利用电磁辐射信号的串并联电弧故障检测  

Series and Parallel Arc Fault Detection Using Electromagnetic Radiation Signal

作　　者：丁浩江[1] 张认成[1] 杨凯[1] 杨建红[1] 陈首虹[1] 

机构地区：[1]华侨大学机电及自动化学院,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2015年第2期132-136,共5页Journal of Huaqiao University(Natural Science)

基　　金：福建省高校产学合作科技计划重大项目(2012H6013);福建省厦门市科技计划资助项目(2014S0045);福建省泉州市科技计划资助项目(2014Z114)

摘　　要：针对电弧故障检测过程中的漏判问题,提出一种新的检测方法.通过电容耦合方式获取电弧故障产生的电磁辐射信号,采用对数放大器压缩其动态范围以增加小幅值电弧故障辐射信号的增益,经电平比较器将放大器输出转换为电平脉冲,最终根据电平脉冲宽度的特性实现电弧故障的检测.样机研制和测试结果表明:该方法对串联和并联电弧故障都具有较为理想的检测精度,适应于串、并联电弧的检测.In order to resolve the missing judgement in detecting arc fault,a new detecting method is put forward in this paper.The electromagnetic radiation signal radiated by arc fault is obtained through a capacitive coupling method,aimed at increasing the gain of the radiation signal radiated by arc fault of low amplitude,a logarithmic amplifier is applied to compress the radiation signal,the output of the amplifier is processed into pulse signal via a comparator.Finally,the detection of arc fault is achieved according to the characteristics of the width of pulse signal.Prototype development and test result show that this method has an ideal detecting precision for both series arc fault and parallel arc fault,it is suitable for both series and parallel arc fault detection.

关 键 词：电弧故障 串、并联 电磁辐射 对数放大器 

分 类 号：TM930.12[电气工程—电力电子与电力传动]