Electronic Journal Technical Acoustics ISSN 1819-2408

Houari Sayah, Mostefa Rahli, Ahmed Massoum

Aeolian vibrations of the overhead cables

language: English

received 18.05.2004, published 01.10.2004

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ABSTRACT

Wind induced vibrations (Aeolian vibrations) of overhead transmission lines and resulting conductors fatigue breakages constitute a problem for utility companies in maintaining uninterrupted supply of electrical energy. The aim is the study of Aeolian vibrations of overhead transmission lines conductors. The fractures caused by the wind vibrations often appear in front of the points of attachment, and with the junctions of the conductors. To this end one tried to give a mathematical model of the forces acting on the cables, as well as a mathematical model of the cable. This model permits to have curves of the amplitude according to the speed of the wind and the frequency. A simplified analysis of the partial differential equation describing these vibrations is presented using the concept of characteristic length as a single quantity describing the mechanical properties of a conductor.

8 pages, 7 figures

Сitation: Houari Sayah, Mostefa Rahli, Ahmed Massoum. Aeolian vibrations of the overhead cables. Electronic Journal “Technical Acoustics”, http://www.ejta.org, 2004, 13.

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		Houari Sayah was born in 1954 in Angad, Tlemcen, Algeria. He received his BS degree in electrical engineering from the Electrical Engineering Institute of The University of Sciences and Technology of Oran (USTO) in 1980, and the MS degree from the Electrical Engineering Institute of The University of Sidi Bel-Abbes in 1994. He is currently Professor of electrical engineering, in University of Sidi Bel-Abbes Algeria. He is a member of ICEPS (Intelligent Control Electrical Power System) Laboratory. e-mail: housayah(at)yahoo.fr
		Mostefa Rahli was born in 1949 in Mocta-Douz, Mascara, Algeria. He received his BS degree in electrical engineering from the Electrical Engineering Institute of The University of Sciences and Technology of Oran (USTO) in 1979, the MS degree from the Electrical Engineering Institute of The University of Sciences and Technology of Oran (USTO) in 1985, and the PhD degree from the Electrical Engineering Institute of The University of Sciences and Technology of Oran (USTO) in 1996. From 1987 to 1991, he was a visiting professor at the University of Liege (Monte ore’s Electrical Institute) Liege (Belgium) where he worked on Power Systems Analysis under Professors Pirotte and Jean Louis Lilien. He is currently Professor of electrical engineering at The University of Sciences and Technology of Oran (USTO), Oran, Algeria. His research interests include operations, planning and economics of electric energy systems, as well as optimization theory and its applications. e-mail: rahlim(at)yahoo.fr
		Ahmed Massoum was born in 1959 in M’sirda Fouaga, Tlemcen, Algeria. He received his BS degree in electrical engineering from the Electrical Engineering Institute (INELEC) of Boumerdes 1985 and the MS degree from the Electrical Engineering Institute of Sidi Bel-Abbes University in 2004 where he is currently Professor of electrical engineering. He is a member in Intelligent Control Electrical Power System Laboratory (ICEPS). e-mail: ahmassoum(at)yahoo.fr