基于滤波器状态反馈的矩阵变换器网侧电流闭环策略  

A Grid Current Closed-Loop Control Strategy for Matrix Converter Based on States Feedback of Filter

作　　者：陆松[1] 葛红娟[1] 陈思[1] 徐媛媛[1] 许宇翔[1] 

机构地区：[1]南京航空航天大学新能源发电与电能变换重点实验室,南京210016

出　　处：《电工技术学报》2016年第7期65-71,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(U1233127);航空科学基金(2012ZC52034)资助项目

摘　　要：滤波器的引入降低了矩阵变换器轻载时的网侧功率因数,而滤波器的谐振特性更会导致系统不稳定。针对该问题,提出一种基于滤波器状态反馈的矩阵变换器网侧电流闭环控制策略,该策略以同步旋转坐标系下网侧电流为控制目标,并将滤波器状态变量的瞬时扰动引入电流环,对虚拟整流级电流矢量的期望值进行实时补偿,并根据补偿后的电流矢量期望值调制矩阵变换器。通过设置合理的反馈系数矩阵,滤波器的状态反馈使系统闭环极点移至更稳定的区域,增强了系统的稳定性。最后,实验结果表明该策略可以有效阻尼矩阵变换器动态过程的振荡,并能在全功率范围内使网侧保持较高功率因数。The use of the input filters usually results in the decreasing of the input power factor（ IPF）,especially under light-load condition. And the system stability is also influenced by the resonant characteristics of the LC filter. To solve these problems,a grid current closed-loop control strategy based on states feedback of the filter for the matrix converter is proposed. As the control targets in this scheme,the gird currents in synchronous reference frame are the feedback of current loop. Besides,the transient disturbances of filter state variables are also added to compensate the current vector reference of virtual rectifier. According to this current vector reference,matrix converter is modulated. By designing a proper state feedback gain matrix,the closed-loop poles of the system are shifted to a more stable area,which enhances the system stability. Finally,experimental results show that the oscillation of dynamic process is damped effectively and a high power factor is attained at full power range.

关 键 词：矩阵变换器 LC滤波器 电流闭环 状态反馈 

分 类 号：TM46[电气工程—电器]