基于热电类比理论的光纤复合低压电缆温度分布特性研究

光纤复合低压电缆(OPLC)作为坚强智能电网的重要产品,将光单元与电缆复合在一起,能够实现信息及电力的双重传输.OPLC温度特性研究对决定光网络传输稳定性和可靠性具有重要意义.本文基于热电类比理论提出了OPLC热路模型的建模方法,以双缆芯OPLC为例建立暂态热路模型,并对光单元位置单独建模,实现各位置温度的精确计算.在此基础上,利用遗传算法对模型热阻、热容参数辨识,提高了温度特性研究的准确性;通过COMSOL仿真分析及搭建温度测量实验平台分别获得不同电流大小时OPLC各位置温度值,通过对比热路模型计算得到各位置温度值与仿真及实验所得温度值误差小于1.3℃,验证了基于热电类比理论研究OPLC温度特性的有效性.

Research on temperature distribution characteristics of optical fiber composite low voltage cable based on thermoelectric analogy theory

As an important product of the strong smart grid, optical fiber composite low-voltage cable (OPLC) combines optical units and cables to achieve dual transmission of information and power. OPLC temperature characteristics studies are very important to determine the stability and reliability of optical network transmission. Based on the thermoelectric analogy theory, a modeling method of OPLC heat circuit model is proposed in this paper. The transient thermal path model is established by taking the double cable OPLC as an example, and the position of the light unit is separately modeled to realize the accurate calculation of the temperature of each position. On this basis, the genetic algorithm (GA) is used to identify the thermal resistance and heat capacity parameters of the model, which improves the accuracy of temperature characteristics research. Through the COMSOL simulation analysis and the temperature measurement experimental platform to establish different current magnitudes, the OPLC temperature values are obtained. Comparing the heat path model, the error between the temperature value of each position and the temperature value of the simulation and experiment is less than 1.3℃，which verifies the validity of OPLC temperature characteristics based on thermoelectric analogy.