毕业论文：电动卷扬机传动装置课程.docVIP

毕业设计（论文） 论文题目：市电谐波分析系统设计 摘 要 谐波测量在电力系统中占有重要的地位和作用。及时、准确地掌握电网中谐波的实际状况对于电力系统的安全、运行具有重要的意义。由于谐波具有非线性、随机性、非平稳性和复杂性等特征，所以难以对谐波进行准确测量。本文针对谐波的特征，并根据电力系统谐波测量的基本要求，阐述了谐波测量的主要方法和谐波测量装置的分类，以及基于C8051F005的CPU电力系统谐波测量的硬件实现和海明窗插值FFT应用于谐波测量中的算法分析和研究。最后对电力系统的谐波测量的发展趋势提出了看法。单片机 , 快速傅立叶变换, 电力系统谐波测量 Harmonic measurement occupies an important position and Play an important role in the electrical power system. Control real time and accurately the actual condition of the harmonic is very important to the safety and operation of the electric power system. Because harmonic has inherent non-linear, random, instability, complex influence factors and so on, it is very difficult to measure the harmonic accurately. According to basic request of the harmonic measurement in the electrical power system, this paper elaborates the main harmonic measurement method, and has outlined hardware realization and the software algorithm flow of the harmonic which is based on the C8051F005 CPU electrical power system, and the algorithmic analysis and research that Hamming window interpolation FFT applied in the harmonic measures. ? KEY WORDS: C8051F005 mcu, Hamming window interpolation FFT, harmonic measurement in the power system ? 目录 一 引言……………………………………………………………………………………4 二 电力系统谐波测量的基本要求………………………………………………………5 三 谐波测量分类………………………………………………………………………… 5 四 电力系统主要测量方法……………………………………………………………… 6 1、采用模拟带通或带阻滤波器测量谐波基于傅立叶变换的谐波测量基于瞬时无功功率的谐波测量基于神经网络的谐波测量利用小波分析方法进行谐波测量7 五 基于C89051F005 快速离散傅立叶变换的谐波分析的方案………………………11 1、谐波分析系统设计框图和工作原理………………………………………………………… 11 1.1、 C8051F005单片机的特点……………………………………………………………12 1.2、隔离电路…………………………………………………………………………………13 1.3、调整电路…………………………………………………………………………………13 1.4、 键盘和显示单元（人机交换接口）…………………………………………………15 1.5、 控制单元………………………………………………………………………………15 1.6、电源………………………………………………………………………………………15 2、基于C8051F005傅立叶变换谐波测量算法研究……………………………………………16 2.1 、FFT 算法………………………………………………………………………………16 2.2 、FFT 加窗的插值算法…………………………………………………………………17 2.3、仿真…………………………………………………