IEEE Power & Energy Magazine - Spanish - May/June 2021 - 55

Redes secundarias
Topología de las redes secundarias
Las redes secundarias se agrupan en dos categorías principales:
malladas y radiales. Se describen brevemente a continuación.
Redes
secundarias malladas
Las redes secundarias malladas son utilizadas para abastecer
a áreas urbanas densas, como los centros urbanos y los
distritos comerciales. A veces son llamadas redes de calles
porque los cables de red generalmente se colocan debajo y,
por lo tanto, siguen a las calles de la zona. También pueden
ser denominadas redes de área y redes centrales. La
figura 1 (a) muestra la topología típica de una red secundaria
mallada. En la parte superior se observa un único servicio
trifásico principal, pero una red mallada puede tener más
de uno. Esta red secundaria mallada tiene N alimentadores
primarios y K secundarios, todos trifásicos. El servicio prinP,
Q
P, Q
CB
CB P, Q
Alimentador principal 1 (MT)
Alimentador principal N (MT)
Unidad de red
Unidad de red
A alimentador principal
P, Q
Unidad
de red
Cargas
Cargas
NP
P, Q
P, Q
78
A alimentador secundario
(b)
Alimentador
secundario K (BT)
Cargas
(a)
Cargas
Cargas
P, Q
Unidad
de red
Alimentador
secundario 1 (BT)
Unidad de red
=
32
NT
cipal y los alimentadores primarios funcionan todos a media
tensión (una tensión de distribución). Cada alimentador principal
tiene una conexión a través de una unidad de red a cada
alimentador secundario. La figura 1 (b) muestra un esquema
de una unidad de red. Una unidad de red es un subsistema
que contiene el transformador de red trifásico que pasa la
tensión de media a baja tensión, o una tensión secundaria y
un protector de red que incluye un relé de potencia direccional
(definido en el Estándar C37.2-2008 del IEEE como un
dispositivo de " función 32 del IEEE " ), un relé de ángulo de
fase ( " función 78 del IEEE " ) y el interruptor asociado. Los
alimentadores secundarios normalmente funcionan con una
tensión de utilización (generalmente 120/208 V o, en algunos
casos, 480/277 V).
Redes secundarias radiales
Una red secundaria radial es un sistema más pequeño diseñado
a fin de proporcionar múltiples rutas redundantes para
el flujo eléctrico desde un circuito de servicio primario a una
Servicio principal (MT)
figura 1. Una red secundaria mallada típica sin FED: (a) la topología de red, mostrando las direcciones del flujo de potencia
activa (P) y reactiva (Q), y (b) una unidad de red. CB: interruptor; BT: baja tensión; MT: media tensión; NP: protector
de red; NT: transformador de red.
mayo/junio 2021i
eee power & energy magazine
55
Cargas
Cargas

IEEE Power & Energy Magazine - Spanish - May/June 2021

Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - Spanish - May/June 2021

Contents
IEEE Power & Energy Magazine - Spanish - May/June 2021 - Cover1
IEEE Power & Energy Magazine - Spanish - May/June 2021 - Cover2
IEEE Power & Energy Magazine - Spanish - May/June 2021 - Contents
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IEEE Power & Energy Magazine - Spanish - May/June 2021 - Cover3
IEEE Power & Energy Magazine - Spanish - May/June 2021 - Cover4
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