OPLC光单元温度应力特性及传输特性的研究  

The study on thermal stress and transmission characteristics of optical fiber in OPLC

作　　者：胡红利[1] 王格 辛国良 陈玉[1] 徐晨[3] HU Hongli;WANG Ge;XIN Guoliang;CHEN Yu;XU Chen(State Key Laboratory of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China;State Grid Liaoning Electric Power Co., Ltd., Shenyang 110004, China;Shanghai Electric Cable Research Institute, Shanghai 200093, China)

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049 [2]国网辽宁省电力有限公司,辽宁沈阳110004 [3]上海电缆研究所,上海200093

出　　处：《西北大学学报（自然科学版）》2018年第6期810-816,共7页Journal of Northwest University（Natural Science Edition）

基　　金：国家重点研发计划资助项目(2016YFB0901200);陕西省工业科技攻关计划资助项目(2016GY-001)

摘　　要：针对光纤复合低压电缆(OPLC)在正常状态和短路故障状态时的工作特性,应用COMSOL多物理场仿真软件建立温度、应力和波动光学的耦合模型,分析光纤在这两种工作状态下温度场对应力场的影响,光纤在热应力作用下的形变,光纤在热形变基础上的传输特性,并研究OPLC短路对光纤传输特性的影响。结果表明:OPLC温度升高会使光纤几何结构发生变化,正常工作时的温升引起光纤的热变形远大于短路瞬态温升引起的热变形;正常工作时光纤存在一定的传输损耗,短路故障不会造成光纤传输损耗进一步增大,光纤在两种工作状态下的传输特性基本一致。According to the work characteristics of the optical fiber composite low-voltage cable(OPLC)in both steady-state and short-circuit fault state,the COMSOL software is applied to build a simulation model by coupling temperature,stress and the wave optics.Under these two working conditions,the influence of the temperature field on the stress field,the deformation of fiber under thermal stress and the fiber transmission properties under thermal deformation,the influence of the short circuit on fiber transmission characteristics are analyzed.The results show that the temperature rise of the OPLC will change the geometry of the fiber and the thermal rise of the fiber during normal operation is much higher than the thermal deformation caused by the short-circuit transient temperature rise.What′s more,the fiber has a certain transmission loss in steady-state and the short-circuit fault state does not worsen it.It also suggests that the fiber transmission characteristics in both states are almost the same.

关 键 词：光纤复合低压电缆 温度应力特性 光纤传输特性 多物理场耦合 COMSOL 

分 类 号：TN913.7[电子电信—通信与信息系统]