Characteristics of Heat Resistant Aluminum Alloy Composite Core Conductor Used in overhead Power Transmission Lines

Abstract

The heat resistant aluminum alloy wire composite material core conductor (ACCC/HW) which was used in overhead transmission lines is developed and studied in this work. The composite material core is carbon fiber/glass cloth reinforced modified epoxy resin composite. Tensile stress tests and stress-strain tests of both composite core and conductor are taken at 25 °C and 160 °C. Sag test, creep test and current carrying capacity test of composite conductor are taken. The stress of composite conductor are 425.2 MPa and 366.9 MPa at 25 °C and 160 °C, respectively. The sag of conductor of 50 m length are 95 mm, 367 mm, and 371 mm at 25 °C, 110 °C, and 160 °C, respectively. The creep strain are 271 mm/km, 522 mm/km, and 867 mm/km after 10 years under the tension of 15% RTS (Rated Tensile Strength), 25% RTS and 35% RTS at 25 °C, and 628 mm/km under 25% RTS at 160 °C, according to the test result and calculation. The carrying capacity of composite conductor is basically equivalent to ACSR (Aluminum Conductor Steel Reinforced). ACCC/HW is suitable in overhead transmission lines, and it has been used in 50 kV power grid, according to the results.

Review of Thermal Stress and Condition Monitoring Technologies for Overhead Transmission Lines: Issues and Challenges

“…Moreover, HTLS conductors have the potential to carry more current than conventional conductors. The performance of the composite-core ACCC conductor was recently studied in [44]. The sag of the ACCC conductor was much lower than that of ACSR when they exceed their knee-point temperatures of 90 °C and 70 °C, respectively, because of the mechanical properties of ACCC, which has a lower core tensile strength than ACSR at approximately the same diameter.…”

Frequency Response Analysis of the Parallel-plate Transmission Line using Various Conductors

“…The study of K. Qiao, A. Zhu, B. Wang, C. Di, J. Yu, B. Zhu [25] provides a comparison of alloy wire composite material core conductor (ACCC/HW) to the standard aluminum conductor steel reinforced (ACSR) overhead transmission lines. The lines were subjected to different tests such as high current capabilities, heat relation to sagging, and tensile strength tests.…”

Thermal Expansion Behavior of Co-Spray Formed Al-20Si/7075 Bimetallic Gradient Alloy

“…In the last two decades, aluminum matrix composites have been widely applied in the field of scientific research and manufacturing on account of their excellent performance characteristics including low density and high strength, good elevated-temperature performance, and good friction performance [ 1 , 2 ]. Functionally graded materials (FGMs) have strong application prospects [ 3 , 4 ], as they have the capability to customize materials for specific applications, whose properties change with spatial coordinates [ 5 , 6 ].…”

“…The 7075 alloy is extremely common and applicable in many fields because of its excellent mechanical performance such as high-specific strength, good plastic deformation, and good low temperature strength [ 10 , 11 , 12 ]. Similarly, Al-20Si alloy is widely applied in the aerospace and automobile industries, among others, because of its excellent wear resistance and thermophysical properties [ 2 , 13 , 14 ]. Therefore, functionally graded materials made from these two aluminum alloys may benefit from high strength, good friction performance, and outstanding thermophysical properties, so they were utilized in versatile cases, in particular electronic packaging.…”