摘要在电力系统中，由于非线性设备的广泛使用，都不可避免的产生非正弦波形，使得电压和电流的波形产生畸变，电网中出现了大量的高次谐波，并产生很强的电磁干扰，使得电能质量下降。随着各类的非线性负荷的大量使用，电力系统谐波问题变的越来越严重，已经严重威胁到了电力系统的安全运行和经济运行，被认为是电力系统的一大公害。66240

    本文首先介绍了谐波的概念，谐波源的概念及其种类和产生原理。详细叙述了谐波的危害，包括其对公用电网、家庭、各种电气测量仪表的具体危害及其危害的机理。谐波源的定位和检测是谐波检测中很重要的一个部分，本文概述了谐波源定位和检测的几种方法，并比较了这几种方法的优缺点。列举了有关谐波治理的若干方法，重点考虑使用滤波器进行谐波消除，具体阐述了有源和无源滤波器的原理和各自的优缺点。最后通过MATLAB中的SIMULINK模块对系统谐波源和无源滤波器进行仿真，通过仿真具体分析出谐波源对系统产生的影响及其消除。

毕业论文关键词： 谐波源  谐波检测  谐波危害  滤波器  SIMULINK仿真

毕业设计说明书（论文）外文摘要

Title  Study on the system of harmonic sources in power and its effect on the system

Abstract

In electric power system,due to the widespread use of nonlinear devices,it will inevitably produce non-sinusoidal waveform.The emergence of a large number of harmonics in power system and produce strong electromagnetic interference with the deterioration of power quality.With the extensive use of all the non-linear load, the power system harmonic problem became more and more serious.It has been a serious threat to the safe operation and economic operation of power system.It is considered a big social effects of pollution of power system.

This paper first introduces the concept of harmonics, harmonic source concept and its type and generation principle. A detailed description of harmonic harm, including its impact on the utility grid, the family, a variety of electrical measuring instruments specific hazards and their harmful mechanisms. Harmonic source localization and detection harmonic detection is a very important part of this paper outlines the harmonic source localization and detection of several methods, and compared the advantages and disadvantages of these methods. Lists several methods for harmonic control, focusing on research to eliminate harmonic filters, specifically addressed the principles of active and passive filters and their advantages and disadvantages. Finally, the MATLAB SIMULINK module source and passive harmonic filter system simulation, the simulation analysis of the harmonic source specific impact on the system and its elimination.

Keywords  harmonic source  harmonic detection harmonic hazards  filter SIMULINK simulation 

目   次

1  绪论1

1.1引言1

1.2 课题研究背景及意义 2

1.3电力系统问题国内外研究现状3

2  谐波产生及谐波源种类5

2.1电力系统谐波的基本概念5

2.2电力系统谐波源的种类6

3  谐波产生的危害8

3.1谐波对公用电网的危害9

3.2谐波对电气设备的影响10

3.3谐波对家庭用户设备的影响11

3.4谐波对电气测量仪表的影响11

3.5谐波对通信的干扰12

3.6谐波对人体的影响12

3.7谐波谐振现象的危害12

4  电力系统谐波检测方法13

4.1目前采用的主要检测方法13

4.2基于快速傅立叶变换（FFT）的谐波检测14

4.3谐波测量的发展趋势17

5  谐波源的定位18