目前Z源网络被应用于矩阵变换器（matrix converter，MC）中，以克服MC电压传输比（voltage transfer ratio，VTR）低的问题。提出了将超稀疏矩阵变换器与Z源网络结合而成的新型结构—Z源超稀疏矩阵变换器（Z-source ultra-sparse MC，ZSUSMC）的调制方法，该结构在超稀疏矩阵变换器的整流级和逆变级之间插入Z源网络，分析比较了在整流侧中改进型有零、无零矢量的两种空间矢量调制（space vector modulation，SVM）方法，并给出了两种调制方法的优缺点。此外，为了降低输出谐波含量和开关状态变化次数，提出了一种新型的开关切换模式，以确保在整个开关周期内开关状态的变化为最小。最后，通过软件仿真与硬件实验对ZSUSMC调制方法进行分析，结果表明ZSUSMC可以提高电压传输比，其两种调制方法各有其特点，且新型的开关切换模式可以提高输出电能质量。

Currently, the Z-source network is applied in matrix converters (MCs) to address the low voltage transfer ratio (VTR) issue of MCs. A novel structure of the Z-source ultra-sparse matrix converter (ZSUSMC)is proposed by integrating the Z-source network with the ultra-sparse matrix converter. This structure inserts the Z-source network between the rectification stage and the inversion stage of the ultra-sparse matrix converter. Additionally, two space vector modulation (SVM) methods which is improved zero-vector and non-zero-vector are analyzed and compared in the rectification stage, along with their respective advantages and disadvantages. Furthermore, to reduce output harmonic content and the number of switching state transitions, a new switching transition mode is proposed to minimize switching state changes throughout the entire switching cycle. Finally, the ZSUSMC modulation method is analyzed through software simulation and hardware experiments. The results demonstrate that the ZSUSMC can improve the voltage transfer ratio, with each modulation method having its own characteristics. Moreover, the new switching transition mode enhances the output power quality.