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
孙萌 1刘翔宇 1张东 1于丰 1李超杰 1张柳 2唐玥彤1
作者信息
- 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
- 折叠
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.
Abstract
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Key words
fiber Bragg rating sensing array/distribution network/abnormal vibration/modal decomposition/distributed monitoring引用本文复制引用
出版年
2024
NETL
NSTL
万方数据