摘要在电子设备使用越来越广泛的现阶段，非线性负载所造成的谐波污染日益严重。而反观现有的滤波手段，其对于谐波的补偿效果并不是特别理想。因而选择一种高质量、补偿性能优异的滤波器有着非常重要的意义所在。86364

本文着眼于单H桥结构的三电平有源电力滤波器，针对于该拓补结构，分析比较几种谐波检测算法，选定滑窗迭代DFT谐波检测算法。与此同时，在控制层面提出一种基于多矢量谐振控制器的控制方案。通过分析单H桥三电平变换器拓扑的优点，并基于αβ坐标系下建模，避免了电流交叉耦合对控制器设计的影响。进而分析矢量谐振控制器的电流跟踪特性，确定控制器参数。建立基于多矢量谐振控制的闭环控制系统，分析控制系统性能。

最后进行仿真实验，最终的结果表明，采用所提的控制方法的三电平有源电力滤波器有着谐波滤除效果好、动态响应速度快及跟踪精度高的优点，可为实验装置产品化提供参考。

毕业论文关键词： 有源电力滤波器；单H桥；变换器；矢量谐振控制

Abstract Nowadays, as the electronic equipment is more and more widely used at present, serious harmonic pollution caused by nonlinear load。Whereas existing filtering method, its for harmonic compensation effect is not very ideal。 So choose a quality and compensation performance of filter has very important meaning。

This article focus on three level of the single H bridge structure of active power filter, in which the topology structure, analysis and comparison of several harmonic detection algorithm, iterative DFT harmonic detection algorithm is selected sliding window。 Meanwhile, in the control plane proposes a resonant controller based on vector control scheme Aim to the harmonic compensation of three-level active power filter with single H bridgestructure, The control scheme of multi vector proportional resonant controller to suppress specific harmonicis proposed。 The advantages of three-level converter topology with single H bridge are analyzed。 The mathematical model of active power filter is established based on αβ coordinate system, and current cross decoupling link is omitted。 The current tracking characteristics of vector resonant controller is analyzed, and determine controller parameters。 The closed-loop control system based on multi vector resonance controller is established, and the performance is analyzed。 

Both the simulation and experiment results showed that the three-level active power filter with the proposed control method has the advantages of good harmonic filtering effect, fast dynamic response and high tracking accuracy, which can provide reference for the experimental device。

Key words： Active Power Filter； Single H Bridge； Converter； Vector Proportional Resonant Control

目 录

第一章 绪论 1

1。1课题背景及意义 1

1。2国内外研究现状以及存在的问题 1

1。3 主要研究内容 3

第二章 有源电力滤波器的原理 4

2。1引言 4

2。2 有源电力滤波器的原理分析 4

2。3谐波检测 6

2。3。1现有的几种检测方法 6

2。3。2  瞬时无功功率理论及谐波电流检测方法 8

2。4本文选取的滑窗迭代DFT谐波检测算法 12

2。5本章小结