Effects of a Crossarm Brace Application on a 275 kV Fiberglass-Reinforced Polymer Crossarm Subjected to a Lightning Impulse

Muhammad Syahmi Abd Rahman, Mohd Zainal Abidin Ab Kadir, Muhamad Safwan Ab-Rahman, Miszaina Osman, Shamsul Fahmi Mohd Nor and Noorlina Mohd Zainuddin
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Muhammad Syahmi Abd Rahman: Institute of Power Engineering, Universiti Tenaga Nasional, Kajang 43000, Malaysia
Mohd Zainal Abidin Ab Kadir: Institute of Power Engineering, Universiti Tenaga Nasional, Kajang 43000, Malaysia
Muhamad Safwan Ab-Rahman: Institute of Power Engineering, Universiti Tenaga Nasional, Kajang 43000, Malaysia
Miszaina Osman: Institute of Power Engineering, Universiti Tenaga Nasional, Kajang 43000, Malaysia
Shamsul Fahmi Mohd Nor: Institute of Power Engineering, Universiti Tenaga Nasional, Kajang 43000, Malaysia
Noorlina Mohd Zainuddin: Institute of Power Engineering, Universiti Tenaga Nasional, Kajang 43000, Malaysia

Energies, 2020, vol. 13, issue 23, 1-16

Abstract: The crossarm is an important component of transmission towers, providing insulation for transmission lines at different voltage ratings. Recently, composite crossarms were widely used as a composite tower component and were found to be the most favorable choice for replacing old wooden crossarms. Owing to the satisfactory pilot operation and multiple sets of testing, fiberglass-reinforced polymer (FRP) composite crossarms have been used in Malaysia in both 132 and 275 kV transmission lines since the late 1990′s. Since then, some modifications have been proposed to improve the mechanical performance of the crossarm, in order to ensure the reliability of its performance. In this investigation, the effect of a proposed improvement, achieved by installing a brace for the crossarm, was investigated numerically. A simulation study was conducted, with a consideration of the lightning impulse voltage (LIV) and swing angle exhibited by the crossarm. The potential and electric field (E-Field) distribution were analyzed and are presented in this paper. It was found that the potential distribution and E-Field strength for the crossarm and the surrounding air were greatly affected by the installation of the brace.

Keywords: FRP crossarm; FEM; critical flashover voltages; electric field stress; composites (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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