摘要
传统在线仪器存在电压波动与闪变信号计算精度较差的问题,究其原因是其算法存在频谱泄漏和栅栏效应。文章采用小波变换对电压波动与闪变信号进行计算分析,并通过小波变换和FFT计算短时闪变严重度Pst的对比试验效果,表明小波变换在电压波动与闪变分析计算方面的优越性。
The traditional online instruments experience a low accuracy in calculating voltage fluctuation and voltage flicker signals because the calculation algorithm to calculate the voltage fluctuation and flicker signals has spectrum leakage and fence effect. This paper uses wavelet transform to calculate and analyze the voltage fluctuation and flicker signals,and validates the advantage of the wavelet transform method in the calculation by means of comparison between the short time flicker severity Pst by using wavelet transform and the one by using FFT.
出处
《青海电力》
2016年第1期1-4,26,共5页
Qinghai Electric Power
关键词
电压波动与闪变
小波变换
短时闪变严重度Pst
voltage fluctuation and flicker
wavelet transform
short time flicker severity
