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Analysis of lightning protection performance of 110 kV transmission line canceling lightning wire

The 110 kV transmission line is an essential part of high-voltage transmission lines. However, some 110 kV lines have severe icing problems and plan to use the mode of operation without the lightning wire. In this paper, the ATP software simulates the transmission line with the lightning wire canceled. Then the lightning withstanding level of the line after the lightning wire is canceled is studied. The simulation obtains the lightning withstanding level under different grounding resistance of the tower. The results show that the lightning withstanding level of the transmission line after the lightning wire is canceled lower than that of the standard transmission line. Based on the simulation results, this paper proposes using the anti-lightning and antiicing composite insulator to improve the lightning protection performance of transmission line without the lightning wire. Through simulation calculations, it finds that the lightning withstanding level of the transmission line has been dramatically improved after applying the anti-lightning and anti-icing composite insulator. It indicates that installing the anti-lightning and anti-icing composite insulator is a feasible solution on the transmission line without lightning wire.