摘要
Hilbert-Huang变换(HHT)以经验模态分解(empirical mode decomposition,EMD)为理论基础,尤其适用于强干扰背景下的瞬时有用信号的提取。本文以某10 kV电力母线谐波实测数据为基础,研究HHT在谐波电流分析中的应用。对10 kV电力母线谐波电流信号应用EMD分解得到的固有模态函数IMF(Intrinsic Mode Function),与小波分析结果相比较表明,HHT能够从复杂的背景谐波中获得较为理想的无畸变谐波信号。
By Hilbert-Huang Transform（HHT） based on the empirical mode decomposition（EMD）,the instantaneous effective signal can be obtained from the strong harmonic perturbation.The actual data of harmonic currents of 10kV power system has been analyzed according to HHT in this paper.Above harmonic current was decomposed by EMD and IMF.The results of comparing HHT with wavelet show that,HHT can obtain ideal smooth waveform from complex harmonic currents.
出处
《节能技术》
CAS
2007年第5期403-405,共3页
Energy Conservation Technology
