一种基于Prony和Hilbert变换的瞬时电压闪变检测的改进方法  

An advanced method for detection of instantaneous voltage flicker based on Prony analysis and Hilbert transform

作　　者：韩松[1] 荣娜[1] 阮征 许逵[1] 郜晓娜[1] 

机构地区：[1]贵州大学电气工程学院,贵阳550003 [2]南方电网贵阳市供电局,贵阳550001

出　　处：《电测与仪表》2007年第8期11-14,共4页Electrical Measurement & Instrumentation

基　　金：贵州大学大学生研究资助项目(SRT2006073)

摘　　要：本文简要分析了电压波动和闪变的成因,提出了一种基于Prony Analysis时频分析(PA)和Hilbert Tansform变换(HT)的瞬时电压闪变检测的改进方法。该算法可以从实际电网非平稳信号中准确地检测电压包络线,从而获得表征瞬时电压闪变严重程度的定量信息。两个数值仿真算例说明了这种方法的有效性。This paper briefly analyzes the cause of voltage fluctuates and flickers in the power delivery system, and presents an advanced method for the detection of the instantaneous flicker level based on Prony Analysis and Hilbert Transform. By using this algorithm, the envelope of voltage is extracted from the non-stationary signal in the actual power system, and the quantified information of the Instantaneous Flicker Level is acquired for power quality evaluation. Two cases testify the effectiveness of the technique by numerically simulating.

关 键 词：瞬时电压闪变 PRONY方法 Hilbea变换 间谐波 电能质量 

分 类 号：TM712[电气工程—电力系统及自动化]