IEEE Power & Energy Magazine - Spanish - March/April 2020 - 106

en la curva sólida del gráfico 2, un conductor ACSR o para altas temperaturas
con el mismo diámetro externo (DE)
produce un rango de capacidades térmicas según el valor de TCMÁX. Para
los ACSR cardinales (es decir, con área
de aluminio de 483 mm2 y trenzado
de 54/7) a 100 °C, la capacidad térmica es aproximadamente 1,250  A. Para
los ACSS cardinales (también con área
de aluminio de 483 mm2 y trenzado de
54/7) a 200 °C, la capacidad térmica es

de 1,900 A, aproximadamente un 50 %
más alto. Ambos conductores producen las mismas cargas estructurales de
viento transversal y ofrecen esencialmente la misma resistencia por unidad
de longitud.
Para satisfacer la curiosidad del lector en cuanto a las alternativas, la curva
discontinua muestra la capacidad de un
único Falcon ACSR más grande [806
mm2 (1,590 kcmil), trenzado de 54/19,
39.2 mm (DE de 1.545 pulgadas)] con

Bring your work

una capacidad térmica de 1,760 A a
100  °C debido a su menor resistencia
(40 % más baja) y mayor DE. La curva
punteada muestra la capacidad térmica de un haz ACSR de dos cardinales
con el doble de la capacidad de un solo
conductor cardinal. El gráfico deja claro que se pueden lograr capacidades
de línea más altas usando un ACSR de
gran tamaño o un haz de dos cardinales. Sin embargo, en ambos casos, los
costos del proyecto de la línea serían
significativamente más altos
debido al aumento de los costos de material del conductor
y mano de obra, así como a la
necesidad de estructuras más
robustas (por ejemplo, el uso
de un haz de dos cardinales
duplica las cargas de tensión
del conductor en las estructuras de tensión).
En cuanto a la confiabilidad probada de los conductores para altas temperaturas,
los ACSS están trenzados
con capas de cable de aluminio templado en lugar de cables de aluminio totalmente
duro, y han estado disponibles comercialmente durante
aproximadamente 50 años.
Su uso ha crecido a lo largo
de ese tiempo, aunque se han
utilizado sobre todo para mejorar la capacidad de líneas
existentes. Los conectores de
compresión de los ACSS son
similares a los conectores típicos de dos etapas para ACSR,
pero son ligeramente más largos. Aunque la tensión en las
capas de aluminio templado
de los ACSS es bastante baja
después de la instalación, no
hay evidencia de que el efecto
corona sea diferente a aquel en
los ACSR con el mismo DE.
En la literatura técnica,
se describen otros conductores para altas temperaturas.
En el folleto técnico 763 del
CIGRE, se definen varios tipos de conductores para altas
temperaturas y sus acróni-

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IEEE Power & Energy Magazine - Spanish - March/April 2020

Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - Spanish - March/April 2020

Contents
IEEE Power & Energy Magazine - Spanish - March/April 2020 - Cover1
IEEE Power & Energy Magazine - Spanish - March/April 2020 - Cover2
IEEE Power & Energy Magazine - Spanish - March/April 2020 - Contents
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IEEE Power & Energy Magazine - Spanish - March/April 2020 - Cover3
IEEE Power & Energy Magazine - Spanish - March/April 2020 - Cover4
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