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The Research of an Optimized Three-Level SVPWM Strategy

机译：优化三级SVPWM策略的研究

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Three-level converter is a hot spot in the field of high power commutation research and application, and one of its key technologies is modulation strategy that deserves attention. Traditional space vector pulse width modulation (SVPWM) has some disadvantages such as complex algorithm and large amount of computation. For this, an optimized strategy is proposed. By redividing the vector sector, the three-level SVPWM is converted into two-level SVPWM. And the mature and simple seven-stage two-level SVPWM technology is used to obtain the control of equivalent switching state, which simplifies the calculation and is easier to be realized digitally. At the same time, according to the characteristics of this modulation strategy, a neutral point voltage balance control method is proposed. Finally, the feasibility of this strategy is proved by simulation experiments.
机译：三级转换器是高功率换向研究和应用领域的热点，其关键技术之一是值得关注的调制策略。 传统的空间矢量脉冲宽度调制（SVPWM）具有一些缺点，如复杂算法和大量计算。 为此，提出了优化的策略。 通过重新传输矢量扇区，三级SVPWM被转换为两级SVPWM。 而且，成熟和简单的七级两级SVPWM技术用于获得等效切换状态的控制，这简化了计算，并且更容易以数字方式实现。 同时，根据该调制策略的特征，提出了中性点电压平衡控制方法。 最后，通过模拟实验证明了这种策略的可行性。

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