一种三电平虚拟空间矢量调制简化方法  

Simplified Implementation of Virtual Space Vector Modulation for Three Level

作　　者：李文善 温旭辉[1,2,3,4] 张剑[1,2,3,4] 王又珑 LI Wen-shan;WEN Xu-hui;ZHANG Jian;WANG You-long(University of Chinese Academy of Science,Beijing 100049,China)

机构地区：[1]中国科学院大学电子电气与通讯工程学院,北京100049 [2]中国科学院电工研究所,北京100190 [3]中国科学院电力电子和电气驱动重点实验室,北京100190 [4]北京电动汽车协同创新中心,北京100190

出　　处：《电力电子技术》2021年第9期112-114,共3页Power Electronics

基　　金：国家重点研发计划(2016YFB0100600);北京市自然科学基金(3192041)。

摘　　要：虚拟空间矢量调制(VSVPWM)在三电平变换器中点电位平衡控制方面性能优异,可在全工况内实现中点电位平衡。传统的虚拟矢量调制算法中仍采用查表法,占用大量的计算资源。为简化VSVPWM算法,此处基于虚拟空间矢量的空间对称性提出在旋转60°坐标系下的扇区划分和基本矢量作用时间计算。实验结果表明了简化VSVPWM算法的有效性和正确性。Virtual space vector pulse width modulation(VSVPWM) is an effective method of neutral-point voltage balancing for neutral point clamped three level converter.This modulation method guarantees the balancing of the neutral point voltage balancing of the full range of the operation conditions.The traditional virtual vector modulation algorithm still uses the look-up table method,which occupies a lot of computing resources.In order to simplify the VSVPWM algorithm,based on the spatial symmetry of the virtual space vector,the sector division and the calculation of the action time of the basic vector in the rotating 60° coordinate system are proposed.Experimental results show the effectiveness and correctness of the simplified VSVPWM algorithm.

关 键 词：三电平变换器 虚拟空间矢量调制 中点电位平衡 

分 类 号：TM46[电气工程—电器]