Analysis of Non-Uniform Accreted Ice in Overhead Power Lines Using SAP2000

Abstract

The design principles of overhead power lines cover the effect of external loads in the atmosphere (ice load and wind load) on the layout of power transmission systems. These additional loads are closely related to the geographical and meteorological characteristics of the land, so each country projects the additional loads on the power line design by considering its conditions. The ice load, which should be especially considered in mechanical calculations of power lines, causes forces on the conductor in the vertical direction. However, these vertical forces affect only one part of the conductor in the presence of partial ice, which generally occurs due to falling some ice in the power line to the ground for any reason or directly because of meteorological events and geographical features. The analysis of partial ice load is defined as the non-uniform accreted ice problem in the related studies. This study investigates the effect of non-uniform accreted ice on the conductor curve using data from Turkey. The results obtained from the non-linear model created using SAP2000 (Structural Analysis Program) are verified with the equations in the literature. The proposed model can be used to solve other problems by changing the parameters for cases in different countries.