摘要
电气化铁路机车运行特点给供电系统电能质量带来了谐波挑战。分析了电气化铁路谐波特点以及电气化铁路谐波检测原理,并在小波变换检测方法的基础上,提出了带支路补偿的改进方案。为消除小波变换分解与重构中间环节的频率混叠问题,构建了两级混叠补偿的小波变换环节。最后基于Matlab 2013a软件搭建了仿真分析模型,并与依据信号独立分量的分析方法进行了对比,验证了该改进方法的有效性。
The running characteristics of electrified railway locomotive bring harmonic challenge to power quality of power supply system. This paper analyzes the harmonic characteristics of electrified railway and the harmonic detection principle of electrified railway. Based on the wavelet transform detection method, an improved scheme with branch compensation is proposed. In order to eliminate the problem of frequency aliasing in the middle link of wavelet decomposition and reconstruction, a two-level aliasing compensation wavelet transform link is constructed. Finally, the simulation analysis model is built based on MATLAB 2013 a software, and compared with the analysis method based on signal independent component, which verifies the effectiveness of the improved method.
作者
康海军
KANG Hai-jun(China Railway Construction Electrification Bureau Group Co.,Ltd.,Beijing 100043)
出处
《新型工业化》
2019年第12期12-16,共5页
The Journal of New Industrialization
关键词
电气化铁路
谐波检测
小波变换
两级补偿
Electrified railway
Harmonic detection
Wavelet transform
Two-stage compensation
