Study on statistical evaluation method of arrangements of interphase spacers for galloping of single conductor transmission lines

Abstract

As one of the anti-galloping devices, interphase spacers have spread widely. However, effective arrangements of interphase spacers against galloping of snow accreted transmission lines are not examined enough until now. In this paper, in order to clarify the effective arrangements, the numerical simulations of galloping under acting artificial wind are repeated to many arrangements which can be considered, and the response statistics are evaluated. Using the statistical multiple comparison procedures, the optimal arrangement is determined considering the variation in the galloping response. Moreover, the difference in natural mode of transmission line by the arrangements is clarified, and the reason for the optimal arrangement is analyzed based on natural mode.