基于多参量分布式光纤传感的架空输电线路风振监测分析

输电线路风振可能造成线路闪络、断股和金具疲劳损坏等故障，严重影响电力系统的安全稳定运行，准确和实时地监测线路的风振情况对灾害预警、故障排除和状态评估意义重大。为了解决传统风振监测手段维护困难、可靠性低等缺点，提出了一种基于多参量分布式光纤传感的输电线路风振监测装置。首先介绍了分布式光纤传感的基本原理和设备基本结构，然后利用数值仿真的方法分析了舞动和微风振动时线路的振动频率、幅值特征，论证了利用分布式光纤监测风振的可行性。实验证明，该装置能同时监测输电线路沿线各段的风振及线路内部应力变化情况，其60 km内的定位精度为±50 m，舞动及微风振动频率监测误差分别为0.07 Hz和0.01 Hz。该装置为架空输电线路的风振在线监测提供了新方法。

Analysis of transmission line wind vibration monitoring based on a multi parameter distributed optical fiber sensor

Wind vibration of transmission lines may cause line flashovers, broken stocks, and fatigue damage to fittings. This poses a great threat to the safe and stable operation of a power system. Accurate and real-time monitoring of wind vibration of lines is of great significance for disaster warning, troubleshooting and status assessment. To overcome the shortcomings of traditional monitoring methods, such as difficulty in maintenance and low reliability, this paper proposes a multi-parameter distributed optical fiber sensor-based wind vibration monitoring device for transmission lines. The numerical simulation method is used to analyze the vibration frequency of the line during galloping and breeze vibration and amplitude characteristics, demonstrating the feasibility of using distributed optical fiber to monitor wind vibration. Experiments show that the device can simultaneously monitor wind vibration and OPGW damage of various sections along the transmission line. The positioning accuracy within 60 km is ±50 m, and the monitoring errors of galloping and breeze vibration frequencies are 0.07 Hz and 0.01 Hz respectively. It provides a new method for wind vibration online monitoring of the transmission lines. This work is supported by the Science and Technology Project of China Southern Power Grid Co., Ltd. (No. GDKJXM20198377).