| 基于CL多小波及SPIHT编码的电力系统故障录波数据压缩算法 |
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| 引用本文： | 王学伟,王丽君.基于CL多小波及SPIHT编码的电力系统故障录波数据压缩算法[J].电测与仪表,2009,46(9). |
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| 作者姓名： | 王学伟 王丽君 |
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| 作者单位： | 北京化工大学信息科学与技术学院,北京,100029 |
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| 摘 要： | 针对电力系统故障录波数据的存储和传输问题,提出了基于CL多小波和多级树集合分裂SPIHT(SetPartitioned in Hierarchical Tree)编码的数据压缩方法.首先对故障录波数据进行CL多小波变换,然后对变换以后的系数进行一维SPIHT编码,对得到的排序位流再进行算数编码.实验结果表明该算法在压缩比为8.2907%时,均方误差为0.4544%,信噪比达46.8504,同时该算法可以根据需要自由控制压缩比,实现了可变码率,在应用中可得到满意的压缩效果.
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| 关 键 词： | CL多小波 SPIHT编码 电力系统 数据压缩 |
Compression Algorithm of Fault Recording Data in Power System Based on CL Multiwavelet and SPIHT Coding |
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| WANG Xue-wei,WANG Li-jun.Compression Algorithm of Fault Recording Data in Power System Based on CL Multiwavelet and SPIHT Coding[J].Electrical Measurement & Instrumentation,2009,46(9). |
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| Authors: | WANG Xue-wei WANG Li-jun |
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| Affiliation: | WANG Xue-wei,WANG Li-jun (College of Information Science & Technology,Beijing University of Chemical Technology,Beijing 100029,China) |
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| Abstract: | For power system fault recording data memory and transmission,a new method of data compression based on CL multiwavelet and Set Partitioned in Hierarchical Tree (SPIHT)coding is presented.Firstly,CL multiwavelet transform is employed to decompose the fault recording data. Then,SPIHT coding method is used for coefficients after CL multiwavelet transform,Arithmetic coding is employed to order bit-stream. The experimental results demonstrate that the mean square error is 0.4544% and the ratio of signal and noi... |
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| Keywords: | CL multiwavelet SPIHT coding power system data compression |
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