摘要
针对暂态行波故障特征难于表达和提取 ,把小波变换应用于暂态行波故障特征刻划和描述 ,给出了电流行波、电压行波、正向方向行波和反向方向行波故障特征的小波变换模极大值表示 ;并对 4种行波的故障特征进行了初步分析和比较。行波的小波表示客观、全面、简单、明确地反映了不同行波分量的特点 ,为快速检测输电线路故障。
The fault characteristics of transient travelling waves are described using the dyadic discrets wavelet transform (DDWT) to present the travelling waves. Representations of DDWT modulus maxima are given for four kinds of travelling waves: voltage travelling waves, current travelling waves, forward and backward travelling waves. The magnitude of DDWT modulus maxima signifies magnitude of these travelling waves, and the polarity of DDWT modulus maxima signifies polarity of these travelling waves. The representation sets up a base for travelling waves analysis, fault detection, fault location and travelling waves based protection.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2001年第9期13-17,共5页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目 ( 5 0 0 770 11)
清华大学基础研究基金资助项目 ( JC2 0 0 0 0 2 1)
关键词
输电线路
行波
故障特征
二进小波变换
模极大值
transmission line
travelling waves
fault characteristic
dyadic discrete wavelet transform
modulus maxima
