基于COMSOL Multiphysics的多重雷电流分量对OPGW断股分析

Analysis of OPGW Strand Breakage by Continuous Lightning Current Component Based on COMSOL Multiphysics

光纤复合架空地线(OPGW)的断股严重影响着电力系统的安全稳定性,为了研究雷电流对OPGW断股的影响,应用COMSOL Multiphysics对雷击点局部温度进行仿真,对连续雷电流B、C分量的作用下与多重雷电流A、B、C分量的作用下进行OPGW断股特性分析。结果表明:转移电荷量的大小是决定断股的主要原因。多重雷电流A、B、C分量作用产生温度与断股损伤程度均高于连续雷电流B、C分量的作用。先导雷电流分量越多,作用在OPGW表面遗留的载流子越多,转化的温度越高,形成的等离子通道与后续雷电流C分量形成的等离子通道更容易快速结合。先导雷电流产生的温度可弥补转移电荷量的所生成能量的温度,即雷电流A、B分量具有研究意义。仿真结果为今后OPGW的抗雷击性能与机械性能研究提供参考。

The strand break of the optical fiber composite overhead ground wire(OPGW)seriously affects the safety and stability of the power system.In order to study the influence of lightning current on the OPGW strand break,the local temperature of the lightning strike point is simulated by COMSOL Multiphysics,and the continuous lightning current B,C Under the action of the component and the multiple lightning currents A,B,C components,the OPGW stranding characteristics are analyzed.The results show that the amount of transferred charge is the main reason for determining the strand break.The effects of multiple lightning currents A,B,and C components on temperature and broken strand damage are higher than those of continuous lightning currents B and C.The more the lightning current component is,the more carriers are left on the surface of the OPGW,and the higher the temperature of the conversion,the faster the plasma channel formed by the formed plasma channel and the subsequent lightning current C component can be quickly combined.The temperature generated by the pilot lightning current can compensate for the temperature of the generated energy of the transferred charge,that is,the lightning current A and B components have research significance.The simulation results provide reference for the future research of lightning resistance and mechanical properties of OPGW.