Progress Report on the Investigation of Galloping of Transmission Line Conductors [includes discussion]

The results are presented of progress to date in an experimental investigation of galloping conductors. In this work emphasis is placed on obtaining a better understanding of the mechanism of galloping, with the expectation that this approach may lead most quickly to a practical solution to the problem. The results are given of field observations, in which the translational and torsional motions of a number of naturally galloping conductors were determined, together with the observations on a full-sized experimental line fitted with airfoils. The instrumentation systems used are described. In addition, the torsional and damping characteristics for two sizes of ACSR (steel-reinforced aluminum) conductors are given.