基于广义S变换的电压闪变检测法

Generalized S-Transform-based Voltage Flicker Detection

针对电压闪变信号提取不准确的问题,提出一种基于广义S变换的电压闪变检测法。通过引入α变量改变S变换窗函数的窗宽,局部调整S变换频域和时域测量精度,从而实现电压闪变精确检测。实验结果表明,与传统S变换方法相比,该方法准确率高,能更有效检测出电压闪变成分。

In view of the inadequate accuracy in the extraction of voltage flicker signals,this work tentatively proposed a generalized S-transform-based voltage flicker detection method.The method was designed to introduceαvariables to change the width of S-transform window function,and to locally adjust frequency and time resolution of S-transform,hence realizing accurate detection of voltage flicker.The proposed method was indicated by experiment to be superior in accuracy compared with the conventional S-transform method and competitive in effectively detecting voltage flicker.