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电网技术  2015 

基于矩阵广义逆的电缆线芯温度动态计算方法

DOI: 10.13335/j.1000-3673.pst.2015.01.015, PP. 97-102

Keywords: power,cable,core,temperature,indirect,measurement,dynamic,calculation,generalized,inverse,operating,current,surface,temperature

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Abstract:

为更好地对电缆线芯温度进行间接测量,提出一种以电缆运行电流和表皮温度为输入的线芯温度动态计算方法。首先建立了电缆传热的简化热路模型,并在误差敏感性分析的基础上引入了线芯电阻随温度变化的二阶修正;然后对模型表征的微分方程进行离散化,得到仅有4个模型参数的计

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