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电网技术  2012 

单相级联型多电平逆变器一维空间矢量调制方法

, PP. 120-125

Keywords: 级联型多电平逆变器,一维空间矢量调制,错时采样,开关序列

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Abstract:

电压空间矢量脉宽调制算法在应用于多电平变换器场合时存在计算复杂、扩展性差的缺点。针对单相级联型多电平逆变器,结合错时采样原理,提出一种简化一维空间矢量调制算法。通过简单运算可以得到一维电压矢量的选取和相应的作用时间,并合理选择优化的开关导通序列,同时利用冗余开关状态实现死区,有效地避免了桥臂直通的危险。仿真和实验结果证明了本文提出调制方法的正确性和可行性。

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