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| Portada: 2009, Año internacional de la Astronomía |
ARTÍCULOS
Vol 3, Nro 1, Año 2009, pp 5-13.
Índice de importancia, probabilidad de falla y confiabilidad de los componentes de las líneas aéreas de distribución
IMPORTANCE INDEX, FAILURE PROBABILITY AND REABILITY OF THE COMPONENT OF DISTRIBUTION AERIAL LINE
Carmen Vásquez
Francir Briceño
William Osal
Carolina Blanco
Texto Completo/Full text
RESUMEN
ABSTRACT
A significant number of power interruptions in electric distribution systems are caused by component failures of airlines, namely that actions could be implemented to reduce them improve the quality of service provided. The aim of this study is to determine the importance indices, failure probability and reliability of the components of overhead power distribution lines of 13.8, 24 and 34.5 kV, of the ENELBAR and CADAFE, which serve the design future maintenance plans. The methodology consists of analyzing the statistics of failures occurred in the period from 2006 to 2008 to determine these variables, using the probabilistic software ReliaSoft Weibull + + 7 R. The results were analyzed a total of 969 failures and shows that the conductor and the connectors are the components with the importance indices and failure probability highest in all three studies. We conclude that maintenance plans can design this component so as to guide the reduction of resources for service failures.
Keywords: Failure probability, importance indices, reliability.
Vol 3, Nro 1, Año 2009, pp 15-22.
Inexact searches on the L-curve
Hugo J. Lara
Adalys Alvarez
Freddy Torrealba
Texto completo/Full text
Abstract
Texto Completo/Full text
RESUMEN
Un número importante de las interrupciones del servicio eléctrico en los sistemas eléctricos de distribución son causadas por fallas en los componentes de las líneas aéreas, es decir que las acciones que pudieran implementarse para disminuirlas mejorarían la calidad del servicio que se presta. El objetivo del presente trabajo es determinar el índice de importancia, la probabilidad de falla y la confiabilidad de los componentes de las líneas eléctricas aéreas de distribución de 13.8, 24 y 34,5 kV, de las empresas CADAFE y ENELBAR, que sirvan para el futuro diseño de planes de mantenimiento. La metodología consiste en analizar las estadísticas de fallas ocurridas en el período del 2006 al 2008 y determinar estas variables, utilizando el software probabilístico Reliasoft Weibull ++ 7 ®. Como resultados se destaca que se analizaron un total de 969 fallas y se demuestra que el conductor y los conectores son los componentes con el índice de importancia y la probabilidad de falla más alta, en los tres casos en estudios. Se concluye que se puede diseñar planes de mantenimiento a este componente de forma que se permita orientar los recursos para la disminución de fallas en el servicio.
Palabras clave: Confiabilidad, índice de importancia, probabilidad de falla.ABSTRACT
A significant number of power interruptions in electric distribution systems are caused by component failures of airlines, namely that actions could be implemented to reduce them improve the quality of service provided. The aim of this study is to determine the importance indices, failure probability and reliability of the components of overhead power distribution lines of 13.8, 24 and 34.5 kV, of the ENELBAR and CADAFE, which serve the design future maintenance plans. The methodology consists of analyzing the statistics of failures occurred in the period from 2006 to 2008 to determine these variables, using the probabilistic software ReliaSoft Weibull + + 7 R. The results were analyzed a total of 969 failures and shows that the conductor and the connectors are the components with the importance indices and failure probability highest in all three studies. We conclude that maintenance plans can design this component so as to guide the reduction of resources for service failures.
Keywords: Failure probability, importance indices, reliability.
Vol 3, Nro 1, Año 2009, pp 15-22.
Inexact searches on the L-curve
Hugo J. Lara
Adalys Alvarez
Freddy Torrealba
Texto completo/Full text
Abstract
In a Tikhonov regularization scheme to solve discrete linear ill-posed problems, selecting the parameter value is a key task. We use Wolfe inexact search on the L-curve to choose a λ regularization parameter value far from critical areas of the L-curve. Numerical results are shown comparing the inexact scheme with other exact searches.
RESUMEN
En un esquema de regularización para resolver problemas inversos lineales discretos, la selección del valor del parámetro es una tarea clave. Usamos la búsqueda inexacta de Wolfe sobre la curva L, para elegir un valor del parámetro de regularización _ lejos de ´áreas críticas de la curva L. Se muestran resultados numéricos que comparan el esquema inexacto con otras búsquedas inexactas.
Vol 3, Nro 2, Año 2009, pp 23-29.
TECHNOLOGY TRANSFERENCE PROGRAM IN THE AREA INDUSTRIAL AUTOMATION
Christian González
Carmen VásquezErvin Naranjo
William Osal
Texto completo/Full text
Resumen
La automatización es primordial para la producción de consumo masivo a nivel mundial. Las investigaciones en esta área introduce a los entes involucrados en un proceso de transferencia tecnológica, para desarrollar sistemas más complejos. En el 2008, entre la UPC y la UNEXPO se aprueba un Programa de Transferencia Tecnológica. La Educación a Distancia es hoy en día una gran necesidad de la sociedad moderna. Para ello se ha desarrollado una plataforma dedicado a la transferencia del conocimiento. Sin embargo, en el área de Ingeniería, es indispensable, no únicamente la transferencia del conocimiento, que es de manera presencial, sino también el desarrollo de las habilidades y destrezas que se obtienen al poner en práctica el conocimiento con esta plataforma. Se logran la formación de los investigadores que servirá de multiplicadores para impartir cursos y las actividades prácticas. En virtud de su importancia se ha contado con financiamiento de las diversas empresas para el desarrollo de plataformas de comunicación remotas con posibilidades de integración en red.
Palabras clave: Automatización Industrial, plataforma de comunicación remota, programa de transferencia tecnológica, enseñanza a distancia (EaD).
ABSTRACT
The Automation is essential for the production of consumer goods worldwide. Research in this area introduces the institutions involved in technology transfer process to develop more complex systems. In 2008, between UPC and UNEXPO adopting a Technology Transfer Program. Distance education is now a great need for modern society. For this we have developed a plataform dedicated to the transmission of knowledge. However, in the area of Engineering, is essential, not only the transfer of knowledge, which is in person, but also the development of skills that are obtained by putting knowledge into practice with this platform It manages the training of researchers that will serve as multipliers to provide courses and practical activities. By virtue of its importance, received funding to various companies for the development of remote communication platforms with networking opportunities.
Keywords: Industrial automation, plataform of remote communication, program of technological transference, distance learning (DL
Texto completo/Full text
Resumen
ABSTRACT
The problem of caculating eingenvalues has taken more importance, due to growing num- ber of applications involving matrices that represents several real system. In specific ap- plications as flow mechanics, the interest is gettings an extreme eingenvalues; so the op- timization approach emerge as a relevant option. In this work the utility of calculating generalized eingenvalues in the resulting matix from a discrete equation coming from a real applications, is described as an optimization problem. A polynomial type objective function proposed by Auchmuty is used.
Keywords: Generalized eingenvalues, optimization, difusion-connection
ABSTRACT
The Automation is essential for the production of consumer goods worldwide. Research in this area introduces the institutions involved in technology transfer process to develop more complex systems. In 2008, between UPC and UNEXPO adopting a Technology Transfer Program. Distance education is now a great need for modern society. For this we have developed a plataform dedicated to the transmission of knowledge. However, in the area of Engineering, is essential, not only the transfer of knowledge, which is in person, but also the development of skills that are obtained by putting knowledge into practice with this platform It manages the training of researchers that will serve as multipliers to provide courses and practical activities. By virtue of its importance, received funding to various companies for the development of remote communication platforms with networking opportunities.
Keywords: Industrial automation, plataform of remote communication, program of technological transference, distance learning (DL
Vol 3, Nro 2, Año 2009, pp 31-38.
Autovalores generalizados como problema de optimización: Una opción fácil para aplicaciones en problemas físicos reales
GENERALIZED EIGENVALUES AS AN OPTIMIZATION PROBLEM:AN EASY OPTION FOR REAL APPLICATIONS IN PHYSICS PROBLEMS
Joyne Contreras T.Autovalores generalizados como problema de optimización: Una opción fácil para aplicaciones en problemas físicos reales
GENERALIZED EIGENVALUES AS AN OPTIMIZATION PROBLEM:AN EASY OPTION FOR REAL APPLICATIONS IN PHYSICS PROBLEMS
Texto completo/Full text
Resumen
El
problema de cálculo de autovalores ha ido tomando cada vez mayor valor,
debido a las numerosas aplicaciones en las cuales se le ha encontrado
un significado importante a los autovalores de las matrices que
representan diversos sistemas reales. En aplicaciones específicas, como
en mecánica de fluidos, lo que interesa es obtener un autovalor extremo;
por tanto, el problema de autovalores puede ser abordado con un enfoque
diferente, proponiéndolo como un problema de optimización. En este
trabajo se describe la utilidad de calcular autovalores generalizados,
de la matriz resultante del sistema de ecuaciones discretas de una
aplicación real, como un problema de optimización empleando una función
objetivo de tipo polinomial propuesta en 1991 por Auchmuty.
Palabras clave: Autovalores generalizados, Optimización, Difusión-Convección.ABSTRACT
The problem of caculating eingenvalues has taken more importance, due to growing num- ber of applications involving matrices that represents several real system. In specific ap- plications as flow mechanics, the interest is gettings an extreme eingenvalues; so the op- timization approach emerge as a relevant option. In this work the utility of calculating generalized eingenvalues in the resulting matix from a discrete equation coming from a real applications, is described as an optimization problem. A polynomial type objective function proposed by Auchmuty is used.
Keywords: Generalized eingenvalues, optimization, difusion-connection
