毕业设计（论文）-基于有源滤波器和FFT的电力系统谐波检测方法研究精选.doc

毕业设计论文 姓名：学号： 学院：电气工程学院 专业： 电子信息工程 题目：基于有源滤波器和FFT的电力系统谐波检测 方法研究 指导教师： (姓名) (专业技术职务) 2015年6月 摘要 电网容量越来越大，越来越多，结构复杂，很多对电力系统非线性负载的谐波污染更加难以控制，谐波的产生将减少能源使用的生产效率;使电气设备过热，振动和噪声，绝缘老化并缩短其寿命，而且还可能造成电力系统当地生产的串联和并联谐振，从而增加高次谐波成分被烧电容器器件。许多类型的电网谐波源，分布广，应指导谐波前，对谐波含量和起始的分布和结束其发生的时间可以掌握，可以控制谐波区分，会降低治疗难度。谐波检测的基础是解决谐波的问题，并且精度和速度动态响应速度的谐波检测电平取决于谐波检测方法中使用的优点。谐波检测方法是模拟滤波器的方法，是根据基于傅立叶瞬时无功功率的谐波检测方法变换谐波检测方法，并基于若干有源滤波器谐波检测方法的方法。 关键词有源滤波器；快速傅里叶变换；瞬时无功功率；谐波检测 Abstract Reduce with the power capacity increased and the structure of the complex, a large number of nonlinear load makes the harmonic pollution in power system becomes more and more serious and complex, harmonic can make electricity production, transmission and utilization efficiency; so that overheating of electrical equipment, vibration and noise, and the insulation aging, shorten the service life, even cause power system produced locally resonant parallel or series resonant and enlarge the harmonic content, resulting in capacitor equipment destroyed. The types of harmonic sources in power system, widely distributed, if before the harmonic control and on the harmonic distribution, content and the starting and ending time to clear grasp, which can be distinguished on harmonic governance, will reduce the management difficulty. The harmonic detection is the basis of the solution to the harmonic problem. The accuracy of the harmonic detection and the speed of the dynamic response depend on the merits of the method of the harmonic detection.. At present, commonly used harmonic detection methods mainly include: analog filter and a method based on instantaneous reactive power, the harmonic detection method, harmonic detection method based on Fourier transform and based on active power filter harmonic detection method and so on several methods. Keywords: Active filter; Fast Fourier transform; Instantaneous reactive power; Harmonic detection 目录 摘要 I Abstract II 第1章绪论 5 1.1课题背景及意义 5 1.1.1 课题背景 5 1.1.2 课题研究的意义 6 1.2 谐