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Aerodynamic instability of cables in transmission power lines; Inestabilidad aerodinamica en cables de lineas de transmision

Abstract

One of the aerodynamic instabilities of transmission power lines cables is galloping, which consists in the appearance of important cable vibrations, mainly when the wind hits orthogonally the power line. In some cases the maximum amplitude that occurs reaches several meters, even when the wind velocities in a region are well below the value used for the mechanical design of the power lines. In general terms, galloping is associated with particular climatic conditions such as low temperatures and high humidities. In these conditions a coating of ice that adheres to the cable is formed, changing its transverse cross section, propitiating the galloping, although some authors have reported galloping without ice. These climatic conditions are presented mainly in the Northern part of our country and in the high regions of the mountain zones; nevertheless, the galloping phenomenon has been reported in few cases by Comision Federal de Electricidad (CFE). The possible expansion of the power lines in these regions of the country leads to prevent the measures needed to diminish the appearance of this phenomenon. In this paper mention is made in particular of the solution adopted to the galloping problem that has appeared in the transmission power line of Salamayuca  More>>
Authors:
Lopez Lopez, Alberto; Vilar Rojas, Jorge Ivan; Munoz Black, Celso J [1] 
  1. Instituto de Investigaciones Electricas, Cuernavaca (Mexico)
Publication Date:
Dec 31, 1995
Product Type:
Miscellaneous
Report Number:
ETDE-MX-98006436
Reference Number:
SCA: 240300; PA: MX-98:000156; EDB-98:099415; SN: 98001995094
Resource Relation:
Journal Name: Boletin IIE; Journal Volume: 19; Journal Issue: 5; Other Information: DN: Sep-Oct 1995 issues; PBD: 1995; Related Information: Is Part Of IIE Bulletin: selected articles from 1995 issues of `boletin iie`; PB: [280] p.; Boletin IIE, v. 19
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; POWER TRANSMISSION LINES; MECHANICAL VIBRATIONS; AERODYNAMICS; MATHEMATICAL MODELS; NUMERICAL DATA
OSTI ID:
647112
Research Organizations:
Instituto de Investigaciones Electricas, Cuernavaca (Mexico)
Country of Origin:
Mexico
Language:
Spanish
Other Identifying Numbers:
Journal ID: BOIID8; ISSN 0185-0059; Other: ON: TI98006436; TRN: MX9800156
Availability:
Available from Unidad de Informacion Tecnologica, Instituto de Investigaciones Electricas, Av. Reforma 113, col. Palmira, 62490 Temixco, Mor., Mexico, Tel: (73) 18 38 11 ext. 7138, Fax: (73) 18 24 61; OSTI as TI98006436
Submitting Site:
MX
Size:
pp. 216-223
Announcement Date:
Oct 06, 1998

Citation Formats

Lopez Lopez, Alberto, Vilar Rojas, Jorge Ivan, and Munoz Black, Celso J. Aerodynamic instability of cables in transmission power lines; Inestabilidad aerodinamica en cables de lineas de transmision. Mexico: N. p., 1995. Web.
Lopez Lopez, Alberto, Vilar Rojas, Jorge Ivan, & Munoz Black, Celso J. Aerodynamic instability of cables in transmission power lines; Inestabilidad aerodinamica en cables de lineas de transmision. Mexico.
Lopez Lopez, Alberto, Vilar Rojas, Jorge Ivan, and Munoz Black, Celso J. 1995. "Aerodynamic instability of cables in transmission power lines; Inestabilidad aerodinamica en cables de lineas de transmision." Mexico.
@misc{etde_647112,
title = {Aerodynamic instability of cables in transmission power lines; Inestabilidad aerodinamica en cables de lineas de transmision}
author = {Lopez Lopez, Alberto, Vilar Rojas, Jorge Ivan, and Munoz Black, Celso J}
abstractNote = {One of the aerodynamic instabilities of transmission power lines cables is galloping, which consists in the appearance of important cable vibrations, mainly when the wind hits orthogonally the power line. In some cases the maximum amplitude that occurs reaches several meters, even when the wind velocities in a region are well below the value used for the mechanical design of the power lines. In general terms, galloping is associated with particular climatic conditions such as low temperatures and high humidities. In these conditions a coating of ice that adheres to the cable is formed, changing its transverse cross section, propitiating the galloping, although some authors have reported galloping without ice. These climatic conditions are presented mainly in the Northern part of our country and in the high regions of the mountain zones; nevertheless, the galloping phenomenon has been reported in few cases by Comision Federal de Electricidad (CFE). The possible expansion of the power lines in these regions of the country leads to prevent the measures needed to diminish the appearance of this phenomenon. In this paper mention is made in particular of the solution adopted to the galloping problem that has appeared in the transmission power line of Salamayuca to Reforma, Ciudad Juarez, Chihuahua (CFE,1991). [Espanol] Una de las inestabilidades aerodinamicas que se presentan en los cables de lineas de transmision es el galopeo, el cual consiste en la aparicion de vibraciones importantes de los cables, sobre todo cuando el flujo del viento incide ortogonalmente a la linea. En algunos casos las amplitudes maximas que se presentan llegan a ser de varios metros, aun cuando las velocidades del viento en una region esten muy por debajo del valor empleado para el diseno mecanico de las lineas. Generalmente, el galopeo se asocia con condiciones climaticas particulares como son las bajas temperaturas y altas humedades. En estas condiciones se forma una cubierta de hielo que se adhiere a los conductores, transformando su seccion transversal y favoreciendo al galopeo, aunque algunos autores han reportado galopeo sin hielo. Estas condiciones climaticas se presentan principalmente al norte de nuestro pais y en las partes altas de las zonas montanosas; no obstante, el fenomeno del galopeo se ha reportado en pocos casos por la Comision Federal de Electricidad (CFE). La posible expansion de lineas en estas regiones del pais conduce a prever las medidas necesarias para disminuir la aparicion del fenomeno. En particular, en este trabajo, se hara mencion a la solucion adoptada al problema de galopeo que se ha presentado en la linea de transmision de Samalayuca a Reforma, ciudad Juarez, Chihuahua [CFE, 1991].}
journal = {Boletin IIE}
issue = {5}
volume = {19}
place = {Mexico}
year = {1995}
month = {Dec}
}