摘要如今，电力电子电路广泛应用于工业设备,如变频系统、电动系统等等,为工业生产带来很大便利的同时，由于这类电子设备自身所具有的非线性阻抗作用会产生大量的谐波电流，会导致许多的不良影响,如系统功率因数变低、效率变低与电网稳态系统被破坏等，不仅如此,一些接入电网的精密仪器和通讯设备也会因此而受到谐波的干扰。因此,提高电能质量的有效利用在近年来已经成为一个非常重要的课题。86545

本文提出了一种基于基波磁通的串联混合有源滤波器对电流进行检测，继而实现谐波抑制的方法。其基本原理是利用逆变器产生一个与非线性负载系统中产生的谐波电流大小相同，方向相反的补偿电流进行相抵消，从而达到抑制或者消除系统中谐波电压的目的。

在MATLAB仿真软件系统中建立非线性负载与在混合有源滤波器中注入补偿非线性负载谐波电流的模型，并对仿真结果进行分析。仿真结果表明,该方案具有预期的性能。

毕业论文关键词:谐波、电流检测、电力系统、混合有源滤波器。

Abstract   Nowadays, more and more power-electronics circuits are widely used in the field of industrial equipment,including of frequency changers,motor-drive systems and so on。Because of these kinds of equipment presenting nonlinear impedance to the utility,which would generate lots of  harmonic currents resulting in well known adverse effects such as low power factor ,low efficiency and communication equipment will be interfered,either。Therefore，improving utility power quality effectively has become an important research subjects recently。

  This dissertation put forward a hybrid active filter based on current detection for harmonic currents generated by nonlinear loads。A hybrid active power filter is developed to demonstrate the performance of the proposed method。Its basic principle is to use the inverter to produce a compensation current that having the same size and in the opposite direction of the harmonic currents which come from nonlinear load system,so as to suppress or eliminate harmonic voltage in the system。

  The system is modeled in MATLAB to consist of the nonlinear loads,with a hybrid active filter to compensate for the harmonic current injected by the nonlinear loads。The simulation results show us that the power filter has the expected performance。 

Keywords:Harmonic,current detection,power system,hybrid active filters

目录

第一章 绪论1

1。1 电力电子技术的新发展与在电力系统中的应用-2

1。2 谐波问题及危害2

  1。3 谐波的抑制方法3

1。4 国内外滤波器的研究现状4

1。5 本文主要安排4

第二章 谐波源、无源有源滤波器的定义与分类-6

2。1谐波源的分类6

2。2 无源与有源电力滤波器的分类6

2。2。1 无源电力滤波器的定义与分类6

2。2。2 有源电力滤波器的定义与分类7

2。3 混合型APF的拓扑结构-8

2。4 本章小结-10

第三章 有源滤波器中的基波（谐波）电流的检测与控制方法-11

3。1 有源电力滤波器的谐波测量-11

3。2 有源电力滤波器的电流控制-12

3。3 本章小结-14

第四章 基波磁通补偿的串联混合有源滤波器工作原理15

  4。1 基波磁通补偿的串联混合APF工作原理-15

4。2 数学建模和仿真分析-18

4。3 本章小结-25

第五章 仿真分析27

  5。1 系统建模-27

5。2 谐波源仿真分析-29

5。3 本章小结-30

结论（或结语）31

致谢-32

参考文献34