Analysis for Chemical Thermal Reaction of Optical Fibre Composite Low-Cable Based on Finite Element Analysis

Abstract

In order to monitor the current magnitude and temperature field distribution of optical fibre composite low-cable (OPLC) under working condition, this paper uses COMSOL Multiphysics software to simulate the internal thermochemical reaction of OPLC under different conditions and temperatures, and obtain the influence law of different factors on its temperature field distribution. Then, it further studies the variation of current and temperature in the erected and buried composite cable. The research shows that the temperature of the inner conductor in OPLC gradually increases with the increase of the external environment temperature; the wind speed between 0.1m/s and 3m/s is beneficial to reduce the temperature inside the composite cable conductor; the maximum internal temperature of direct buried composite cable is positively correlated with soil temperature, and the maximum temperature value inside the composite cable also gradually increases with the increase of soil volume fraction and buried depth; the variation of current in the overhead composite cable is linearly positively correlated with the maximum temperature value of the temperature field, while the maximum eigenvalue of the internal temperature field in the direct buried composite cable is nonlinearly positively correlated with the current magnitude.