Simulation Research on Cross-Sectional Stability of Expanded Diameter Conductors Based on ANSYS

Abstract:

The expanded diameter conductors are widely used for high voltage electricity power transmission due to its superior ability to prevent electronic corona phenomenon. However an undesired stability problem of wire distribution configuration within the cross-section of the conductor often occurs during the power line stringing processes, especially for the not-well-designed conductor structures. This phenomenon is typically characterized by the appearance of outer wire/wires jumping out of the layer; therefore it is also referred as wire jump-out problem. Finite element model which can predict the wire jump-out phenomenon has been successfully developed in this research project. Series of stimulations have been carried out to investigate the key factors to cause the wire jump-out problem. The reduction of radial distances between the adjacent aluminum wire layers due to the obvious indentation deformation at the trellis contact points were identified to be one of the most significant factors to lead to the wire jump-out problem. Numerical results show that keeping sufficient initial gap between the adjacent outer layer wires in the initial design can be a simple effective way to relieve/avoid the wire jump-out problem.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 2838-2843
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.2838
• Online since: December 2012
• Authors: Jia Jun Si, Jian Cheng Wan, Bin Liu, Yao Ding
• Keywords: Critical Load, Cross-Sectional Stability, Expanded Diameter Conductor, Finite Element (FE) Simulation, Wire Jump-Out Phenomenon

References

[1] Wan JC, Liu Z, Sun BD: Classification of expanded diameter conductors and choice of diameter expansion method, Electric Power Construction, Vol. 31(6), 2010, pp.24-29.

[2] Liu BC, Yu XC, Guo RC: Application prospect of extended diameter conductor in UHV AC large capacity transmission projects, Power System Technology, Vol. 31(21), 2007, pp.34-38.

[3] Saeed Moaveni, in: Finite Element Analysis Theory and Application with ANSYS, edited by Publishing House of Electronics Industry, Beijing (2005), in press.

[4] Jiang WG, Henshall JL: The analysis of termination effects in wire strand using the finite element method, Journal of Strain Analysis for Engineering Design, Vol. 34(1), 1999, pp.31-38.

DOI: 10.1243/0309324991513605

[5] Jiang WG, Warby M, Henshall JL: Statically indeterminate contacts in axially loaded wire strand, European Journal of Mechanics A/Solids, Vol. 27(1), 2008, pp.69-78.

DOI: 10.1016/j.euromechsol.2007.02.003

[6] Jiang WG: A concise finite element model for pure bending analysis of simple wire strand, International Journal of Mechanical Science, Vol. 54(1), 2012, pp.69-73.

DOI: 10.1016/j.ijmecsci.2011.09.008

[7] Jiang WG, Henshall JL, Walton JM: A concise finite element model for 3-layer straight wire rope strand, International Journal of Mechanical Sciences, Vol. 42(1), 2000, pp.63-86.

DOI: 10.1016/s0020-7403(98)00111-8