基于分布式温度应力监测的光纤复合架空相线结构

Optical Fiber Composite Overhead Phase Line Structure Based on Distributed Temperature Stress Monitoring

设计了基于分布式温度应力监测的光纤复合架空相线结构,以布里渊光纤传感器在线实时监测相线结构运行状态,并详细分析了现场应用测量结果。结果表明在光纤复合架空相线结构无负载电流时,温度相对偏低,且分布不均匀;而在添加负载电流时,全过程温度综合升高,且分布更不均匀,即使忽视突变尖峰,通电之后相线结构温度分布依旧存在较大起伏;布里渊光纤传感器可真实反映光纤复合架空相线结构全过程温度分布形态,还可全面实时监测温度过热位置;在无负载电流时,出现了5处应变异常位置,其他位置并未发生明显应变;而在添加负载电流时,应变分布状况变得更加复杂,出现了更多新的应变异常位置,然而既有2处应变异常位置恢复了正常状态;布里渊光纤传感器可全过程在线监测光纤复合架空相线结构的应力应变状态。

The design based on the distributed temperature stress monitoring of optical fiber composite overhead line structure,with brillouin fiber optic sensor on-line real-time monitoring on line structure running state,the measurement results and field application is analyzed in detail.The results show that the temperature is relatively low and the distribution is not uniform when there is no load current in the fiber composite overhead phase line structure.However,when the load current is added,the temperature of the whole process increases comprehensively and the distribution is more uneven.Even if the abrupt peak is ignored,the temperature distribution of the phase line structure still has a large fluctuation after electrization.The brillouin fiber optic sensor can reflect the temperature distribution of the whole process of the optical fiber composite overhead phase line structure,and can monitor the overheating position in real time.When there is no load current,5 abnormal strain positions appear,and no obvious strain occurs in other positions.When the load current is added,the strain distribution becomes more complex,and more new strain abnormal positions appear.However,two strain abnormal positions recover to normal state.The brillouin fiber sensor can monitor the stress and strain state of optical fiber composite overhead phase line.