基于空间矢量的三电平间接矩阵变换器简化策略研究

针对传统三电平空间矢量脉宽调制的开关矢量作用次序的选取较为复杂、算法的运算量较大等缺点,提出一种运用到三电平间接矩阵变换器上的简化空间矢量调制策略。该方法在整流级采用无零矢量的调制策略,保证输入电压功率因数达到最大。逆变级采用简化扇区的空间矢量调制,使参考电压旋转归一到第一扇区,然后进行参考电压修正和降电平处理。该调制策略与传统调制策略相比,不仅使算法运算量比原来减少,无需预先存储大量数据,还使谐波畸变率比原来降低。通过仿真对简化的空间矢量调制策略进行验证,并且搭建样机平台,用实验的方法对该策略的可行性和正确性进行验证。

Research on simplified strategy of three-level indirect matrix converter based on space vector

According to the disadvantages of traditional three-level space vector pulse-width modulation with the complexity of the selection of switching vector order and the large computational complexity of the algorithm, a simplified space vector modulation strategy applied to the three-level indirect matrix converter is proposed. On the device, this method adopts a modulation strategy with no zero vector in the rectification stage to ensure that the input voltage power factor reaches a maximum; the inverter stage uses space vector modulation of the simplified sector reconstruction to rotate the reference voltage into the first sector. Then reference voltage correction and level-down processing are performed. Compared with the traditional modulation strategy, this modulation strategy not only reduces the computational complexity of the algorithm but also eliminates the need to store a large amount of data in advance, and also reduces the harmonic distortion ratio. The simplified space vector modulation strategy is verified on simulation and an experimental prototype platform is built. The correctness and feasibility of the modulation strategy are verified by experimental methods. This work is supported by National Key Research and Development Program of China (No. 2016YFC0600906) and Natural Science Foundation of Henan Province (No. 182300410280).