Teager-Kaiser能量算子Blackman-Harris窗三谱线插值的电压闪变参数检测

Flicker parameters detection using the Teager-Kaiser energy operator based on Blackman-Harris window and triple spectrum line interpolation

针对电压闪变的检测,提出了一种基于Teager-Kaiser能量算子和Blackman-Harris窗三谱线插值的闪变参数测量方法。采用能量算子检测出电压波动信号,分析Blackman-Harris窗的旁瓣特性,将闪变包络进行Blackman-Harris窗三谱线插值FFT谱分析与校正,对IEC标准推荐的检波方法进行简化,实现闪变参数的检测分析。通过大量仿真实验证明,在含有单一频率调制、多频率调制、电网基波频率发生偏移、含有谐波、间谐波和白噪声干扰时,文中的检测算法性能优良,相比传统检测方法,算法简单稳定、抗干扰性强,可实现电压闪变参数的在线检测。

For the detection of voltage flicker,a method for the detection of flicker parameters based on Teager-Kaiser energy operator and Blackman-Harris window triple spectrum line interpolation,is proposed in this paper.The voltage fluctuation signals are rapidly extracted by Teager-Kaiser operator,and the side lobe characteristics of Blackman-Harris window are analyzed.In order to realize the detection and analysis of voltage flicker parameters,voltage flicker measurement process based on the IEC standard is simplified,and the envelope based on Blackman-Harris window and triple spectrum line interpolation FFT is analyzed and corrected.A large number of simulation experiments show that the influences of a single frequency of modulating,multi-frequency of modulating waveform,the fluctuations of fundamental grid frequency,harmonics and inter-harmonics influences and white noise interference,are all overcome by this approach.Compared with some conventional methods,the detection algorithm of this paper has a good performance.This algorithm is simple,stable and strong anti-interference,which can realize the on-line detection of voltage flicker parameters.