In order to improve the lightning protection performance of 110 kV transmission line,a light-ning protection retrofit evaluation method based on combined weighting method and fuzzy comprehensive evaluation method is proposed.Firstly,according to the principle of differentiation under different light-ning protection measures,differentiated indicators are selected as the optimization objects of lightning protection measures;the weight value of lightning protection measures is assigned,and a lightning protec-tion evaluation model based on fuzzy comprehensive evaluation method is established.Finally,lightning protection verification is carried out for an example of a 110 kV transmission line in southeast China.The results show that:based on the lightning protection method proposed in this paper,the lightning protec-tion measures of the transmission line can be comprehensively evaluated,and the shielding and counterat-tack trip rates of the line towers are reduced by 72％and 53％respectively after optimization,indicating that the method proposed has achieved the expected results.
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