摘 要谐波污染对于电网及众多电气设备具有巨大威胁与损害，有源电力滤波器（APF）是一种能够抑制谐波进入电网及提高电网功率因数的电力电子装置，较之传统的谐波处理方法有极大优势，是治理电网谐波污染的有力工具。近些年开始研究的单相有源滤波器，其性能优劣与其所采用的谐波电流检测法息息相关，我们需要选择合适的方法使其能够正常工作，产生正确的补偿电流。

本文根据有源电力滤波器对谐波及无功电流检测的实时性和准确性的要求，采用基于瞬时无功功率理论的检测方法对单相电流进行分解，具体通过移相任意角度构造两相电流，计算得出基波、谐波和无功电流。79409

该方法较好地解决了单相电路的谐波和无功电流的检测，算法简单易于实现，并通过Simulink对其进行仿真研究，通过对比基波有功电流和电网电压波形，证明该方法的有效性。

毕业论文关键词：谐波检测；有源电力滤波器；单相电流分解

Abstract Harmonic pollution has a great threat and damage to the power grid and various electrical equipments。Active power filter (APF) is a kind of power electronic device which can restrain harmonics into the power grid and improve the power factor of the power grid。Compared with the traditional harmonic processing method, it has a great advantage and It’s a powerful tool to control the harmonic pollution of power grid。The performance of the single-phase active power filter that recently studied out is closely related to the harmonic current detection method。We need to choose the appropriate method so that it can work normally and generating correct compensation current。

According to the real-time and accuracy of active power filter and reactive current detection of harmonic requirements,we use the detection method based on instantaneous reactive power theory in single-phase current decomposition。Specifically the two phase current should be constructed by the phase shift at any angle so that we can calculate the fundamental, harmonic and reactive currents。

The method can solve the detection of harmonics and reactive currents in single-phase circuit。The algorithm is simple and easy to implement。 Carry out the simulation of Simulink。By comparing the fundamental active current and the grid voltage waveform, we can prove the effectiveness of the method。

keywords:Harmonic detection;Active power filter;Single phase current decomposition

目 录

第一章 绪论 1

1。1 课题背景与研究意义 1

1。1。1 谐波的产生原因 1

1。2。1 传统的谐波抑制方法 3

1。2。3 现有的谐波及无功电流检测方法 4

1。3 国内外谐波研究现状 5

1。3。1 谐波研究发展过程 5

1。3。2 现今国内外谐波抑制研究进展及存在的问题 6

1。4 本文主要研究内容 7

第二章 基于有源滤波器的新型谐波抑制方法 8

2。1 有源电力滤波器（APF）概述 8

2。2 有源电力滤波器的基本原理 9

2。3 有源滤波器的主要功能 10

2。4 本章小结 10

第三章 单相电路谐波检测方法研究 11

3。1 三相电路瞬时无功功率理论分析