论文部分内容阅读
针对输入电压不平衡条件下三相-单相矩阵变换器的双空间矢量控制策略进行了研究。为补偿三相-单相矩阵变换器输出的脉动功率,推导了采用单电感进行功率解耦的调制函数,在分析不平衡输入电压下三相-单相矩阵变换器的输入电流谐波的基础上,推导了将输入电压正序分量作为输入电流参考矢量下输入电流解析式,对比分析了与传统控制方式之间电流谐波的优化关系,提出正序电压作为输入电流参考矢量并采用动态调制比进行输出相与解耦相调制的控制策略,构建了实现该控制策略的系统模型并进行了系统仿真验证。在此基础上搭建了实验样机,仿真及样机实验结果表明该控制策略在维持输出电压稳定性的同时显著降低了输入电流谐波含量,验证了理论分析的正确性和所提出的控制策略的可行性。
The dual space vector control strategy of three-phase-single-phase matrix converter under input voltage unbalance is studied. To compensate for the pulsating power output from the three-phase-to-single-phase matrix converter, a modulation function using single inductance for power decoupling was derived. Based on an analysis of the unbalanced input voltage, the fundamental of the input current harmonics of the three-phase to single-phase matrix converter , The positive sequence component of input voltage is deduced as the input current analytic formula under the input current reference vector. The optimized relationship between the current harmonics and the traditional control mode is analyzed. The positive sequence voltage is proposed as the input current reference vector and the dynamic modulation Compared with the control strategy of output phase and decoupling phase modulation, the system model to realize this control strategy is constructed and verified by system simulation. Based on this, experimental prototypes are built. The simulation and the experimental results show that this control strategy can significantly reduce the input current harmonic content while maintaining the stability of the output voltage. The correctness of the theoretical analysis and the feasibility of the proposed control strategy are verified Sex.