光纤分布式声传感系统在GIS耐压测试中的应用  

Application of optical fiber distributed acoustic sensing system in GIS insulation withstand voltage test

作　　者：黄涛 孙恒东 蒋骏 王章轩 杨永前 陈金林 HUANG Tao;SUN Hengdong;JIANG Jun;WANG Zhangxuan;YANG Yongqian;CHEN Jinlin(Project Management Center,State Grid Jiangsu Electric Power Co.Ltd.Construction Branch,Nanjing 210000,China)

机构地区：[1]国网江苏省电力有限公司建设分公司项目管理中心,南京210000

出　　处：《激光技术》2023年第4期459-462,共4页Laser Technology

基　　金：国家电网有限公司科技基金资助项目(SGJSJSOOXMJS2100116)。

摘　　要：气体绝缘开关设备(GIS)在国家电网变电站建设领域应用广泛,通常在GIS设备投产之前需要做绝缘耐压试验,以对现场故障设备进行定位。为了进行更快速有效的定位,针对实际应用环境,利用分布式声传感系统(DAS)和相位敏感光时域反射仪,通过光纤自身的反向瑞利散射信号,进行多波长多路径调制解调,由光纤实时监测GIS管道的不同位置的振动信号,减少测试盲点。结果表明,所研制的DAS系统能够实现对GIS故障设备进行实时快速准确的定位,定位精度可达到3 m内。该研究对于GIS现场故障的及时排除和维修处理,保障电力设备安全运行具有较好的参考价值。Gas insulated switchgear(GIS)is widely used in the construction of State Grid Substations,and it is usually necessary to do insulation withstand voltage tests before GIS is put into production.To locate faulty equipment on site,according to the practical application environment,a fast and effective method was presented to locate the fault equipment in GIS insulation withstand voltage test by using distributed acoustic sensing(DAS)system.Through the back Rayleigh scattering signal of the optical fiber itself,the phase heterodyne was adopted phase-sensitive optical time-domain reflectometer(φ-OTDR)multi wavelength multi path modulation and demodulation method,which can visually and real-time monitor the optical fiber vibration signals at different positions of the metal shell of the GIS system to reduce the test blind spots.The experimental test results show that,fast and accurate positioning of fault equipment in GIS can be realized with the developed DAS system,and the positioning accuracy can reach within 3 m.It has a good reference value for timely troubleshooting and maintenance of GIS field faults and ensuring the safe operation of power equipment.

关 键 词：传感器技术 光纤分布式声传感系统 气体绝缘开关设备 耐压测试 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]