摘要：本文为了解决在电力电子装置大力发展应用的时代背景下在电力网络中由大量具有非线性性质的电力电子器件所导致的严重的谐波污染，应用了建立在瞬时无功功率理论基础上的检波方法、包含比例控制和前馈控制的电流环控制策略以及SPWM和SVPWM两种调制策略，采用大型应用型数学仿真软件系统矩阵实验室（Matrix Laboratory），设计出了包含指令电流计算、PWM控制、以及驱动电路模块的并联型有源电力滤波器的控制系统，通过仿真实验得出结论，本设计可以成功地解决电力网络中由于谐波所造成的巨大危害，同时也弥补了无源电力滤波器只能抑制某些固定频率的谐波且在特定环境下会与某次谐波发生谐振以致谐波放大的缺陷。59253

毕业论文关键词：有源电力滤波器，谐波，谐波检测 

Abstract:In order to solve serious harmonic pollution caused by the power electronic devices which have a large number of non-linear nature in the background that power electronic devices are developed and widely applied in the electricity network ,this thesis applies the detection method which is built on the theory of Instantaneous Reactive Power includes current loop control strategy with proportional control method and feedforward control method ,also with SPWM Modulation Strategy and SVPWM Modulation Strategy,this thesis also uses Matrix Laboratory to design a driving circuit modulethe which have functions including current calculation containing instructions, PWM control, and has a shunt active power filter control system ,in conclusion from this simulation, it can eliminate the great damage successfully in the electricity network caused by harmonics and also solve the problem that the passive power filter can only suppress certain frequencies harmonic and would resonance with certain harmonic leading to enlarge the harmonic damage under certain circumstances.

Keywords:  Active power filter，Harmonic wave，Harmonic Detection 

1 前言 4

2 电能质量 4

2.1 电能质量的指标 5

2.2 影响电能质量的因素 6

3 谐波 7

3.1 谐波的概念 7

3.2 谐波源 8

3.3 谐波的危害 8

3.4 谐波的处理方案 12

4 基于MATLAB软件的仿真 13

4.1 MATLAB简介 13

4.2 工作原理 14

4.3 有源电力滤波器仿真模型的建立 15

4.4 谐波检波模型 18

4.5 PWM信号的产生 21

4.6 仿真结果 23

结 论 26

参考文献 27

致 谢 28

1  前言

实践表明，电网会由于大量使用电力电子器件和设备而产生严重的谐波，电力系统中有产生谐波的设备即谐波源，是具有非线性特性的用电设备。当前，电力系统的谐波源，就其非线性特性而言主要有5大类：

①　软启动器（可控硅 电机启动器）；

②　开关电源、UPS、逆变元件、电池充电器；

③　变频控制的电机、起重机、电梯、泵等制造过程控制；

④　数字图片开发工具--比方电视、无线电波传输器，多功能灯具；