Finite Element Modelling of Aeolian Vibrations on Stranded High-voltage OHL Conductors

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...

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Vydáno v:IET Conference Proceedings s. 60
Hlavní autoři: AlAqil, M.A, Kopsidas, K
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: Stevenage, UK IET 2018
The Institution of Engineering & Technology
Témata:
Aerodynamic forces
Aerodynamics
Computational fluid dynamics
Conductors
Cylinders
Drag
Finite element method
Fluid flow
Fluid mechanics and aerodynamics (mechanical engineering)
General fluid dynamics theory, simulation and other computational methods
High Reynolds number
Mathematical models
Mechanical components
Numerical analysis
Numerical approximation and analysis
Numerical models
Overhead power lines
Shear forces
Trapezoids
conductors (electric)
main input data
aerodynamics
trapezoidal stranding shapes
aerodynamic forces
shear forces
relevant standard experimentations
EBM
indoor test-spans
drag
stranded high-voltage OHL conductors
vibrations
conductor properties
conductor geometry
single OHL conductors
Aeolian vibrations
finite element analysis
wind-conductor interaction numerical modelling
different outer layer stranding shapes
commonly implemented method
numerical model
Finite Element Modelling techniques
overhead line conductors
power overhead lines
Energy Balance Method
Navier-Stokes equations
ISBN:9781839531330, 1839531339
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Shrnutí: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 wind-conductor 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 NavierStokes 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.
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ISBN:9781839531330
1839531339
DOI:10.1049/cp.2018.1892