Abstract
This work reports the fretting wear behavior of aluminum cable steel reinforced (ACSR) conductors for use in high-voltage transmission line. Fretting wear tests of Al wires were conducted on a servo-controlled fatigue testing machine with self-made assistant apparatus, and their fretting process characteristics, friction force, wear damage, and wear surface morphology were detailed analyzed. The results show that the running regime of Al wires changes from a gross slip regime to a mixed regime more quickly as increasing contact load. With increasing amplitudes, gross slip regimes are more dominant under contact loads of lower than 30 N. The maximum friction force is relatively smaller in the NaCl solution than in a dry friction environment. The primary wear mechanisms in dry friction environments are abrasive wear and adhesive wear whereas abrasive wear and fatigue damage are dominant in NaCl solution.
Highlights
Aluminum cable steel reinforced (ACSR) conductors are extensively used in electric transmission systems in different countries and regions, especially in China
Studies on the damage of 26-year-old aluminum cable steel reinforced (ACSR) conductors in the 100 kV Zhu-Xie electric transmission system in China revealed that adhesion/abrasive fretting damage mechanisms and fatigue cracks propagation were dominated in the inner Al wires [11]
30 N loads (Figure 4c), maximum friction force in the NaCl solution decreases from 58.4 N (102 cycles) to 31.7 N
Summary
Aluminum cable steel reinforced (ACSR) conductors are extensively used in electric transmission systems in different countries and regions, especially in China. Because of being operated in wild environments, ACSR conductors are usually subject to fretting damage by wind excitation and atmospheric corrosion by industrial pollution and salty environments. As a type of critical component of high-voltage transmission systems, most ACSR conductors have been operated for 30–45 years, approaching to their middle life, thereby requiring very high maintenance costs [1–6]. It is significant to explore fretting damage behaviors of ACSR conductors in dry and corrosive conditions. Many endeavors have been made on fretting damage behavior of ACSR conductors. Studies on the damage of 26-year-old ACSR conductors in the 100 kV Zhu-Xie electric transmission system in China revealed that adhesion/abrasive fretting damage mechanisms and fatigue cracks propagation were dominated in the inner Al wires [11]
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