电力电子变流电路的谐波分析和无源滤波器设计.docx

电力电子电路的谐波分析和无源滤波器设计

摘要

随着电力电子技术的深入发展，电力电子设备在现代电力系统中得到了大量应用，

但与此同时电力电子装置向电力系统发射大量谐波，这对电力系统的电磁兼容性能带来

了严重挑战。针对电力电子设备可能给电力系统带来的电磁兼容问题，本文分析了电力

电子电路的谐波发射特性，设计了无源滤波器以滤除电力电子电路产生的谐波，并通过

MATLAB/Simulink 仿真软件对谐波分析结果和无源滤波器的滤波效果进行了验证。仿真

结果表明，谐波发射特性的理论分析与实际电力电子设备的谐波发射特性相吻合，本文

Abstract

With the further development of power electronics, power electronic equipment has been

widely utilized into the modern power system. However, power electronic devices emit an

enormous number of harmonics to the power system, which brings serious challenges to the

electromagnetic compatibility performance of the power system. Aimed at the electromagnetic

compatibility (EMC) problem that power electronic equipment possibly causes for the power

system, this paper firstly analyses harmonic emission characteristics of power electronic

circuits. Meanwhile, a passive power filter (PPF) applied to filter the harmonic generated by

power electronic circuits is also designed. Then, the harmonic analysis and the filtering effect

of PPF via MATLAB/Simulink are verified. The simulation results yield that the theoretical

摘要...............................................................................................................................................I

Abstract.......................................................................................................................................II

1. 前言...........................................................................................................................................1

2. 电力电子电路的谐波问题.......................................................................................................2

2.1 不控和相控变流电路的谐波问题.....................................................................................3

2.1.1 三相 6 脉波桥式变流电路的谐波问题......................................................................3

2.1.2 三相多重化变流电路的谐波问题..............................................................................5

3.2 高通滤波器.......................................................................................................................18

3.2.1 二阶高通滤波器........................................................................................................18

3.2.2 C 型高通滤波器........................................................................................................19

4. 仿真验证.................................................................................................................................22

5. 总结与展望.............................................................................................................................26

参考文献.....................................................................................................................................28

1. 前言

电磁兼容(Electromagnetic Compatibility, EMC)主要研究在考虑设备设计与运行工况

的情况下使其免受一定量的电磁干扰(Electromagnetic Interference, EMI)，同时使设备自

身产生的电磁干扰保持在规定的限值内，是一门现代科学技术体系中的重要学科分支

电磁兼容与电磁干扰相伴而生、相辅相成，研究电气设备的电磁兼容问题首先要考

虑电气设备接收和发射的各种电磁干扰。电磁干扰指的是电气设备在运行过程中发射的

一切形式的干扰其它设备正常运行的电磁能量

高电气设备运行的安全性和稳定性，但无法被利用的电磁干扰信号将会严重危害电气设

备的正常运行，必须采用适当的方法加以滤除。随着科学技术的不断发展，电气设备的

数量和种类日渐增加，电力系统的规模和发出的能量也持续增加，电力系统电磁干扰的

向导电性。

。