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The lightning protection transformation is strongly needed because the transmission lines in mountainous areas have been frequently subject to the lightning damage. This chapter carries out research studies on the lightning protection of transmission lines in mountainous areas by the technology of differentiated lightning protection; at the same time, the lightning risk assessment using differentiated lightning protection is conducted as to 110 kV transmission line with the most frequent flashovers. The factors of terrains and topographic features of towers, lightning activities, and insulation configuration have been considered in the course of risk assessment. The scheme of lightning protection transformation is thus proposed based on the assessment results technically and economically.
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- Application of Differentiated Lightning Protection to Typical Transmission Lines in Mountainous Areas