基于包络线和函数拟合的录波数据分析  

Analytical Study of Fault Recording Data Based on Envelopes and Function Fitting

作　　者：曹炜[1] 王永生[1] 丁北平[1] 张文青[1] 

机构地区：[1]上海电力学院电力与自动化工程学院,上海200090

出　　处：《上海电力学院学报》2010年第4期315-318,326,共5页Journal of Shanghai University of Electric Power

基　　金：国家自然科学基金(50907039)

摘　　要：提出了一种基于包络线和函数拟合来分析短路电流录波数据的实用算法.首先对短路电流录波波形取包络线,利用指数函数拟合,滤除衰减直流分量;然后对周期分量取包络线,通过指数函数拟合来分析短路电流衰减基波分量,最终实现对暂态短路电流基波分量有效值时域内的多分辨率观察与研究.A practical method based on envelopes and function fitting to analyze short-circuit current fault recording data is proposed.Firstly,the short-circuit current recording wave is enveloped and the midline of the envelopes is fitted with the exponential function,which can be used to filter out the decaying DC component from the recording wave;secondly,the AC component is enveloped and the midline of the envelopes is fitted with the exponential function which can be used to present the decaying power frequently RMS of the short-circuit current.As a result,multi-resolution observation in the time domain for the power frequency component is realized.

关 键 词：短路电流 录波数据 包络线 函数拟合 

分 类 号：TN911.72[电子电信—通信与信息系统]