【摘要】 针对双级矩阵变换器(TSMC)拓扑的两个固有缺陷—前后级之间强耦合性和弱抗干扰性问题,传统空间矢量调制策略实现复杂且需两级协调而无法解决上述两个问题。本文提出了一种适用于TSMC的预测电流控制策略,以离散化数学模型为基础,利用当前时刻的采样值对下一时刻的输入输出电流量做出预测计算,将网侧无功功率最小和输出电流低纹波作为系统主要控制目标,循环优化开关状态,使其在正常和非正常工况下输出电流均能时刻跟随参考给定,提高了系统鲁棒性,降低了前后级耦合影响,并实现了"绿色"网侧性能。实验验证了方案的可行性。更多还原

【Abstract】 As for the two shortcomings of strong coupling and weak anti-interference between the front and rear stages in a two-stage matrix converter(TSMC),it is difficult to effectively solve the above two problems by the traditional space vector modulation strategy because of complex implement and coordination-requirement of two stages in this topology,with a predictive current control strategy used for TSMC proposed.The prediction calculation is implemented in this control strategy based on the discretization mathematical model.The main control target is set to minimize the grid-side reactive power and output current ripple,so that the output current can follow the given value under a normal or an abnormal condition;moreover,the robustness of system is improved and the coupling influence of the two stages is reduced as well as the "green" grid-side performance is achieved.The feasibility of this method is verified by simulation and experiment.更多还原