摘要
主要讨论了解决零模行波波头定位的问题。由于零模衰减严重 ,波头比较光滑 ,因而使用离散小波变换无法定位零模波头。文中将连续小波变换应用于定位零模波头中。在理论分析的基础上 ,得出了利用连续小波变换定位零模波头时小波基和小波变换尺度的选择原则。利用该原则的小波变换可以有效地定位零模波头。EMTP仿真证明了利用基于该原则的小波变换可以准确定位零模波头。
The main aim of this paper is to deal with location measurement of modal zero travelling wave front. Modal zero composition attenuate rigorously and the front is smooth, so it is impossible for discrete wavelet transform to be used to locate modal zero wave front. This paper discusses the application of continuous wavelet transform to locate modal zero wave front and obtains the principle of wavelet basis and scale selection based on theoretical analysis. Using the principle to locate modal zero wave front is effective from theoretical point of view. The result of EMTP further proves the principle reliable and location accurate.
出处
《电力系统自动化》
EI
CSCD
北大核心
2002年第12期54-58,共5页
Automation of Electric Power Systems
关键词
连续小波变换
电力系统
行波
奇异性检测
continuous wavelet transform (CWT)
singularity measurement
wavelet analysis
