一种从两电平拓展到三电平的SVPWM的优化调制策略  

An optimized SVPWM modulation strategy from two level to the three lvel

作　　者：江智军[1] 王伟[1] 

机构地区：[1]南昌大学信息工程学院,江西南昌330031

出　　处：《南昌大学学报（理科版）》2014年第6期553-558,共6页Journal of Nanchang University(Natural Science)

基　　金：江西省科技厅攻关资助项目(2008S00262);江西省教育厅科技资助项目(2009S00705)

摘　　要：利用伏秒原理将矢量等效代换,提出一种从两电平SVPWM调制算法直观简便地拓展到三电平的SVPWM调制算法,尽可能避免了三角函数运算。由控制器直接给出矢量角度,扇区判断简单,运算量小。利用矢量叠加代换,得出一种优化调制序列,不仅降低了共模电压,而且降低了整体谐波畸变率。最后通过Matlab仿真,比较优化调制序列前后的共模电压以及谐波畸变率,验证了这种SVPWM算法的有效性及在此算法基础上优化调制序列的优越性。With vector equivalent substitution based on the volt-second principle,we presented a SVPWM modulation algorithm directly from two level expanded to the three-level SVPWM modulation algorithm,as far as possible to avoid the trigonometric function calculations.Vector angle were given directly.Sector judgment was convenient with simple calculations needed.Based on vector superposition substitution,an optimized sequence modulation was proposed,which reduced the common-mode voltage and the total harmonic distortion rate.Finally,we compared the common mode voltages and harmonic distortion rates of Matlab simulation between the optimization sequence modulation and the common.The effectiveness of the SVPWM algorithm and the advantages of optimized sequence modulation were verified.

关 键 词：三电平 SVPWM 逆变器 共模电压 优化调制序列 

分 类 号：TM921.51[电气工程—电力电子与电力传动]