摘要
针对暂态保护的关键问题——暂态行波故障特征提取,把小波变换应用于暂态行波故障特征的提取。给出了应用小波变换提取行波故障特征的方法和步骤,并对电压和电流行波的故障特征进行了初步分析和比较。用小波能够简单明确的反映行波分量的特点,从而可以有效的提取故障信息。为基于暂态行波特征的暂态保护及故障测距奠定了基础。
The abstract of the fault characteristics of transient travelling waves is difficult, this paper adopts wavelet transform to describe kinds of fault information. The method and process of the abstraction of the travelling wave with wavelet transform are given. The characteristics of voltage and current travelling waves are analyzed and compared. The matlab simulation results indicate that this method is simple and clear. This method provides the basis of transient protection, fault detection and fault location which base on travelling wave.
出处
《电气开关》
2008年第5期44-47,共4页
Electric Switchgear
关键词
输电线路
暂态保护
行波提取
小波变换
transmission line
transient protection
travelling wave
wavelet transform
