Power & Energy Magazine - Spanish - May/June 2019 - 108

Limitación de la corriente de falla
Los CB híbridos de CC también pueden actuar como limitadores de corriente de falla de CC. Al emplear el control
de ENCENDIDO/APAGADO de los módulos individuales
en la válvula T2, se puede variar el número de protectores
insertados, los cuales pueden regular la corriente. Este modo
de funcionamiento está limitado por la capacidad térmica
de los absorbentes de energía y lo más probable es que solo
pueda ser logrado durante cortos períodos de tiempo.
Este modo de funcionamiento con limitación de fallas
puede ser beneficioso en algunas aplicaciones. Puede ayudar, por ejemplo, para
1) limitar las corrientes de falla, lo cual permite un tiempo de respuesta adicional para la eliminación de fallas
por parte de otros CB de CC instalados en otras líneas
en una red de CC (en términos prácticos, los CB de
CC o sistemas de protección en las otras líneas pueden
tener tiempos de respuesta más lentos)

2) limitar las corrientes de irrupción al conectar las líneas de CC, lo cual elimina la necesidad de resistores
principales en los CB de CC.

CB de CC instalados en China
CB híbrido de CC instalado en el sistema de
varias terminales de Zhoushan

Entre las islas del archipiélago de Zhoushan, las islas que consumen más energía incluyen la isla principal de Zhoushan,
seguida por las islas de Daishan, Qushan, Yangshan y Sijiao.
La carga anual de la red eléctrica de Zhoushan alcanzó los
780 MW en 2010, y se estima que alcanzará los 2,000 MW
en 2020 como resultado de la mayor demanda generada por
el desarrollo económico.
Un proyecto de VSC de HVdc de cinco terminales y ±
200 kV, construido por State Grid Corporation de China,
comenzó su operación comercial en 2014. Transmite energía desde tierra firme hacia las cinco
islas. Este proyecto utiliza un convertidor modular multinivel y se
200 MW
100 MW
Estación Sucheng
Estación Jinniu
conecta mediante cables submarinos. Durante el funcionamiento
Cable
normal, la estación convertidora
Dinghai en la isla Zhoushan proDisyuntor de
porciona el control de tensión de
CC
la CC, y las otras estaciones funcionan en los modos de control
Línea aérea
de potencia. Como resultado, la
potencia fluye desde la estación
Dinghai a las otras estaciones.
Debido a la falta de CB de HVdc,
50 MW
la eliminación de una falla de
Estación Qingao
CC fue lograda originalmente
mediante operaciones de acción
gráfico 8. Un diagrama que muestra el sistema de transmisión de HVdc de tres
lenta por parte de los disyuntores
terminales en Nan'ao con un CB mecánico de CC instalado.

Absorbente de energía
MOV
VI1
Rama principal

Cj

Rj

VI2
Cj

Rx

Rj
Rx

VI3

VI4

Cj Rj

Cj Rj

Rx

Rx

UPS

C2
Ramas
de inyección de
corriente

Rc Dc
Tc

L2

Rama
principal
Lado de HV

M

Lado de LV

L1
C1

SCR

Ramas
de inyección de
corriente

Absorbente
de energía

D

(a)

(b)

gráfico 9. (a) La topología y (b) un prototipo para un CB mecánico de HVdc de 160 kV.
108

ieee power & energy magazine

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
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Power & Energy Magazine - Spanish - May/June 2019 - Cover3
Power & Energy Magazine - Spanish - May/June 2019 - Cover4
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