基于COMSOL Multiphysics的OPGW耐雷性能分析与仿真

Analysis and Simulation of OPGW Lightning Protection Based on COMSOL Multiphysics

为了研究光缆结构的改变对光纤复合架空地线(optical fiber composite overhead ground wire, OPGW)雷击断股的影响,应用COMSOL Multiphysics软件对其雷击点局部进行仿真,通过施加不同大小的雷击电流A、B、C分量以及改变架空地线的结构,对光纤复合架空地线进行雷击断股特性分析。结果表明:雷击电流的A、B、C分量中C分量的破坏性最强,B分量破坏性最弱。A、B分量同时作用时,产生的最高温度高于单独A分量作用的结果。外股层半径每增加0.05 mm,仿真结果最高温度下降约20℃;外股导线半径每增加0.05 mm,仿真结果最高温度下降约25℃。仿真结果为优化光纤复合架空地线结构参数、提升耐雷性能提供了理论支撑。

In order to study the influence of the change of optical cable structure on the lightning strand breaking of optical fiber composite overhead ground wire(OPGW),the COMSOL Multiphysics software is used to simulate the local lightning strike point.By applying different lightning current A,B,C components and changing the structure of overhead ground wire,the lightning strand breaking characteristics of optical fiber composite overhead ground wire are analyzed.The results show that among the A,B and C components of lightning current,the C component is the most destructive,and the B component is the weakest.When A and B components act simultaneously,the maximum temperature is higher than that of A component alone.For every 0.05 mm increase in the outer layer radius,the maximum temperature of the simulation results decreases by about 20℃.For every 0.05 mm increase in the radius of the outer wire,the maximum temperature of the simulation results decreases by about 25℃.The simulation results provide theoretical support for optimizing the structural parameters of optical fiber composite overhead ground wire and improving the lightning protection performance.