| 剔除奇异点的电网谐波分析方法研究 |
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| 引用本文： | 郝丽丽,徐群. 剔除奇异点的电网谐波分析方法研究[J]. 电力系统保护与控制, 2005, 33(6): 1-5 |
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| 作者姓名： | 郝丽丽 徐群 |
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| 作者单位： | 1. 南京工业大学自动化学院,江苏南京210009;2. 河海大学电气工程学院,江苏南京210000 |
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| 摘 要： | 随着电力系统中非线性负荷的不断增加,电网中的谐波干扰也越来越复杂,需要对其进行监测和分析,进而提出具体的治理方案。该文介绍了一种基于小波变换和快速傅里叶变换相结合分析谐波信号的方法。用小波变换监测并剔除信号的奇异点,对由小波变换得到的低频信号用快速傅里叶变换进行频谱分析,并与传统的谐波分析方法进行仿真比较,取得了较满意的结果。
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| 关 键 词： | 谐波监测 快速傅里叶变换 小波变换 奇异 |
| 文章编号： | 1003-4897(2005)06-0001-05 |
| 修稿时间： | 2004-07-12 |
Study of detecting power harmonic by eliminating singular point |
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| HAO Li-li,XU Qun .Automation College,Nanjing University of Technology,Nanjing ,China, .School of Electrical Engineering,Hohai University,Nanjing ,China). Study of detecting power harmonic by eliminating singular point[J]. Power System Protection and Control, 2005, 33(6): 1-5 |
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| Authors: | HAO Li-li XU Qun .Automation College Nanjing University of Technology Nanjing China .School of Electrical Engineering Hohai University Nanjing China) |
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| Affiliation: | HAO Li-li~1,XU Qun~2 1.Automation College,Nanjing University of Technology,Nanjing 210009,China, 2.School of Electrical Engineering,Hohai University,Nanjing 210000,China) |
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| Abstract: | With the increasing of non-linear load in power system, harmonic interference has become more and more complicated. To monitor and detect it, detained analysis and accurate measurement of harmonics are needed. An approach to analyze harmonic signal based on wavelet transform and Fast Fourier Transform(FFT) is described. It detects and eliminates singular point with wavelet transformation, and analyses the low frequency signal,which got from the wavelet transform by Fast Fourier Transform. Compared with traditional harmonic analysis method by computer simulation, it has a satisfactory result |
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| Keywords: | harmonic monitor FFT wavelet transform singularity |
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