摘要
小波分析 (或称小波变换 )是一种新的时频分析方法 ,它具有良好的时频局部化特性 ,适用于电力系统故障分析。在对中性点不接地系统中由单相接地故障激发的铁磁谐振全过程进行仿真的基础上 ,分析了中性点电压的特点 ,从多个方面考察了小波变换用于铁磁谐振检测的一些问题 ,最后用二进小波变换具体进行了分析。仿真分析结果表明 。
Wavelet analysis, also called wavelet transform,is a new analysis method with good time frequency localization characteristic, so it is suitable for fault analysis of power system. On the basis of overall simulation of ferromagnetic resonance occurred in neutral point unearthed system, which is excited by single phase grounding fault, the character of voltage at neutral point is analyzed and some problems on applying wavelet analysis to the detection of ferromagnetic resonance are inspected in several aspects. Finally, with binary wavelet transform the ferromagnetic resonance process is analyzed. Simulation results show that with wavelet transform the occurrence of ferromagnetic resonance can be detected and the frequency resonance can also be determined.
出处
《电网技术》
EI
CSCD
北大核心
2001年第11期55-57,61,共4页
Power System Technology
