8 PARCIAL 2021-ALTA TENSION (1)
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Multan College of Education, Multan *
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Course
112.MFL
Subject
Electrical Engineering
Date
Nov 24, 2024
Type
Pages
6
Uploaded by MagistrateSteelManatee
Question
1
Notyetanswered
Markedoutof1.00
V1
Flagquestion
Las
centrales
de
generacion
como
elementos
clave
del
sistema
electrico
de
alta
tension
estan
limitadas
a
tensiones
de
generacion
que
por
lo
general
no
superan
los
36
kV
debido
a:
~
a.
Lassobretensiones
atmosféricas
©
b.
Lafrecuencia
del
generador
¢.
Lageneracion
con
generadores
sincronos
©
d.
Losniveles
de
tensién
de
la
red
e.
Elaislamiento
en
sus
generadores
Question
2
Notyetanzwered
Markedoutof1.00
Y
Flagquestion
En
el
subsuelo
de
una
subestacion
se
encuentra
tendida
que
tiende
a
mantener
el
suelo
de
la
estaciéon
con
caracteristicas
equipotenciales,
para
evitar
peligros
a
las
personas
y
controlar
interferencias
electromagnéticas.
a.
Sistema
antisismico
-
b.
sistema
de
galerias
y
conductores
c.
sistemade
puesta
atierra
~
d.
sistemadedrenaje
-~
e.
Sistema
contraincendios
Question
3
Notyetanzwered
Marked
cutof
2.00
V"
Flag
gueztion
Se
tiene
una
LT
de
60km
con
una
DMG
=10.08m
Radio
del
conductor
=
10mm
,
Considerando
que
la
linea
trifasica
tiene
2
conductores
por
fase
y
un
radio
equivalente
de
63.25mm,
una
resistencia
de
conductor
de
0.33
ohms/km
una
tension
de
115
kV,
una
frecuencia
de
60
Hz.
Calcule
laimpedanciade
la
Ll
porfase
Z=R+jX
O
&
Z=19.8+j23.50
Ob.
Z2=99+j324
Oc
Z=198+j2053
Od.
7=19.8+)32.4
®
e
Z=99+j2350
Question4
Notyetanswered
Marked
cutof
1.00
V"
Flag
question
Las
topologias
de
los
sistemas
de
distribucion
de
energia
pueden
ser:
-
a.
Monofasicas,
trifésica
y
polifasica
®
b.
Radial,
en
anillo,
enmallado
~
c.
Delta,
estrella
y
en
zigzag
-
d.
De
corriente
continua
y
corriente
alterna
-
e.
Aereaysubterranea
Question
5
Notystanzwered
Marked
cutof
1.00
\"
Flag
question
Se
define
como
el
conductor
de
baja
impedancia
que
se
conecta
a
varios
circuitos.
|
a.
Transformadorde
tension
~
b.
Barras
.
c.
Alimentador
-
d.
Acometida
-
e.
Seccionador
aTrecuencias
ae
dDUHz
y
DUHZ
ha
propiciaqo
el
aesarrolio
ae
sistemas
ae
energia
en
corriente
continua.
Este
mismo
criterio
ha
sido
utilizado
para
sistemas
que
no
tienen
la
misma
regulacion
de
frecuencia
y
que
requieren
ser
interconectados.
B)
Una
aplicacion
propuesta
para
la
interconexiéon
con
sistemas
de
corriente
continua
en
alta
tension
por
algunos
paises
nordicos
ha
sido
posible
gracias
a
las
altas
capacitancias
logradas
por
los
sistemas
de
conversion
de
energia
los
cuales
han
mantenido
cargados
los
cables
aun
con
potencia
(activa)
transmitida
nula.
C)
Existen
instalaciones
submarinas
en
corriente
continua
con
un
solo
cable
y
que
utilizan
el
agua
como
fuente
de
retorno
permanente.
En
dichas
instalaciones
la
puesta
a
tierra
juega
un
papel
fundamental
para
garantizar
el
buen
funcionamiento
del
sistema
utilizando
el
agua
como
conductor
de
retorno.
D)
En
latransmisién
de
energia
con
sistemas
de
corriente
continua
pueden
utilizarse
sistemas
aéreos
monopolares,
bipolares
y
tripolares
para
las
interconexiones
con
lineas
aéreas
largas.
E)
Elmayor
problema
de
la
interconexién
de
con
sistemas
de
corriente
continua
es
la
imposibilidad
de
transmitir
potencia
reactiva
debido
a
|la
naturaleza
del
sistema.
©
a.
VVVFF
®
b.
WVFV
7
e
VFVFV
“~
d.
VFVFF
e.
FFVFV
Question
8
Not
yst
anzswerad
Marked
out
of
.00
V"
Flag
question
Un
elemento
fundamental
en
la
proteccion
contra
sobretensiones
en
las
subestaciones
y
los
sistemas
de
distribucion
son:
-
a.
Pararrayos
e
interruptores
de
potencia
“
b.
Seccionadores
<
c.
Transformadores
de
tension
~
d.
Interruptor
de
potencia
y
seccionadores
-
e.
Pararrayos
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