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| 摘要: |
| 三角样条小波TSW（Trigonometric Spline Waelet)是作者首先提出适合电力系统信号处理的小波函数，它是对称的半正交小波。基于它的小波包称为半正交小波包，与Daubechies小波迭代算法不同，三角样条小波是对称的或反对称的小波，基于它的滤波器具有线性相位或广义线性相位，因而可避免信号相位失真，实验结果表明半正交小波包对故障信号的分解，压缩，重构比Daubechies小波包效果明显，另外对故障信号的小波包分解的不同频带的特征值和正常信号的特征值进行比较，可以对故障信号进行谐波检测和定位。 |
| 关键词: 半正交三角样条小波包 电机 故障信号处理 电力系统 信号分解 信号重构 Daubechies小波包 故障检测 |
| DOI： |
| 分类号:TM711 TM307.1 |
| 基金项目:国家自然科学基金项目(50077008) |
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| Fault signal processing based on semi-orthogonal trigonometric spline wavelet packet |
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HU Guo-sheng 1 2 REN Zhen 2
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| Abstract: |
| Trigonometric spline wavelet,being suitable for processing the fault signals of electric power systems ,is presented,which is a symmetrical and semi-orthogonal wavelet.The wavelet packet based on trigonometric spline wavelet is called semi -orthogonal wavelet packet,different from Daubechies wavelet using iterating.Trigonometric splin e wavelet is symmetric or anti-symmetric,and its filter has characteristics of linear phase or generalized linear phase,so it can prevent phase distortion of signal.Emulation shows that the semi-orthogonal wavelet packet is more effective than Daubechies wavelet packet in the decomposition,compression and reconstruction of fault signal.By comparing the characteristics of fault signal and normal signal in different frequency bands,the fault signal harmonics can be detected accurately.This project is supported by National Natural Science Foundation of China(NO.50077008). |
| Key words: trigonometric splin e wavelet,semi-orthogonal wavelet packet,Daubechies wavelet packet,fault detection,decomposition and reconstruction |
