毕业论文--谐波电能计量算法的研究及MATLAB 仿真.doc

谐波电能计量算法的研究及MATLAB仿真 摘 要 本课题主要研究了小波变换的基本理论,为实现复杂工业现场的电能准确计量，提出了基于小波分解与重构算法的谐波电能计量方法，介绍了小波的分解与重构算法和基于该算法的谐波信号提取方法，提出了一种在谐波存在的环境下基于小波变换的有功电能计量算法，并对稳态信号的有功电能计量进行了仿真实验。 结果证实了基于小波变换算法的有功电能计量精确度可满足现行电网运行要求，具有很大的实用价值和可行性。 关键词：谐波能量，小波变换，分解与重构，稳态信号，MATLAB 仿真 Harmonic power measurement algorithm and MATLAB simulation Abstract The main topic of the basic theory of wavelet transform for the realization of complex industrial site accurate measurement of power, based on wavelet decomposition and reconstruction algorithm of the harmonic energy measurement method, introduced wavelet decomposition and reconstruction algorithm and the algorithm harmonic signal extraction, a presence in the environment based on harmonic wavelet transform algorithm for active energy measurement, and the steady-state signal energy measure were simulated. The results confirm that the algorithm based on wavelet transform energy measure accuracy can meet the requirements of the existing power grid, has great practical value and feasibility. Keywords: Harmonic energy，Wavelet Transform，Decomposition and reconstruction，Steady-state signal，MATLAB simulation. 目录 TOC \o 1-3 \u 摘 要 PAGEREF _Toc293307063 \h III Abstract PAGEREF _Toc293307064 \h IV 1 绪论 PAGEREF _Toc293307065 \h 1 1.1选题背景及研究意义 PAGEREF _Toc293307066 \h 1 1.2谐波分类及变化特点 PAGEREF _Toc293307067 \h 2 1.3谐波测量在电力系统中的重要性及电网谐波的标准 PAGEREF _Toc293307068 \h 2 1.3.1谐波测量在电力系统中的重要性 PAGEREF _Toc293307069 \h 2 1.3.2 电网谐波的标准 PAGEREF _Toc293307070 \h 5 1.4谐波测量仪器 PAGEREF _Toc293307071 \h 5 1.4.1 谐波测量仪器的分类 PAGEREF _Toc293307072 \h 5 1.4.2 谐波测量仪器的发展趋势 PAGEREF _Toc293307073 \h 6 1.5电网谐波测量方法综述 PAGEREF _Toc293307074 \h 6 1.5.1采用模拟带通或带阻滤波器测量方法 PAGEREF _Toc293307075 \h 6 1.5.2快速傅里叶变换理论 PAGEREF _Toc293307076 \h 7 1.5.3 瞬时无功功率理论 PAGEREF _Toc293307077 \h 8 1.5.4 神经网络理论 PAGEREF _Toc293307078 \h 9 1.5.5 小波变换理论 PAGEREF _Toc293307079 \h 9 1.6论文主要研究的内容和目标 PAGEREF _Toc293307080 \h 9 1.6.1 主要研究的内容 PAGEREF _Toc293307081 \h 9 1.6.2 目标 PAGEREF _Toc293307082 \h 10