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Hot questions in Power Systems
0
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0
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1
GATE2015123
The primary mmf is least affected by the secondary terminal conditions in a Power transformer. Potential transformer. Current transformer. Distribution transformer.
asked
Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2015ee1
primarymmf
turnratio
0
votes
0
answers
2
GATE2014315
For a fully transposed transmission line positive, negative and zero sequence impedances are equal positive and negative sequence impedances are equal zero and positive sequence impedances are equal negative and zero sequence impedances are equal
asked
Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2014ee3
transmissionline
sequences
0
votes
0
answers
3
GATE2014114
The undesirable property of an electrical insulating material is high dielectric strength High relative permittivity high thermal conductivity High insulation resistivity
asked
Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2014ee1
insulation
powersystemanalysis
conductingwires
0
votes
0
answers
4
GATE2014216
Shunt reactors are sometimes used in high voltage transmission systems to limit the short circuit current through the line. compensate for the series reactance of the line under heavily loaded condition. limit overvoltages at the load side under lightly loaded condition. compensate for the voltage drop in the line under heavily loaded condition.
asked
Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2014ee2
transmission
system
seriesreactors
0
votes
0
answers
5
GATE20138
A singlephase load is supplied by a singlephase voltage source. If the current flowing from the load to the source is $10\angle 150^0\: A$ and if the voltage at the load terminals is $100\angle 60^0\: V$, then the Load ... Load absorbs real power and absorbs reactive power. Load delivers real power and delivers reactive power. Load delivers real power and absorbs reactive power.
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Feb 12, 2017
in
Power Systems
by
piyag476
(
1.5k
points)
gate2013ee
reactivepower
realpower
0
votes
0
answers
6
GATE2014119
Power consumed by a balanced $3$phase, $3$wire load is measured by the two wattmeter method. The first wattmeter reads twice that of the second. Then the load impedance angle in radians is $\pi /12$ $\pi /8$ $\pi /6$ $\pi /3$
asked
Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2014ee1
balancedsystem
load
impedance
0
votes
0
answers
7
GATE2014353
A threephase fully controlled bridge converter is fed through stardelta transformer as shown in the figure. The converter is operated at a firing angle of $300$. Assuming the load current ($I_0)$ to be virtually constant at $1$ $p.u$. and transformer to be an ideal one, the input phase current waveform is
asked
Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2014ee3
starconnection
deltaconnection
0
votes
0
answers
8
GATE2015141
Consider the economic dispatch problem for a power plant having two generating units. The fuel costs in Rs/MWh along with the generation limits for the two units are given below: $C_{1}(P_{1})=0.01P^{2}_{1}+30P_{1}+10 ; 100MW \leq P_{1}\leq 150MW$ ... $200$ MW is _______.
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Feb 12, 2017
in
Power Systems
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makhdoom ghaya
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9.3k
points)
gate2015ee1
economicdispatch
incrementalcost
numericalanswers
0
votes
0
answers
9
GATE201526
A $3$phase balanced load which has a power factor of $0.707$ is connected to a balanced supply. The power consumed by the load is $5$ kW. The power is measured by the twowattmeter method. The readings of the two wattmeters are $3.94$ kW and $1.06$ kW $2.50$ kW and $2.50$ kW $5.00$ kW and $0.00$ kW $2.96$ kW and $2.04$ kW
asked
Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2015ee2
balancedoperation
powermeasurement
0
votes
0
answers
10
GATE2015144
A sustained threephase fault occurs in the power system shown in the figure. The current and voltage phasors during the fault (on a common reference), after the natural transients have died down, are also shown. Where is the fault located? Location $P$ Location $Q$ Location $R$ Location $S$
asked
Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2015ee1
singlelinediagram
faultanalysis
0
votes
0
answers
11
GATE2014316
A $183$bus power system has $150$ $PQ$ buses and $32$ $PV$ buses. In the general case, to obtain the load flow solution using NewtonRaphson method in polar coordinates, the minimum number of simultaneous equations to be solved is ___________.
asked
Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2014ee3
slackbus
linelosses
numericalanswers
0
votes
0
answers
12
GATE2014116
A $2$bus system and corresponding zero sequence network are shown in the figure. The transformers $T_1$and $T_2$ are connected as
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Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2014ee1
sequencenetworks
bussystem
0
votes
0
answers
13
GATE2015117
Base load power plants are P: wind farms. Q: runofriver plants. R: nuclear power plants. S: diesel power plants. P, Q and S only P, R and S only P, Q and R only Q and R only
asked
Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2015ee1
powerplants
powergeneration
0
votes
0
answers
14
GATE201333
For a power system network with $n$ nodes, $Z_{33}$ of its bus impedance matrix is $j0.5$ per unit. The voltage at node $3$ is $1.3\angle 10^{\circ}$ per unit. If a capacitor having reactance of $j3.5$ per unit is now added to the network between node $3$ and the ... unit is $0.325\angle 100^{\circ}$ $0.325\angle 80^{\circ}$ $0.371\angle 100^{\circ}$ $0.433\angle 80^{\circ}$
asked
Feb 12, 2017
in
Power Systems
by
piyag476
(
1.5k
points)
gate2013ee
busimpedancematrix
source
0
votes
0
answers
15
GATE2015216
The synchronous generator shown in the figure is supplying active power to an infinite bus via two short, lossless transmission lines, and is initially in steady state. The mechanical power input to the generator and the voltage magnitude $E$ are constant. If one ... transient. Which one of the following waveforms of the rotor angle $\delta$ shows the transient correctly?
asked
Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2015ee2
powersystemprotection
sourceofreactivepower
0
votes
0
answers
16
GATE2014314
In a long transmission line with $r$,$l$,$g$ and $c$ are the resistance, inductance, shunt conductance and capacitance per unit length, respectively, the condition for distortionless transmission is $rc=lg$ $r=\sqrt{l/c}$ $rg=lc$ $g=\sqrt{c/l}$
asked
Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2014ee3
longtransmissionline
distortion
0
votes
0
answers
17
GATE2014115
Threephase to ground fault takes place at locations $F_1$ and $F_2$ in the system shown in the figure If the fault takes place at location $F_1$, then the voltage and the current at bus $A$ are $V_{F1}$ and $I_{F1}$ respectively. If the fault takes place at location $F_2$, then the ... $I_{F1}$ and $V_{F2}$ leads $I_{F2}$ $V_{F1}$ lags $I_{F1}$ and $V_{F2}$ lags $I_{F2}$
asked
Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2014ee1
singlelinediagram
powerfactor
0
votes
0
answers
18
GATE201426
Two identical coupled inductors are connected in series. The measured inductances for the two possible series connections are $380$ $μH$ and $240$ $μH$. Their mutual inductance in $μH$ is ________
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Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
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9.3k
points)
gate2014ee2
passiveloads
seriesconnection
numericalanswers
0
votes
0
answers
19
GATE201353
In the following network, the voltage magnitudes at all buses are equal to $1 p.u.$, the voltage phase angles are very small, and the line resistances are negligible. All the line reactances are equal to $j1$ $\Omega.$ If the base impedance and the linetoline ... respectively, then the real power in $MW$ delivered by the generator connected at the slack bus is $10$ $0$ $10$ $20$
asked
Feb 12, 2017
in
Power Systems
by
piyag476
(
1.5k
points)
gate2013ee
powerflowanalysis
buses
0
votes
0
answers
20
GATE2014131
In an unbalanced three phase system, phase current $I_a=1\angle (90^{\circ})\: \text{pu}$ , negative sequence current $I_{b2}=4\angle (150^{\circ})\: \text{pu}$, zero sequence current $I_{c0}=3\angle 90^{\circ}\: \text{pu}.$ The magnitude of phase current $I_b$ in $\text{pu}$ is $1.00$ $7.81$ $11.53$ $13.00$
asked
Feb 12, 2017
in
Power Systems
by
makhdoom ghaya
(
9.3k
points)
gate2014ee1
unbalancedsystem
sequencenetworks
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