基于热路模型的电力电缆温升计算方法综述

Review of Researches on Thermal Circuit Model for Conductor Temperature Calculation of Power Cables

电缆导体温度是限制电缆载流量的主要原因,也是决定电缆绝缘寿命的关键因素,导体温度的准确计算对电缆线路的安全运行具有重要意义。基于传热学理论基础,分析了电力电缆温升过程中的热源、不同敷设方式下电缆传热(散热)方式,基于电缆的传热学问题,讨论了基于热路模型的电缆稳态和暂态温升计算方法和主要研究方向。

The temperature of cable conductor is the main factor limiting cable ampacity, and determining the life of cable insulation. The accurate calculation of the conductor temperature is of great significance to the safe operation of cable lines. Based on the theory of heat transfer, this paper analyzes the heat source of power cable that causes temperature rise, and the heat transfer(heat dissipation) mode of the cable under different laying methods. Based on the analysis of cable heat transfer problem, main researches on steady state model and transient model of power cable temperature rise is summarized and prospected.