| 自适应阈值多小波故障暂态信号去噪方法 |
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| 引用本文： | 刘志刚,钱清泉.自适应阈值多小波故障暂态信号去噪方法[J].系统工程与电子技术,2004,26(7):878-880. |
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| 作者姓名： | 刘志刚 钱清泉 |
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| 作者单位： | 西南交通大学电气化自动化研究所,四川,成都,610031 |
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| 基金项目： | 国家自然科学基金 ( 5 99770 19)，四川省应用基础研究项目基金 ( 0 2GY0 2 9-0 3 9)资助课题 |
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| 摘 要： | 在介绍多小波基本理论的基础上 ,探讨了基于多小波的信号去噪方法。针对目前多小波去噪方法的不足 ,提出一种基于自适应阈值的多小波去噪方法 ,应用于电力系统输电线故障暂态信号的去噪 ,并与基于传统阈值多小波和小波的去噪效果进行了比较。仿真结果表明 ,该方法可以根据实际信号自适应改变阈值大小 ,在去噪效果上优于传统多小波去噪方法。
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| 关 键 词： | 信号去噪 多小波 自适应阈值 |
| 文章编号： | 1001-506X(2004)07-0878-03 |
| 修稿时间： | 2003年6月23日 |
Adaptive shrinkage value de-noising method of fault transient signals with multiwavelets |
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| LIU Zhi-gang,QIAN Qing-quan.Adaptive shrinkage value de-noising method of fault transient signals with multiwavelets[J].System Engineering and Electronics,2004,26(7):878-880. |
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| Authors: | LIU Zhi-gang QIAN Qing-quan |
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| Abstract: | Based on the basic theory of multiwavelet, the multiwavelet de-noising methods are discussed. After the analysis of traditional method, an adaptive shrinkage value de-noising method based on multiwavelet is proposed. This method is adopted in fault transient signal de-noising of power transmission lines, and its de-noising effect is compared with the traditional multiwavelet and wavelet methods. The simulation results indicate that the shrinkage value changeds adaptively with signals, and the de-noising effect is better than that of the traditional method. |
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| Keywords: | signal de-noising multiwavelet adaptive shrinkage value |
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