基于小波变换模极大值与奇异点的短时电压变动实时检测  

Real-time detection of short duration voltage variation based on model maximum and singularity of wavelet transform

作　　者：刘承员 粟渊恺[2] 刘桂英[2] 

机构地区：[1]惠州市新科创工程建设监理有限公司 [2]长沙理工大学电气与信息工程学院

出　　处：《电力科学与技术学报》2009年第1期81-87,共7页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(50677058);湖南省教育厅科研项目(08C089)

摘　　要：介绍了短时电压变动的小波检测方法,分析了小波变换模极大值与原始信号奇异点的对应关系、噪声的小波变换固定阀值消除原理,提出了短时电压变动实时检测的实现过程,并完成仿真验证.仿真结果表明:该检测方法不受噪声干扰,实现短时电压变动发生时间的精确检测.The detection method of short duration voltage variations with wavelet transform is introduced, relations between wavelet transform model maximum and original signals singularity and the wavelet transform based noise elimination principium with fixed threshold are analyzed in this paper. The real-time detecting process of short duration voltage variations is proposed, and simulations are carfled out. Results show that the proposed method can eliminate noise influence, and detect the times of short duration voltage variations accurately and efficiently.

关 键 词：短时电压变动 小波变换 模极大值 奇异性 

分 类 号：TM711[电气工程—电力系统及自动化]