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Corrosion detection in ACSR cables

Jaffrey, Nisar (2013) Corrosion detection in ACSR cables. Other thesis, Murdoch University.

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Overhead transmission lines are the most economical and commonly used carriers of electricity. Aluminium Conductor Steel Reinforced (ACSR) cables, as part of transmission lines, are used in severe environments in coastal areas and industrial zones for many years. These cables are affected by galvanic corrosion in the interface between the aluminium and steel strands. On the other hand, it is important for power companies to use efficient technology to locate and repair any significant faults on transmission lines at the earliest possible stage that could help them reduce maintenance costs and increase the quality of the power supply. This report investigates the existing methods of corrosion detection used in ACSR cables of overhead transmission lines, and estimates the location of corrosion through simulation in a computer program. In particular, the report analyses two promising methods of corrosion detection, namely “electromagnetic induction” and “time domain reflectometry”, and explains in detail their principle of operation and efficiency. In addition, the report also mentions some of the corrosion detectors available on the market and discusses their characteristics. In the latter part of the report, one of the existing techniques is thoroughly investigated by implementing in a computer program, and the simulation results are discussed. It also describes a few obstacles that might be faced if the technology is applied practically, and offers suggestions for a better approach to the problem.

Publication Type: Thesis (Other)
Murdoch Affiliation: School of Engineering and Information Technology
Supervisor: Hettiwatte, Sujeewa
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