OPLC温度分布及光单元传输损耗特性研究分析
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摘要
针对温度变化对光纤复合低压电缆(OPLC)传输性能的影响,综合考虑电缆温度场分布以及材料膨胀系数不同导致的应力差分布特性,建立了OPLC温度变化与传输损耗的数学模型。在此基础上,设计了基于电力场、光场、温度场和应力场等多物理场耦合的仿真模型,采用有限元分析方法,结合COMSOL Multiphysics仿真软件,分别模拟了OPLC在稳定运行状态和短路故障状态下的温度分布及光单元传输损耗特性。仿真结果表明,OPLC在稳定运行状态和短路故障状态下的温度分布及传输损耗与理论计算基本相符,由短路故障引起的光纤传输损耗呈平稳衰减趋势,在工程上可以忽略不计。
In this paper,the mathematical model for Optical Fiber Composite Low-Voltage Cable(OPLC)temperature distribution and transmission loss is established considering the effect of temperature change on the transmission performance of OPLC.The model also considers the distribution characteristics of the temperature field of the cable and the difference in the stress expansion caused by different coefficients of expansion of the material.Based on the proposed model,a simulation model of physical field coupling including electric field,light field,temperature field and stress field is designed.Using finite element numerical analysis method and COMSOL Multiphysics simulation software,we analyze the temperature characteristics and light unit transmission loss characteristics of OPLC under steady state and short circuit fault conditions.The simulation results show that the temperature distribution and transmission loss of OPLC are basically consistent with the theoretical calculations in the stable operation state and short-circuit fault state.The optical fiber transmission loss caused by the short-circuit fault shows a steady attenuation trend,which can be neglected in the engineering.
In this paper,the mathematical model for Optical Fiber Composite Low-Voltage Cable(OPLC)temperature distribution and transmission loss is established considering the effect of temperature change on the transmission performance of OPLC.The model also considers the distribution characteristics of the temperature field of the cable and the difference in the stress expansion caused by different coefficients of expansion of the material.Based on the proposed model,a simulation model of physical field coupling including electric field,light field,temperature field and stress field is designed.Using finite element numerical analysis method and COMSOL Multiphysics simulation software,we analyze the temperature characteristics and light unit transmission loss characteristics of OPLC under steady state and short circuit fault conditions.The simulation results show that the temperature distribution and transmission loss of OPLC are basically consistent with the theoretical calculations in the stable operation state and short-circuit fault state.The optical fiber transmission loss caused by the short-circuit fault shows a steady attenuation trend,which can be neglected in the engineering.
引文
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[17]IEC-949-1990,Calculation of Thermally Permissible Short-Circuit Currents,Taking into Account Non-Adiabatic Heating Effects[S].
[18]IEC-986-1993,Guide to the Short-Circuit Temperature Limits of Electric Cables[S].
[19]GB/T9771.1-2008,Single-mode Optical Fibers for Telecommunication-Part 1:Characteristics of a Dispersion Unshifted Single-mode Optical Fiber[S].
[2]张新伦,袁维贵,卜宪德,等.OPLC电缆构建智能用电小区通信网络的研究[J].电气技术,2011,(12):42-45.
[3]刘洪进,杨红蕾,韦祖国,等.光纤复合低压电缆(OPLC)的试制与应用浅析[J].现代传输,2011,(2):52-54.
[4]范宏,高亮,周利俊,等.智能电网的电力光纤入户技术及其应用[J].电力自动化设备,2013,33(7):149-150.
[5]沈佩芳,袁奇力,黄韵.浅谈OPLC[J].光纤与电缆及其应用技术,2011,(6):19-20.
[6]石培培,胡红利,王格,等.光纤复合低压电缆温度分布影响因素分析[J].西北大学学报(自然科学版),2018,48(1):24-30.
[7]李岩松,王兵,刘君.全光纤电流互感器温度特性建模分析与实验研究[J].中国电机工程学报,2018,38(9):1-11.
[8]涂兴华,倪彬,李军博,等.光纤复合低压电缆温度分布与光单元传输特性研究[J].量子电子学报,2017,34(1):88-93.
[9]丁丽娟,程杞元.数值计算方法[M].北京:北京理工大学出版社,2005.
[10]李淑君,王惠泉,赵文玉,等.基于COMSOL多物理场耦合仿真建模方法研究[J].机械工程与自动化,2014,(4):19-20,23.
[11]梁永春,李彦明,柴进爱,等.地下电缆群稳态温度场和载流量计算新方法[J].电工技术学报,2007,22(8):185-189.
[12]赵镇南.传热学[M].北京:高等教育出版社,2002.
[13]程嵩,郭志忠,张国庆,等.全光纤电流互感器的温度特性[J].高电压技术,2015,41(11):3843-3848.
[14]于海鹰,李琪,索琳,等.分布式光纤测温技术综述[J].光学仪器,2013,35(5):90-94.
[15]Jianming L,Jiye W,Pengzhan F.Application of PFTTH in Smart Grid[J].IEEE,2011,(2):13-16.
[16]IEC 60287-1(2,3)-1-2007,Electric Cables-Calculation of the Current Rating-Part 1(2,3)-1[S].
[17]IEC-949-1990,Calculation of Thermally Permissible Short-Circuit Currents,Taking into Account Non-Adiabatic Heating Effects[S].
[18]IEC-986-1993,Guide to the Short-Circuit Temperature Limits of Electric Cables[S].
[19]GB/T9771.1-2008,Single-mode Optical Fibers for Telecommunication-Part 1:Characteristics of a Dispersion Unshifted Single-mode Optical Fiber[S].