摘要
由于 Fourier变换缺乏时域局部化的能力 ,影响了直接利用 Fourier变换通过电压、电流波形波动量估计系统谐波阻抗的准确度。文中利用小波变换时 -频局部化分析的特点 ,运用复小波对信号同步分层 ,分层后信号突出了电压、电流的波动情况 ,再应用“波动法”估计谐波阻抗。
The veracity of assessing harmonic impedance by fluctuations of voltage and current waveform merely by use of the Fourier transform is reduced, for the Fourier transform lacks the ability to perform a time frequency analysis. This paper presents a method that is based on synchronously layered distortion waveforms with complex wavelet transform, which can make the harmonic fluctuations more distinct, before assessing the harmonic impedance with the fluctuations method. The results of application both in an experimental circuit and in a practical case have shown that this method is effective.
出处
《电力系统自动化》
EI
CSCD
北大核心
2003年第9期41-44,共4页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目 (5 0 1770 2 1)
四川省应用基础研究基金资助项目 (0 1GY0 5 1- 4 1)
