| 基于小波包变换的电力系统谐波分析 |
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| 引用本文： | 唐忠,焦婷. 基于小波包变换的电力系统谐波分析[J]. 电测与仪表, 2016, 53(18): 57-62. DOI: 10.3969/j.issn.1001-1390.2016.18.011 |
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| 作者姓名： | 唐忠 焦婷 |
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| 作者单位： | 上海电力学院电气工程学院,上海,200090 |
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| 基金项目： | 江苏省电力公司科技项目(H2015－051) |
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| 摘 要： | 由于新能源的广泛应用和电力电子设备的迅速增长,电力系统谐波越来越被关注,精确有效的谐波分析方法研究具有实际意义。基于小波包变换的良好局部性,小波包变换广泛应用于谐波分析,重点分析了小波函数的选取和分解层数的确定。通过仿真,得到了基于小波包变换谐波分析方法的最优小波函数与分解层数:选用小波函数sym35对谐波信号进行5层分解,得到的谐波分析结果通常是比较理想的。
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| 关 键 词： | 谐波分析 小波包变换 小波函数 均匀频带划分 |
| 收稿时间： | 2015-05-28 |
| 修稿时间： | 2015-06-23 |
Power system harmonic analysis based on wavelet packet transform |
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| Tang Zhong and Jiao Ting. Power system harmonic analysis based on wavelet packet transform[J]. Electrical Measurement & Instrumentation, 2016, 53(18): 57-62. DOI: 10.3969/j.issn.1001-1390.2016.18.011 |
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| Authors: | Tang Zhong and Jiao Ting |
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| Affiliation: | School of Power and Automation Engineering,Shanghai University of Electric Power,School of Power and Automation Engineering,Shanghai University of Electric Power |
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| Abstract: | For the wide application of new energy and the rapid growth of power electronic equipment , more and more attention are paid to power system harmonic , so research on accurate and efficient harmonic analysis method has prac-tical significance.Based on the good locality of the wavelet packet transform (WPT), WPT is widely applied in har-monic analysis .In this paper , we focus on the selection of wavelet function and confirmation of decomposition level . The simulation shows the best wavelet function and decomposition level , and we can come to a conclusion that the har-monic analysis effect is best when using wavelet function sym 35 and decomposing in five levels . |
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| Keywords: | harmonic analysis WPT wavelet function uniform frequency sub-band division |
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