基于广义S变换的电压闪变检测法  

Generalized S-Transform-based Voltage Flicker Detection

作　　者：吴启宇 张安婷 俞明 WU Qiyu;ZHANG Anting;YU Ming(Nanjing Lishui District Power Supply Branch of State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 211200,China;Nanjing Sanxin Power Supply Service Co.,Ltd..Lishui Branch,Nanjing 211299,China)

机构地区：[1]国网江苏省电力有限公司南京市溧水区供电分公司,江苏南京211200 [2]南京三新供电服务有限公司溧水公司,江苏南京211299

出　　处：《电工技术》2024年第21期88-91,共4页Electric Engineering

摘　　要：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.

关 键 词：电压闪变 广义S变换 窗函数 闪变检测 

分 类 号：TM712[电气工程—电力系统及自动化]