摘要近年来，随着电力系统的发展，电网中的非线性系统不断增加，因而产生了大量谐波，所以在消除谐波和补偿无功方面，急需突破。传统的无源滤波器，存在其本身的缺陷，这使得优点突出的有源电力滤波器得到了快速的发展。因此，为了满足谐波治理和无功补偿的要求，本文设计了一种基于两电平逆变电路的有源电力滤波器。下面的五项是设计主要研究的：

(1）研究了APF的历史，介绍了当下有源电力滤波器发展的情况。69204

(2）研究了三相APF的基本工作原理并建立其主电路数学模型。

(3）讲述了谐波检测算法中的瞬时无功功率检测法，包括了推出了p-q法，ip-iq法和d-q同步旋转坐标轴法，本文采用了ip-iq法。

(4）介绍了两种比较方法，本文采用了滞环比较方式。

(5）使用MATLAB仿真对电网电压波形、负载波形和APF补偿效果进行检测。

通过相应的操作等得知，本论文设计的APF在控制畸变波形波以及对线路的无功进行补给方面有显著的效果。因此，该两电平有源电力滤波器具有一定的指导意义和应用价值。

毕业论文关键词：有源电力滤波器  两电平  d-q检测

Design of active power filter in power system

Abstract

In recent years,with the development of power system, the nonlinear system in the power grid is increasing, so a lot of harmonics are generated.Based on this, people needs to make a big breakthrough in Eliminating harmonics and compensating reactive power.The traditional passive filter has its own defects, which makes the active power filter has been developed rapidly. Therefore, in order to meet the requirements of harmonic control and reactive power compensation, the article designs a kind of active power filter based on two level inverter circuit.The main work of this article includes:

(One) The background and significance of APF are studied,and the development of active power filter is introduced..

(Two) Analyzing the basic working principle of the active power filter and introducing the development of it.

(Three) Telling the harmonic detection algorithm of instantaneous reactive power method, which includes the launch of P-Q method, IP IQ method and d-q synchronous rotating coordinate axis method. The d and q synchronous rotating coordinate axis method is adopted in the article .

(Four) introducing two methods in current tracking control circuit,and the Triangular wave comparison method is adopted in the article.

(Five)using MATLAB simulation to monitor the grid voltage waveform, load waveform and APF compensation effect.

Keywords: Active power filter  two-level  d-q detection

目录

摘要 I

Abstract II

1绪论 1

1.1谐波的基本概念 1

1.2电网中的谐波源 3

1.2.1主要谐波产生源 3

1.2.2谐波的危害 3

1.2.3谐波治理 4

1.3有源电力滤波器的起源与发展现状 5

1.3.1有源电力滤波器的起源 5

1.3.2有源电力滤波器的发展现状 6

2 三相有源滤波器 8

2.1 APF主电路 8

2.2主电路数学模型 8

2.3主电路参数的设计