中文摘要：

将级联桥多电平逆变器拓扑结构应用于大容量基波磁通补偿（FMFC）有源电力滤波器（APF），分析了级联H桥拓扑及其工作机制，应用载波移相脉宽调制（cPs—sPwM）技术，通过调节变换器电压的幅值间接达到快速跟踪基波电流，实现基波补偿条件。仿真结果表明，与两电平拓扑结构滤波装置相比，该方法电流跟踪精度高，输出谐波含量少，使得串联变压器能够更好地对谐波呈现高阻抗；最后，搭建RT-Lab半实物实验平台，实验结果证明了将多电平级联H桥拓扑结构应用于大容量FMFC—APF的可行性。

英文摘要：

The bridge cascade multi-level inverter topology is used in large-capacity fundamental magnetic flux com- pensation （FMFC） active power filter（APF）, the working mechanism of cascaded H-bridge topology is analyzed, the carrier phase shift pulse width modulation （CPS-SPWM） technology is used, by adjusting the amplitude of the convert- er voltage to achieve fast track the fundamental current indirectly, the conditions of FMFC is realized.Simulation re- sults show that, compared with the two-level topology filtering device this method has the advantages of high preci- sion current tracking and low output harmonics, making the series transformer easily reach a high impedance to har- monics.Finally, RT-Lab semi-physical experimental platform is build,the experimental results demonstrate the feasibility of the multi-level cascade H-bridge topology used in FMFC-APF.