GO Electrical
Ask us anything
Toggle navigation
GO Electrical
Email or Username
Password
Remember
Login
Register

I forgot my password
Activity
Questions
Hot!
Unanswered
Tags
Subjects
Users
Ask
New Blog
Blogs
Exams
Hot questions in Power Systems
0
votes
0
answers
1
GATE2016141
A $30 MVA$, $3$phase, $50 Hz$, $13.8 kV$, starconnected synchronous generator has positive, negative and zero sequence reactances, $15$%, $15$% and $5$% respectively. A reactance $(X_{n})$ is connected between the neutral of the generator and ground. A double ... $X_{n}$ (in p.u.) that will limit the positive sequence generator current to $4270$ A is ________.
asked
Jan 30, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2016ee1
slip
powersystemfaults
sequencenetworks
numericalanswers
0
votes
0
answers
2
GATE2016215
The inductance and capacitance of a $400$ kV, threephase, $50$ Hz lossless transmission line are $1.6$ mH/km/phase and $10$ nF/km/phase respectively. The sending end voltage is maintained at $400$ kV. To maintain a voltage of $400$ kV at the receiving end, when the line is delivering $300$ MW load, the shunt compensation required is Capacitive Inductive Resistive Zero
asked
Jan 30, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2016ee2
surgeimpedence
steadystateoperation
equivalentcircuit
stabilitylimits
0
votes
0
answers
3
GATE2016140
A threephase cable is supplying $800 kW$ and $600 kVAr$ to an inductive load. It is intended to supply an additional resistive load of $100 kW$ through the same cable without increasing the heat dissipation in the cable, by providing a threephase bank of ... the line voltage is $3.3 kV$, $50 Hz$, the capacitance per phase of the bank, expressed in microfarads, is ________.
asked
Jan 30, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2016ee1
activepower
reactivepower
heatlosses
numericalanswers
0
votes
0
answers
4
GATE2016244
A singlephase, $2$ kVA, $100/200$ V transformer is reconnected as an autotransformer such that its $kVA$ rating is maximum. The new rating, in $kVA$, is ______.
asked
Jan 30, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2016ee2
autotransformer
rating
numericalanswers
0
votes
0
answers
5
GATE2016151
A singlephase transmission line has two conductors each of $10$ mm radius. These are fixed at a centertocenter distance of $1$ m in a horizontal plane. This is now converted to a threephase transmission line by introducing a third conductor of the same ... $5$% more than that of the inductance per conductor of the singlephase system. The distance $D$, in meters, is _________.
asked
Jan 30, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2016ee1
transmissionsystemdesign
transmissionparameters
transposition
numericalanswers
0
votes
0
answers
6
GATE2016254
An energy meter, having meter constant of $1200$ revolutions/kWh, makes $20$ revolutions in $30$ seconds for a constant load. The load, in $kW$, is __________.
asked
Jan 30, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2016ee2
energymeter
revolutions
constantload
numericalanswers
0
votes
0
answers
7
GATE2016119
In a $100$ bus power system, there are $10$ generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the $PV$ buses are converted to $PQ$ type. In this iteration, The number of ... voltage magnitudes decreases by two. The number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.
asked
Jan 30, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2016ee1
powersystemoperation
iterations
jacobimatrix
0
votes
0
answers
8
GATE2016142
If the star side of the stardelta transformer shown in the figure is excited by a negative sequence voltage, then $V_{AB}$ leads $V_{ab}$ by $60$º $V_{AB}$ lags $V_{ab}$ by $60$º $V_{AB}$ leads $V_{ab}$ by $30$º $V_{AB}$ lags $V_{ab}$ by $30$º
asked
Jan 30, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2016ee1
sequencevoltages
startodeltaconversion
120phaseshift
0
votes
0
answers
9
GATE2016149
A singlephase, $22 kVA, 2200 V/ 220 V, 50 Hz$, distribution transformer is to be connected as an autotransformer to get an output voltage of $2420 V$. Its maximum $kVA$ rating as an autotransformer is $22$ $24.2$ $242$ $2420$
asked
Jan 30, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2016ee1
leakagereactance
transformationratio
magnetizationbranch
0
votes
0
answers
10
GATE2016214
A power system has $100$ buses including $10$ generator buses. For the load flow analysis using NewtonRaphson method in polar coordinates, the size of the Jacobian is $189 \times 189$ $100 \times 100$ $90 \times 90$ $180 \times 180$
asked
Jan 30, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2016ee2
taylor'stheorem
busadmittancematrix
pqbuses
pvbuses
accelerationfactor
0
votes
0
answers
11
GATE2016251
Three singlephase transformers are connected to form a deltastar threephase transformer of $110$ kV/ $11$ kV. The transformer supplies at $11$ kV a load of $8$ MW at $0.8$ p.f. lagging to a nearby plant. Neglect the transformer losses. The ratio of phase currents in delta side to star side is $1 : 10\sqrt{3}$ $10\sqrt{3} : 1$ $1 : 10$ $\sqrt{3} : 10$
asked
Jan 30, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2016ee2
deltastarconnections
transformerlosses
Page:
« prev
1
2
3
4
Welcome to GATE Overflow, Electrical, where you can ask questions and receive answers from other members of the community.
Follow @csegate
Gatecse
912
questions
38
answers
10
comments
27,600
users