级联型有源滤波器均压控制方法的研究

研究了级联型H桥有源滤波器（Active Power Filter,APF）的拓扑结构与控制方法；基于级联有源滤波器直流侧电压失衡问题，提出了一种分层控制思想，顶层主要是实现有功指令电流跟踪和相间电压的均衡，底层控制则是实现相内各H桥模块电压的均衡，从而有效的解决了相间电压和相内电压的均衡问题；使用仿真软件PSCAD/ EMTDC初步实现了该控制策略的仿真验证；最后，搭建以DSP+FPGA为控制核心的实验平台并进行试验验证。

Research On Voltage Equalization Control Method Of Cascaded Active Power Filter

The Topology structure and controlling method of a cascade type H bridge APF was studied; Based on the DC side voltage imbalance, a hierarchical control was proposed; The top layer was mainly used to realize the equalization of the active command current tracking and the phase voltage, and the underlying control was used to achieve the phase of the H bridge module voltage balance, which effectively solved the phase voltage and phase voltage balance problem; The simulation of control strategy was preliminarily verified by using PSCAD / EMTDC simulation software; Finally, with the DSP + FPGA as the core of the experimental platform was set up and the experimental verification was done.