Dynamic Analysis of Core Temperature of Low-Voltage Power Cable Based on Thermal Conductivity

The core temperature measurement of 0.6/1-kV low-voltage ethylene propylene rubber-insulated single-core power cable based on thermal conductivity is proposed in this paper. First, the cable temperature is measured by considering a variety of environmental temperatures and load currents. Second, in order to improve the computational accuracy, a 3-D finite-element model is established and simulated using the ANSYS software. Finally, according to the difference between the experimental and simulation results, the thermal conductivity of the insulation layer and sheath layer is altered. After modification of the thermal conductivity, the temperature of the simulation can follow the metrical data better. Simulation results verify that the proposed method is able to estimate the core temperature with high sensitivity.