Finite element modelling of aeolian vibrations on stranded high-voltage OHL conductors

Research output: Contribution to conferencePaper

Abstract

The problem of Aeolian vibrations has been studied in indoor test-spans for many years. Its relevant standard experimentations have resulted in introducing the Energy Balance Method (EBM) which is the most commonly implemented method in the industry. Besides conductor properties, aerodynamic forces (Lift and Drag forces) acting on the conductor are the main input data for the EBM. The existing models frequently use experimental data of Lift and Drag forces for a cylinder. To further investigate the capabilities of windconductor interaction numerical modelling, it is useful to take advantage of Finite Element Modelling techniques. This paper simulates the wind flow around single OHL conductors with different outer layer stranding shapes and sizes utilizing COMSOL Multiphysics software. The simulations are based on solving the Navier-Stokes equation to compute the aerodynamic forces by integration of the pressure and shear forces within the boundaries of the conductor geometry. The numerical model computes the aerodynamic forces for three conductor geometries including smooth-surface, round-stranded, and trapezoidal stranding shapes. The numerically obtained solutions show that less aerodynamic forces are experienced by rounds and trapezoids compared to the cylinder geometry. This observation is true for high Reynolds numbers.

Bibliographical metadata

Original languageEnglish
Pages1-6
Publication statusPublished - 14 Jul 2018
EventThe 11th Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion - Dubrovnik, Cvtat, Croatia
Event duration: 12 Nov 201815 Nov 2018
http://medpower2018.com

Conference

ConferenceThe 11th Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion
Abbreviated titleMEDPOWER2018
CountryCroatia
CityCvtat
Period12/11/1815/11/18
Internet address