.一种运行电缆导体实时温度计算方法

运行电缆导体温度监测一直是电缆安全运行所关注的问题。运行电缆某时刻导体温度不能直接测量,往往是在已知电缆导体初始温度的前提下,通过计算间接获取。因此提出了用一定时段稳态温度直接作为导体实时温度计算初始值,并利用暂态和稳态热路模型对暂态和稳态导体温度进行了计算。通过试验证实了可行性,并在某工程中进行了验证,为运行电缆的安全运行和预警创造条件。

A Method for Real time Temperature Calculation of Conductors of Running Cables

Temperature monitoring of the conductors of running cables has remained a concern with respect to the safe operation of cables. The conductor temperature at a certain moment can not be measured directly. Instead, it is often obtained indirectly through calculation, when the initial temperature of the cable conductor is known. In this paper, the steady state temperature for a certain period of time is used directly as the initial value for the calculation of the real-time conductor temperature, and the transient and steady state temperatures are calculated by using the transient and steady state thermal circuit models. The feasibility of this method is proved through experiment and in an engineering project, thus creating conditions for safe operation and warning of running cables.