Method of calculating the vulnerability of an overhead transmission line to faults caused by galloping

An attempt is made to identify the spans or sections of an overhead line route that are most vulnerable to galloping. Methods are presented for calculating from meteorological records the probability of the occurrence of galloping of clashing amplitude. The methods are perfectly general, given the necessary data. Using available data from meteorological stations, the methods are applied to two specific CEGB routes. The results give reasonable agreement on the relative vulnerability to clashing of different line designs, but poor agreement otherwise. Although a large number of remote automatic meteorological stations would be required to improve predictions, it is suggested that a better way to identify troublespots in the same timescale is to install distance-to-fault locators. The paper concludes that substantial numbers of `anti-galloping¿¿ devices would be required if galloping to clashing amplitudes is a random event not restricted to specific `rogue¿¿ spans