基于小波变换与αβ空间参数的单相接地选线方法的研究  

The Method Study of Selecting Line With Single Phase Grounded Fault Based on Wavelet and αβSpace Parameter

作　　者：张同洲[1] 

机构地区：[1]淮安供电公司,江苏省淮安市223003

出　　处：《电网技术》2006年第S2期308-310,共3页Power System Technology

摘　　要：本文提出一种基于小波变换与αβ空间参数提取小电流接地系统单相接地故障特征的方法来实现单相接地故障选线。利用小波变换对线路电流和电压的暂态信息进行处理,提取暂态量特征向量,利用clarke-concordia变换提取线路稳态电流的αβ空间参数构成稳态量特征向量,利用BP神经网络对这些特征向量进行处理,从而实现故障选线功能。仿真结果表明,这种方法可以大大地减少过渡电阻对故障选线的影响,使得选线结果准确可靠。the method picked up the characteristics of earthed fault based on wavelet transform and Clarke-concordia transform is studied in the paper, which is used to carried out to select earthed wire in substation. The wavelet transform is used to pick up the characteristic vector of the transient signal, and the Clarke-concordia transform is used to pick up the characteristic vector of the stable signal. The vectors is dealt by the BP Nerve Network to achieve select earthed wire function. The results show that the method can restrain the influence of the earthed resistance enormously.

关 键 词：小波变换 clarke-concordia变换 故障选线 单相接地故障 

分 类 号：TM862[电气工程—高电压与绝缘技术]