中文摘要：

本文深入分析了双级矩阵式变换器的拓扑结构和调制策略。根据中间直流环节电压必须为正的原则，确定了输入功率因数角的调节范围。研究了输入滤波器对输入功率因数的影响，推导得出了网侧功率因数角的计算公式。Matlab仿真结果验证了理论分析的正确性。

英文摘要：

The topology and modulation method of the two-stage matrix converter is analyzed deeply. Under the requirement that the dc link voltage of the two-stage matrix converter must be positive, the regulation range of input power factor angle is determined. In addition, the influence of input filter on input power factor is considered. The mathematical equation for calculating the input power factor angle is presented. The theoretical analysis has been verified through simulations by using Matlab.