摘要
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 double space vector control strategy for three-phase to single-phase matrix converter（3-1MC） in the situation of unbalanced input voltage was researched. In order to compensate the output pulsating power of the 3-1MC, the power decoupling modulation function of the single inductor was derived. In the base of analyzing input current harmonic of the 3-1MC, the input current expression under taking the positive sequence component of unbalanced input voltage as reference input current was deduced. The relationship of current harmonics between the condition and the traditional control mode was analyzed. A control strategy including taking the positive sequence component of unbalanced input voltage as reference input current and dynamic modulation ratio was proposed. The system model was constructed to realize the control strategy and the system simulation was carried out. In this way, the experimental prototype was built, the simulation and experimental results show that the proposed control strategy can significantly reduce the input current harmonics while maintaining the stability of the output voltage. The correctness of the theoretical analysis and the feasibility of the proposed control strategy are verified.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2016年第23期6511-6517,6618,共7页
Proceedings of the CSEE
基金
国家自然科学基金项目(U1233127)~~
关键词
三相-单相矩阵变换器
不平衡输入
功率解耦
正序分量
three-phase to single-phase matrix converter
unbalanced input
power decoupling
positive sequence component
