基于级联型错时采样空间矢量调制多电平变流器的APF研究

该文提出并分析了错时采样空间矢量调制(STS—SVM)技术的工作原理及其在级联型多电平变流器上的实现方法。实现的多电平变流器结合了STS—SVM和级联型多电平变流器两者的优点，使用元件数目少、直流侧均压容易实现、易于模块化设计和调试，实验结果验证了理论分析的正确性。最后通过仿真研究了级联型STS-SVM多电平变流器在有源电力滤波器中的应用特点。

RESEARCH ON CASCADE MULTI-LEVEL CONVERTERS WITH SAMPLE TIME STAGGERED SVM AND ITS APPLICATION TO APF

In this paper, the principle of Sampling Time Staggered Space Vector Modulation (STS-SVM) as well as its realizing method in cascade multilevel converters is presented. Thank to the advantages of STS-SVM and cascade multilevel converters, the cascade multilevel converters with STS-SVM have many advantages as follows: the amount of the devices is the least; DC bus voltage balance is easier implemented; each level has same structures and is easy to design and assembly modularizedly. The experimental result proves the correctness of theoretical analysis. In the end, the applications of cascade STS-SVM multilevel converters on active power filter is researched, Simulated results are given that verify this APF can compensate the harmonic and reactive current correctly and validly.