When the grid voltage produces unbalanced conditions,the current and voltage will have large fluctuations,and it is difficult to regulate the power quality of Y-source two-stage matrix converter(YSTSMC)using the traditional PI controller.In order to improve the input control of the YSTSMC under unbalanced grid voltage,the differential flatness control(DFC)strategy is proposed,and the dynamic modulation coefficient is used to reduce the high harmonic fluctuations produced by active power under unbalanced conditions.The results of simulation show that DFC-based control strategy can improve the system response speed and output power quality.
关键词
Y源双级矩阵变换器/不平衡电压/微分平滑控制/输入功率控制/输出电压补偿
Key words
Y-source two-stage matrix converter/unbalanced voltage/differential flatness control/input power control/output voltage compensation
维普
万方数据