Power & Energy Magazine - Spanish - May/June 2019 - 32
tabla 3. El límite de carga después de la conversión de la línea de CA a CC.
Tensión de
CC (kV)
Límite de
carga (MW)
Aumento de
la capacidad
(%)
150
(3 × SIL)
100
300
100
2,702
290
(2 × SIL)
200
1,081
273
177/284.9
3,480
560
(1.4 × SIL)
320
2,227
298
250/402.3
4,179
1,200
(1.2 × SIL)
400
3,343
179
Tensión de CA
(kV)
Tipo del
conductor
Longitud
(mi/km)
Clasificación
térmica (A)
138
1192 ACSR
16/25.8
1,500
230
2-1351.5 ACSR
72/115.9
345
2-2493 ACAR
500
3-1351 ACSR
Límite
de carga
(MW)
SIL: carga de impedancia de sobretensión.
102
Carga 1
101
Enviar
↓
38 %
(188 MW)
38 %
(188 MW)
↓
264 MW
880 MW
229.9 kV
23 %
(113 MW)↓
103
Carga 2
229.4 kV
101 %
(502 MW)
↓
616 MW
Línea interrumpida
230 kV
Nota:
Los flujos de línea se muestran de la siguiente manera:
% de carga (carga MW)
gráfico 9. Sistema de muestra 1.
102
Carga 1
101
Enviar
← 100 %
(500 MW)
← 100 %
(500 MW)
645 MW
230 kV
← 100 %
(500 MW)
355 MW
103
Carga 2
1,500 MW
Línea
interrumpida
230 kV
polo negativo es prácticamente
insignificante, mientras que, para
las líneas de CA, debe tenerse en
cuenta la contribución de las tres
fases. Esto significa que se puede
usar un haz de conductores de
menor tamaño para que una línea
de CC cumpla con los mismos
requisitos de ruido que una línea
de CA. El ruido audible alcanzará
su punto álgido en condiciones
secas en las líneas de CC y en condiciones de lluvia en las líneas de
CA debido al efecto de las cargas
de espacio. La descarga de corona
de CC genera cargas de espacio que reducen la intensidad del
campo eléctrico entre las gotas de
lluvia y la superficie del conductor, por lo que la lluvia causa una
ligera reducción en el ruido audible de las líneas de CC. La descarga de corona de CA no causa
cargas de espacio constantes alrededor del conductor, y la presencia de gotas de lluvia en el campo
eléctrico de CA genera más descargas de corriente, lo que resulta
en un aumento del ruido audible.
Esta diferencia se debe considerar
al seleccionar el tamaño de haz de
conductores para CC.
Selección de la tensión
855 MW
230 kV
Nota:
Los flujos de línea se muestran de la siguiente manera:
% de carga (carga MW)
figura 10. Sistema de muestra 1 después de la conversión de línea de CA a CC.
32
ieee power & energy magazine
Como se debatió anteriormente,
los requisitos para el aislamiento
de la línea de CC son más estrictos que para las líneas de CA, por
lo que la longitud de los aisladores
de CA existentes es un parámetro
mayo/junio 2019
Power & Energy Magazine - Spanish - May/June 2019
Table of Contents for the Digital Edition of Power & Energy Magazine - Spanish - May/June 2019
Contents
Power & Energy Magazine - Spanish - May/June 2019 - Cover1
Power & Energy Magazine - Spanish - May/June 2019 - Cover2
Power & Energy Magazine - Spanish - May/June 2019 - Contents
Power & Energy Magazine - Spanish - May/June 2019 - 2
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Power & Energy Magazine - Spanish - May/June 2019 - Cover3
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