International Scientific Journal

Thermal Science - Online First

online first only

Thermodynamic model of critical ice-melting current on iced transmission lines

The thermal de-icing by Joule effect is a mostly valid way to prevent transmission lines from the severe ice storm. A model was put forward to simulate the critical ice-melting current on iced conductor. Based on this model, the value of critical ice-melting current was calculated with various parameters, some of which were ignored in the earlier literatures, such as ice-layer heat conductivity, wind attack angle, and icing section shape. The results of the experiment and simulation show that the critical ice-melting current increase with wind speed, wind attack angle, and ice-layer heat conductivity, but decrease rapidly with ambient temperature and LWC. Moreover, the maximum difference between the results of simulation and experiment is about 9%, thus this model can be employed to estimate the engineering parameters in practical thermal de-icing projects.
PAPER REVISED: 2018-04-11
PAPER ACCEPTED: 2018-04-14
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