摘要随着电力系统中谐波污染越来越严重，人们越来越重视对谐波问题的研究。现阶段，国内外大多采用主动型和被动型的方法来抑制谐波，使系统能够安全稳定的运行。然而这些方法的本质都是消除谐波，减弱谐波污染造成的危害。但是谐波本身也是一种能源，若能够采用合适的方法将谐波电能进行提取利用，便能够最大程度的利用能源，实现资源的循环使用。因此本设计将对谐波提取利用进行研究。本文首先了解了一些有关谐波的概念以及谐波处理的方法和研究现状，并分析研究了本设计中应用的调谐技术和基波磁通补偿原理。在不取用基波无功的前提下，提出并论证了通过变压器和无缘滤波电路相结合获取谐波电能的方法。最后，利用MATLAB搭建该电路的仿真模型，对谐波提取实现的情况进行仿真分析，证明了本方案的正确性和优越性。58404

毕业论文关键词：谐波提取；基波磁通补偿；调谐技术；变压器；基波电流检测

Abstract

Along with the harmonic pollution in the power system becoming more and more series,people pay more attention to the research of harmonic.At the present stage,most of the active and passive methods are used to restrain the harmonic both here and abroad,so that the system can run safely and stably.However,the essence of these methods is to eliminate harmonics and the harm caused by harmonic pollution.But the harmonic is a kind of energy,to maximize the use of the resource,we can use the appropriate method to extract the harmonic energy.Therefore the research on the use of harmonic extraction will be made in this design.In this paper, firstly,some concepts of harmonic,harmonic processing methods and research status are comprehended, and I also analysis the tuning techniques and fundamental magnetic flux compensation used in this design.On the basis of these,a technique combined with the fundamental magnetic flux compensation and tuning technique is proposed,which can obtain the harmonic power by the premise of without the consumption of fundamental power through the three winding transformer. Finally,I use the MATLAB to build the simulation model to analysis the situation of harmonic extraction and utilization, which proves the correctness and superiority of this proposed scheme.

Keywords: Harmonics extraction; Fundamental magnetic flux compensation; Tuning technique; Transformer; Current tracing control

目  录

第一章  绪论 1

1.1 选题的背景 1

1.1.1 谐波问题产生的背景 1

1.1.2 谐波和无功功率的危害 1

1.2 选题的目的和意义 2

1.2.1 现阶段谐波处理的方法 2

1.2.2 谐波提取利用的意义 2

1.3 选题的背景 2

1.3.1 谐波理论方面的研究 3

1.3.2 谐波抑制的方法 3

1.3.3 谐波利用的方面 4

1.4 本文主要内容和章节安排 5

第二章  谐波介绍及无源滤波器的设计 7

2.1 电力系统中的电能质量和谐波问题 7

2.1.1 电能质量的概述 7

2.1.2 谐波的基本概念 7

2.1.3 非正弦电路有功和无功功率定义 9

2.2 无源滤波器的结构和基本原理