Application Of Finite Volume Method In Melting Ice Of Conductor Wire By Large Current

Ice storm give a huge damage to the power grid, so that the power system suffered a major loss. Melting ice on the transmission line of cladding ice is one of the most direct, effective, secure, economy and important means for the grid coping freeze disaster.In this paper, the ice-melting process of conductor wire is researched in which a large current through the conductor wire. We first study the energy balance equation involved in the process of ice-melting, assuming that during the process of melting ice, all the water flows away. We ignored the impact of natural convection in this process, and simplified the energy balance equation to a single phase change heat transfer process.The basic principle and numerical formula of finite volume method is studied, and the one dimensional model is built of ice melting on conductor wire. The influence of the current intensity and environmental temperature on the time of melting ice is studied in this process.Ignoring the impact of gravity, the two-dimensional model is built of ice melting on conductor wire. For the irregular two-dimensional region, using mesh generation technology and body fitted coordinate method to fit the irregular physical region into the regular plane. In this process the Laplace equation is used as the transformation equation, and the conversion of the boundary condition is done in the process.Finally, using the finite volume method to discretize the two-dimensional energy balance equation, and the discrete equations and boundary conditions are transformed by using differential equations. Then the equation is solved by using multiple iterations of the TDMA algorithm. The computer program is written out, and the impact of the currents and temperature to the time of melting ice, and the distribution of temperature on the ice surface during this process are studied.