Publication: Effects of a crossarm brace application on a 275 KV fiberglass-reinforced polymer crossarm subjected to a lightning impulse muhammad syahmi
Date
2020
Authors
Rahman A.
Kadir M.Z.A.A.
Ab-Rahman M.S.
Osman M.
Nor S.F.M.
Zainuddin N.M.
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI AG
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 19900s. 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. � 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Description
Electric lines; Electric power transmission; Glass fibers; Lightning; Reinforced plastics; Transmissions; Different voltages; Fiberglass-reinforced polymers; Lightning impulse; Lightning impulse voltage; Mechanical performance; Potential distributions; Simulation studies; Transmission tower; Reinforcement