一种低压故障电弧检测的FFT判定方法

A FFT-based Low-voltage Arcing Fault Detection Method

介绍国内外故障电弧判定以及检测的研究现状,测定线性负载与非线性负载在正常状态与故障电弧发生状态下的电流信号特征,并通过快速傅里叶变换(FFT)将电流信号变换到频域进行分析,提出一种判定负载是否产生故障电弧的较为准确的方法:线性负载发生故障电弧时幅值变化率大于1,非线性负载发生故障电弧时电流幅值变化率小于1。

This paper describes the determination and research about arc fault detection both at home and abroad;besides,it measures current signal characteristics of linear and nonlinear load under normal and arc fault states.Current signal is analyzed in frequency domain by using fast Fourier transform（FFT） algorithm,and an accurate arcing fault detection method is proposed：in case of arcing fault,the magnitude change rate of liner load is greater than 1 while the magnitude change rate of non-linear load is smaller than 1.