用于变电站外破监测的Φ-OTDR系统高速数据采集设计及实现  

Design and realization of high speed data acquisition ofΦ-OTDR system for substation broken monitoring

作　　者：苏阳 李树东 刘明辉 黄慰 肖胜 熊伟 SU Yang;LI Shudong;LIU Minghui;HUANG Wei;XIAO Sheng;XIONG Wei(Baoshan Power Supply Bureau of Yunnan Power Grid co.LTD,Baoshan Yunnan 678000,China)

机构地区：[1]云南电网有限责任公司保山供电局,云南保山678000

出　　处：《激光杂志》2020年第11期158-161,共4页Laser Journal

摘　　要：针对大型变电站的安全监控和破坏预警问题,采用基于相位敏感型光时域反射原理(Φ-OTDR)的分布式光纤振动传感系统,融合FPGA与USB3.0技术开展传感数据的实时采集与高速传输,并通过实验分析了振动信号典型特征,进而实现变电站的外破实时监测。实验结果表明,实验室内已实现在总长20.78 km的传感光纤上进行振动信号的高速采集,并达到了小于20 m定位精度和高于10 d B的信噪比。该技术对于变电站的周界振动信号具备精细的定位精度,多点的定位能力和快速的响应时间。Aiming at the safety monitoring and damage warning of large-scale substations,a distributed optical fiber vibration sensing system based on phase-sensitive optical time domain reflection(Φ-OTDR)is adopted.The real-time acquisition of sensing data and the high-speed transmission are carried out by combining FPGA and USB3.0 technologies.The typical characteristics of vibration signal are analyzed through experiments,and then the real-time monitoring of substation broken is realized.The experimental results show that high-speed vibration signal acquisition on sensor fiber with a total length of 20.78 km has been realized in the laboratory,and the positioning accuracy is less than 20 m and the SNR is higher than 10 dB.This technology has fine positioning accuracy,multi-point positioning ability and fast response time for the peripheral vibration signal of substation.

关 键 词：Φ-OTDR FPGA 变电站监测 振动检测 USB3.0 

分 类 号：TN253[电子电信—物理电子学]