摘要
为了研究超宽频带局部放电信号在各个频段上的局部特征、发现特征频段 ,应用小波分析技术 ,将局部放电信号进行小波包分解 ,使信号变为各个频段的信号 ,然后计算各个频率段信号的分维数 ,并通过分维数的变化 ,来量化分析信号特征峰的特征 .应用这种方法 ,可以得到各频段的放电信号的分形特征 。
In order to analyze the characteristics of ultra wideband partial discharge signals in different frequency band and to find the characteristic frequency band, an ultra wideband partial discharge signal is decomposed into different frequency components based on wavelet analysis, then the fractal dimensions of the discharge signal in each frequency band is calculated, and the characteristics of the partial discharge signals can be expressed in numerical quantities with fractal dimensions. By the method, the fractal characteristics of ultra wideband partial discharge signals in different frequency band can be obtained, which can lay the foundation of further study on the variation law of ultra wideband partial discharge signals.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2002年第6期551-554,共4页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目 (5 0 0 770 14 ) .
关键词
超宽频带局部放电
小波包分解
特征频段
分形分析
ultra wideband partial discharge
wavelet packet analysis
characteristic peak
fractal analysis
