An Investigation of Temperature and Wind Impact on ACSR Transmission Line Sag and Tension

M Z Abbasi,M A Aman,F W Karam,B Noor,S Farooqi

doi:10.48084/etasr.2046

Abstract

Power transmission is mainly based on overhead transmission lines with conductors being supported by transmission towers. Transmission lines are subjected to environmental stress (temperature changes, winds, snow etc), have an impact on the surrounding areas (visual pollution, building restrictions) and experience heavy losses due to resistive, magnetic and capacitive effects. Thus, proper modeling and installation of these conductors are necessary. The conductors are generally installed in a catenary shape to minimize the capacitive effects and to balance the tension. This paper presents an investigation on the sag and tension behavior under different temperature and wind of ACSR (Aluminum Conductor-Steel Reinforced) lines. Four different cases of temperature and wind are tested to calculate sag and tension. Simulation setup is done in ETAP (electrical transient and analysis program). Results are recorded and discussed.

Highlights

Overhead transmission lines are used to carry electrical power over long distances [1]
MECHANICAL DESIGN OF A TRANSMISSION LINE The sag of a transmission line depends on the following factors: the conductor’s weight, the span
Four different cases of temperature and wind are considered on ACSR conductors with level supports

Summary

INTRODUCTION

Overhead transmission lines are used to carry electrical power over long distances [1]. The performance of these transmission lines depends on their well-engineered modeling which is one of the major issues issue during the design stage. The design stage results to certain routing, placement of towers, tower types, conductor sag and tension throughout the route [5]. Different types of conductors are used for the transmission of electrical energy e.g. AAC (All Aluminum Conductor), AAAC (All Aluminum Alloy Conductor), HTLS (High Temperature Low Sag), ACSS (Aluminum Conductor, Steel-Supported), ACSR Conductor-Steel Reinforced) with ACSR being probably the most usual choice for transmission lines. The high-quality ACSR 8/1, 12/7 and 16/19 standings are commonly utilized in special cases (e.g. intersections) [6].

MECHANICAL DESIGN OF A TRANSMISSION LINE

SYSTEM IMPLEMENTATION

RESULTS AND DISCUSSION

CONCLUSION