Research on excitation deicing for transmission line with considering the deicing power attenuation

Transmission line icing is a common natural disaster in southern China with great harm to the security operation of power systems. Deicing method with high-frequency excitation has the advantages of small ice-melting current and high ice-melting efficiency, but over high operating frequency and voltage would produce electromagnetic interference to the surrounding radio communication, cause corona loss to reduce the effect of melting ice, and may increase the cost of manufacture high-frequency excitation equipment. In this paper, uniform transmission line theory is used to determine the optimum operating frequency and voltage of the excitation source with considering the deicing power attenuation. The excitation deicing method with parameters 3kHz/11kV and deicing effect are identified, using MATLAB and ANSYS simulation to verify its feasibility and comparing the deicing effect with DC shorted deicing. The research result shows the superiority of deicing that it reduces ice-melting current and power capacity, and reduces the ice-melting time to improve deicing efficiency. The electromagnetic interference, corona loss, and the manufacturing cost of the excitation source are also reduced.