Real-time On-line Anti-icing and Ice-melting Power Calculation Method for Transmission Lines Based on Self-ice-melting Conductors

The aluminium which strands of self-ice-melting conductor is used to transmit electric energy. If there is a potential difference between the aluminium strands and the steel cores, the heating material that has been embedded between the aluminium strands and the steel cores will generate heating that make the self-ice-melting conductor have real-time on-line anti-icing and ice-melting capability. Accurate control of anti-icing and ice-melting power to make the conductor temperature in a reasonable state is the key technology of self-ice-melting conductor. For the power required for anti-icing, the anti-icing process can be divided into warming-up stage and warm-holding stage, and the power requirement of warming-up stage includes the energy absorbed by the conductor during warming-up process, the energy needed for melting the newly added icing during warming-up process and the energy needed for convective heat transfer on the conductor surface, for the warm-holding stage, the power required for anti-icing includes the energy needed for instant melting of newly added and the energy required for convective heat transfer on the conductor surface. The energy needed in the ice-melting process includes the energy needed in the warming-up stage and the energy needed in the ice-melting stage, and the energy required in the warming-up stage includes the energy required for conducting wires and water to rise above zero degrees Celsius and for convective heat dissipation, the energy required in the ice-melting stage includes the energy needed to melt the ice stock, the energy needed to melt the newly added ice and the energy lost by convective heat transfer outside the conductor. By the calculation method, the thermal energy requirement of self-ice-melting ice conductor can be effectively calculated.