摘要
介绍基于多分辨分析的Mallat快速小波分解算法。讨论了EHV输电线路故障电弧及产生的暂态电流的特点和单端量电流暂态保护基本原理 ,利用小波分析的去噪和时频局部化特性 ,建立了基于多分辨分析的单端量电流暂态保护启动判据和跳闸判据。借助EMTDC仿真分析软件 ,研究一实际电网EHV输电线路故障电弧特点 ,探讨了单端量电流暂态保护机理的可行性。
Mallat fast decomposition algorithm based on multi resolution analysis is introduced. The character of EHV transmission line fault arc and its transient current is discussed, and the principle of non unit current transient protection is studied. Based on the time frequency localization and de noise character of wavelet transform, a new non unit current transient protection criterion based on multi resolution analysis is established. By the simulative analysis software of EMTDC, the fault arc character of a real EHV transmission line is studied and the feasibility of non unit current transient protection discussed.
出处
《电力自动化设备》
EI
CSCD
北大核心
2002年第2期16-19,共4页
Electric Power Automation Equipment
关键词
输电线路
电流暂态保护
EHV
继电保护
多分辨分析
multi resolution analysis
mallat algorithm
transient protection
protection criterion
