基于相邻光栅传感器模态分解的配电网线路异常振动监测  

Abnormal Vibration Monitoring for Distribution Network Lines Based on Modal Decomposition of Adjacent FBG Sensors

作　　者：孙萌 刘翔宇 张东 于丰 李超杰 张柳 唐玥彤 SUN Meng;LIU Xiang-yu;ZHANG Dong;YU Feng;LI Chao-jie;ZHANG Liu;TANG Yue-tong(Fengxian Power Supply Branch of State Grid Jiangsu Electric Power Co.,LTD.,Xuzhou 221000,China;School of Mechanical and Electrical Engineering,China University of Mining and Technology,Xuzhou 221000,China)

机构地区：[1]国网江苏省电力有限公司丰县供电分公司,江苏徐州221000 [2]中国矿业大学机电工程学院,江苏徐州221000

出　　处：《光学与光电技术》2024年第5期56-62,共7页Optics & Optoelectronic Technology

摘　　要：基于低反射率光栅构建配电网档距内分布式异常振动监测阵列,对相邻传感器解调后的相位信号分别做模态分解,再将各模态函数通过希尔伯特变换构建空间尺度的动态检测特征值,当特征值分布状态发生较大波动时,实现快速准确定位异常振动位置及特征.结果表明,所提方法能够快速实现异常振动特征提取,有效监测到了 0.5 s周期的异常振动事件发生,因此在配电网线路监测方面具有一定应用价值.In this paper,the distributed abnormal vibration monitoring array in the distribution network is constructed based on the low reflectivity grating,and the phase signals demodulated by adjacent sensors are decomposed respectively.Then,the dynamic detection eigenvalues of spatial scale are constructed by the Hilbert transform of each mode function.When the distribution of eigenvalues fluctuates greatly,the abnormal vibration location and characteristics can be quickly and accurately located.The results show that the proposed method can quickly extract abnormal vibration features and effectively monitor the occurrence of abnormal vibration events with a period of 0.5 s,so it has certain application value in the monitoring of distribution network lines.

关 键 词：光栅传感阵列 配电网 异常振动 模态分解 分布式监测 

分 类 号：TN913.3[电子电信—通信与信息系统]