采用零矢量补偿的矩阵变换器电流控制策略

在矩阵变换器普通滞环电流控制的基础上，针对采用18静止矢量控制会造成输入电流高频正负振荡和区间恒值为零的现象，提出一种新型电流复合控制策略。该方法不使用旋转矢量调制，将矩阵变换器等效为虚拟整流器和逆变器串接的形式，其虚拟逆变部分采用零矢量补偿的控制策略，消除了输入电流的高频正负振荡；其虚拟整流部分采用空间矢量调制以消除区间恒值为零，两者复合控制改善了输入和输出电流的品质。仿真和实验结果证明了该控制方法的可行性和正确性。

Current Control Strategies for Matrix Converter Using Zero Vectors

If only 18 stationary vectors are used for control matrix converter(MC), the input current will produce inevitably high frequency oscillation and zero sections. A novel current composite control strategy with zero vectors compensation for MC is proposed in this paper, based on the basic hysteresis current control strategy. The equivalent circuit of MC can be divided into the fictitious inverter and the fictitious rectifier without using rotational vectors. The high frequency oscillation of input current is eliminated using zero vectors compensation in the fictitious inverter and the zero sections of input current is eliminated using space vector control in the fictitious rectifier. The current composite control strategy can reduce the harmonic component of input current greatly, and output current quality is also improved. Simulation and experimental results verify the validity and feasibility of the novel control strategy.