The Use of Underbuilt Wires to Improve the Lightning Performance of Transmission Lines

@article{Visacro2012TheUO,
  title={The Use of Underbuilt Wires to Improve the Lightning Performance of Transmission Lines},
  author={Silv{\'e}rio Visacro and F. H. Silveira and Alberto De Conti},
  journal={IEEE Transactions on Power Delivery},
  year={2012},
  volume={27},
  pages={205-213}
}
An unconventional technique to improve the lightning performance of transmission lines, consisting of the addition of grounded wires properly positioned below the phase conductors, is assessed. Overvoltages developed across insulator strings of existing 230-kV lines in response to direct strikes to the towers were simulated using an electromagnetic model. Minimum reductions of these voltages in the ranges of 19%-32% and 26%-44% were achieved for 20- to 80-Ω tower-footing grounding resistances… CONTINUE READING

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