矩阵变换器调制策略的鲁棒性研究

A Modulation Strategy Study of Robust Matrix Converter

矩阵变换器是一种没有中间直流环节的交-交直接变换器,其输入电压的畸变容易影响到输出电压的质量,输出电流的谐波也会通过变换器反馈到输入电流中来.通过对矩阵变换器间接空间矢量法调制策略的研究,提出了调制策略的实时调整原则,该原则能增强矩阵变换器工作的鲁棒性,使矩阵变换器在输入电压不对称、输入电压有谐波等非理想输入电压下,仍然输出理想的三相对称正弦电压,从而在电网电压不理想的情况下,为矩阵变换器的负载提供理想的电压源.

Matrix converter is a kind of AC-AC converter without DC link. The input voltage distortion is easy to be introduced into the output voltage and the output current harmonics are feedback into the input current by the converter. This paper discusses this issue and proposes a real-time adjust regulation on its modulation strategy. Based on this regulation the matrix converter can supply balanced sine wave output voltage even under distorted or harmonics power grid, thus supplies an ideal voltage source for its load.