基于Mallat算法的飞机电网谐波检测系统

随着电力电子技术的广泛应用,谐波对飞机电网的污染越来越严重,检测、分析和抑制谐波已经成为重要的课题。小波变换具有时-频局部化特性,在电力系统的分析中具有广阔的应用前景。为实现对飞机电网谐波的快速检测、分析,将小波变换方法应用于飞机电气系统谐波检测中,提出了基于Mallat快速算法的谐波检测系统设计方案。实验结果表明,系统采用小波补偿的改进FFT算法进行谐波分析,可以将信号中不同频率的谐波快速有效地提取出来,并进行有针对性的分析,提高了谐波检测效率。

Harmonic Test System for Aircraft Power System Based on Mallat Algorithm

As the application of power- electron technology widely, the harmonic pollution is more and more serious to aircraft power system. The detection, the analysis and the control to harmonic has been an important subject for the power system. Wavelet transform has the characteristic of time- frequency localization and has been applied widely in electric power systems. In order to detect and analysis the harmonic of aircraft electrical power system, the design of harmonic test system for aircraft power system based on Mallat Algorithm is proposed. The testing result show that the harmonics with different frequencies can be separated from the sampled signal and be analyzed pertinently by adopting a new FFT algorithm based on wavelet transform to analysis harmonic. The test efficiency is improved.