Analysis of transmission line de-icing using 18kV, 40kHz excitation

Transmission line de-icing with 18kV, 40kHz high frequency and high voltage excitation based on skin effect of conductor and dielectric loss is presented to overcome the existing technical defect. It is suitable for high voltage power network and need not outages. It increase the frequency of de-icing current to strength the skin effect of transmission lines, thus causing the line unit resistance increased and the melting current decreased with same heating power. The structure of de-icing device and its Wiring diagram are analyzed briefly. A de-icing simulation calculation model is established according to 1000 kV ac ehv transmission lines, and simulation is solved by ANSYS finite element analysis software, then temperature field distribution of ice-coated transmission line with 80 minutes' 18kV, 40kHz high frequency excitation shows that: the temperature of all ice-coated reaches 0 degrees. That is to say, all ice-coated is melted. The simulation results show that the method, transmission line de-icing with 18kV, 40kHz high frequency and high voltage excitation, has advantages of good feasibility, high efficiency and energy saving. © 2011 IEEE.