摘要
从小波函数的带通性质出发,利用小波变换在不同尺度下对非正弦电流信号进行检测,由此得出了它的基波和谐波分量及其有效值.通过重构基波分量与电源电压之间的相位差,求得了信号中的基波无功电流分量.为说明所提出检测方法的有效性,进行了相应的仿真研究,并讨论了影响检测精度的因素.
From the band-pass property of wavelet function, a non-sinusoidal current signal is detected based on wavelet transform under different scales, the fundamental and harmonic components in the signal and their RMSes are obtained thereby. The fundamental reactive current component is evaluated by the reconstruction of the phase difference between the fundamental component and the power source voltage. Appropriate simulation investigations are made to show the feasibility of the detection approach, and the factors affecting detection precision are discussed.
出处
《测试技术学报》
2007年第4期283-287,共5页
Journal of Test and Measurement Technology
关键词
电能质量
小波变换
谐波分量
无功分量
检测
power quality
wavelet transform
harmonic component
reactive component
detection
