**师范学院2012届本科毕业论文 0 目录 摘 要 ................................................................................................................................................ 2 Abstract ............................................................................................................................................ 2 1：绪论............................................................................................................................................. 2 1.1课题背景 ............................................................................................................................ 2 1.2谐波的产生 ........................................................................................................................ 3 1.3电网中谐波的危害 ............................................................................................................ 5 1.4研究谐波的重要性 ............................................................................................................ 5 2：谐波的限制标准和常用措施 ..................................................................................................... 7 2.1国外谐波的标准和规定 .................................................................................................... 8 2.1.1谐波电压标准 ........................................................................................................ 8 2.1.2谐波电流的限制 .................................................................................................... 9 2.2我国谐波的标准和规定 .................................................................................................... 9 2.2.1谐波电压标准 ...................................................................................................... 10 2.2.2谐波电流的限制 .................................................................................................. 11 2.3谐波的限制措施 .............................................................................................................. 12 3：谐波的检测与分析 ................................................................................................................... 15 3.1电力系统谐波检测的基本要求 ...................................................................................... 15 3.2国内外电力谐波检测与分析方法研究现状 .................................................................. 15 3.3谐波的分析 ...................................................................................................................... 18 3.3.1电力系统电压（或电流）的傅立叶分析 .......................................................... 19 3.3.2基于连续信号傅立叶级数的谐波分析 .............................................................. 19 4：电力谐波基于FFT的访真 ....................................................................................................... 21 4.1快速傅立叶变换的简要和计算方法 .............................................................................. 21 4.1.1快速傅立叶变换的简要 ...................................................................................... 21 4.1.2快速傅立叶变换的计算方法 .............................................................................. 21 4.2 FFT应用举例 .................................................................................................................. 22 5：结论........................................................................................................................................... 28 附录： ............................................................................................................................................ 28 参考文献：..................................................................................................................................... 30 致谢： ............................................................................................................................................ 30 **师范学院2012届本科毕业论文
1 基于MATLAB的电力谐波分析
学生： 指导老师： 电气信息工程学院
摘 要：电力系统的谐波问题早在20世纪20年代就引起人们的注意，到了50年代和60年代，由于高压直流输电技术的发展，发表了有关换流器引起电力系统谐波问题的大量论文。70年代以来，由于电力电子技术的飞速发展，各种电力电子装置在电力系统、工业、交通及家庭中的应用日益广泛，谐波所造成的危害也日趋严重。世界各国都对谐波问题予以充分的关注。 本文首先对目前国内外电力谐波检测与分析方法进行了综述与展望，并对电力谐波的基本概念、性质和特征参数进行了详细的分析，给出了谐波抑制的措施。并得出基于连续信号傅立叶级数的各次谐波系数的计算公式，推导了该计算公式与MATLAB函数FFT计算出的谐波系数的关系。实例证明：准确测量各次谐波参数，对电力系统谐波分析和抑制具有很大意义，可确保系统安全、可靠、经济地运行。同时实验结果表明，该法对设备要求不高，易于实现。 关键字：MATLAB 电力谐波分析 Harmonic Analysis of Electric Power System Based
On Matlab
Student: Teacher: Electrical and Information Engineering
Abstract:The harmonic problem of electric power system has caused the attention of people in1920s and 1930s.Until 1950s,owing to the development of high voltage direct current transportation electricity technology,people published a large number of theses about the electricity power system harmonic problem,which caused by the current transform device.Since 1970s,because of the speedly development of eletricity power electronics technology,the various electric power electronics devices were applied extensively in the electric power system,industry,traffic and family,but the harm which the harmonic creates was serious more and more.Many country of the world all pay attention to the harmonic problem. Summary and Prospects of the first domestic and international power harmonics detection and analysis methods, and power harmonics of the basic concepts of the nature and characteristic parameters of a detailed analysis, given a harmonic suppression measures. Obtained based on the