distribution of voltage vec-tors of the four-leg three-level converter under the αβγ coordinate system is projected on the αβ plane,which is further decomposed to a two-level structure. In addition,a two-level modulation strategy is used to modulate the reference volt-age vector. The proposed neutral point potential balance algorithm realizes the control of neutral point potential by ad-justing the action time of redundant vectors according to the principle of charge conservation. Compared with the tradi-tional modulation strategy,the proposed modulation strategy greatly simplifies the operation process and realizes the voltage balance between the upper and lower capacitors on the DC side. Simulation and experimental results verified the validity of the strategy proposed in this paper.关键词
四桥臂三电平逆变器/三维空间矢量脉宽调制/坐标平移/中点电位平衡/电荷守恒Key words
four-leg three-level inverter/three-dimensional space vector pulse width modulation(3D SVPWM)/coordi-nate translation/neutral point potential balance/charge conservation分类
信息技术与安全科学引用本文复制引用
任思远,肖柱,胡博..四桥臂三电平逆变器3D-SVPWM调制策略[J].电力系统及其自动化学报,2019,31(10):125-132,8.
