Simulation of melting ice on overhead power line wires by the point sources method

The computer model of ice melting at heating the phase conductors and of ground wire by passing through them high enough power electric current, is described in this paper. The model is based on the point sources method (PSM). Firstly, it is necessary to define the threshold heating power, which will provide beginning of the melting process. If the heating power is slightly higher than the threshold power, the temperature fields in the volume of ice in the coupling and in the volume of water, filled groove are close to the values established and described by the Laplace equation. Numerical solutions of boundary value problems for the Laplace equation corresponding to the various provisions of the phase water-ice boundary on the temporal levels following one after another is performed by PSM. Calculations are made till the moment of reset ice couplings. The dependences of reset time of the ice coupling off its thickness and heat capacity of the wire, the average temperature, wire heating power and time and other dependencies are obtained. The obtained results are both in qualitative and in quantitative agreement with the results obtained by using other models of ice melting, and with the results of the practical implementation of this process.