摘要
将短时傅里叶变换(STFT)的联合时频分析方法应用于特快速暂态过电压(VFTO)的研究中,分析并处理了典型的VFTO波形.仿真结果表明,联合时频分析可以同时给出特快速暂态过电压随时间和频率的变化特性,一方面可以对VFTO在时域或频域里的分析结果进行验证,另一方面可以得到更多的VFTO信号特征.
The time-frequency analysis method based on short time fourier transform（STFT） is presented.Experimental results show that the time-frequency analysis of VFTO signal based on short time fourier transform details on the time-frequency plane,and it can also reflect the characteristics of time and frequency accurately of the VFTO signal.The results can meet the requirements of choosing suitable parameters,and it also offers a kind of new method for VFTO signals.It is effective and accurate for obtaining the details of very fast transient overvoltage signal.
出处
《河北师范大学学报（自然科学版）》
CAS
北大核心
2013年第4期369-372,共4页
Journal of Hebei Normal University：Natural Science
基金
河北省自然科学基金(E2012208006)
河北省教育厅高等学校科学研究计划(ZH2011243
Y2012018)
关键词
短时傅里叶变换
联合时频分析
特快速暂态过电压
仿真分析
short time fourier transform（STFT）
time-frequency analysis
very fast transient overvoltage signal
simulation method
