| EMD方法在局部放电超声信号提取中的应用 |
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| 引用本文： | 张岗亭,王书振.EMD方法在局部放电超声信号提取中的应用[J].西安文理学院学报,2009,12(4):48-50. |
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| 作者姓名： | 张岗亭 王书振 |
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| 作者单位： | [1]西安文理学院计算机科学系,陕西西安710065 [2]西安电子科技大学计算机学院,陕西西安710071 |
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| 摘 要： | 变压器局部放电超声波定位中,首要任务是对超声波信号的提取,其准确性将直接影响到定位的实现.EMD方法可以将非线性、非平稳信号分解为不同频率成分的内禀模态函数,从而提取超声波信号.以山西省高压电气设备局部放电定位项目为背景,详细分析了EMD方法的原理、实现过程,并用实例测试仿真,验证了该方法的有效性与准确性.
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| 关 键 词： | EMD 内禀模态函数 局部放电 |
Application of the EMD Method in Extracting Ultrasonic Signals of Transformer Partial Discharge |
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| ZHANG Gang-ting,WANG Shu-zhen.Application of the EMD Method in Extracting Ultrasonic Signals of Transformer Partial Discharge[J].Journal of Xi‘an University of Arts & Science:Natural Science Edition,2009,12(4):48-50. |
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| Authors: | ZHANG Gang-ting WANG Shu-zhen |
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| Institution: | 1. Department of Computer Science, Xi＇ an University of Arts and Science, Xi＇ an 710065, China ; 2. School of Computer, Xidian University, Xi＇ an 710071, China) |
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| Abstract: | In the ultrasonic locating of transformer partial discharge, the most important is to extract the ultrasonic signals. Its precision directly affects the accuracy of the locating results. The empirical mode decomposition （EMD） method can decompose the nonlinear and non -stationary signals to intrinsic mode functions （IMF） with different frequencies, then the ultrasonic signals are extracted. Based on the project of high voltage instruments, the paper describes the EMD method algorithm, analyzes the de- tailed processing, and the simulated testing has showed the validity and accuracy of the method. |
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| Keywords: | EMD |
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