A technique is developed for predicting the lightning stroke distribution over a territory that is occupied by extended objects protected by lightning arresters (for example, high-voltage substations). It is shown that the techniques used to predict the number of lightning strokes to small objects located in a rated zone protected by lightning arresters are inapplicable to extended objects. The probability distribution is calculated for the number of lightning strokes to lightning arresters and to arrester-protected extended objects at different arrangements of the arresters.
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