G. Buonanno et al., EFFECT OF RADIATIVE AND CONVECTIVE HEAT-TRANSFER ON THERMAL TRANSIENTS IN POWER-CABLES, IEE proceedings. Generation, transmission and distribution, 142(4), 1995, pp. 436-444
A model to study the thermal behaviour of a system of directly buried
electrical power cables is presented. The model completely describes t
he conditions of heat transfer at the soil-air interface. In particula
r, the different incidences that the various radiative components have
on the evolution of temperature in the system examined are evaluated.
The method is applied to the case of a three-phase line placed under
a daily cyclic load, based on experimental observations made on a line
with cable of similar characteristics. Different evaluations are carr
ied out assuming different characteristics for the soil and the climat
ic conditions.