1
GATE EE 2003
MCQ (Single Correct Answer)
+1
-0.3
A $$3$$-phase, $$11$$-$$kV$$ generator feeds power to a constant power unity power factor load of $$100$$ $$MW$$ through a $$3$$-phase transmission line. The line-to-line voltage at the terminals of the machine is maintained constant at $$11$$ $$kV$$. The per unit positive sequence impedance of the line based on $$100$$ $$MVA$$ and $$11$$ $$kV$$ is $$j$$ $$0.2$$. The line to line voltage at the load terminals is measured to be less than $$11$$ $$kV$$. The total reactive power to be injected at the terminals of the load to increase the line-to-line voltage at the load terminals to $$11$$ $$kV$$ is
A
$$100$$ MVAR
B
$$10.1$$ MVAR
C
$$-100$$ MVAR
D
$$-10.1$$ MVAR
2
GATE EE 2003
MCQ (Single Correct Answer)
+1
-0.3
Bundled conductors are mainly used in high voltage overhead transmission lines to
A
Reduce transmission line losses
B
Increase mechanical strength of the line
C
Reduce corona
D
Reduce sag
3
GATE EE 2003
MCQ (Single Correct Answer)
+1
-0.3
A round rotor generator with internal voltage $${E_1} = 2.0\,\,$$ p.u.and $$\,X = 1.1\,\,$$ p.u. is connected to a round rotor synchronous motor with internal voltage $$\,\,{E_2} = 1.3\,\,$$ p.u. and $$\,X = 1.2\,\,$$ p.u. The reactance of the line connecting the generator to the motor is $$0.5$$ p.u. when the generator supplies $$0.5$$ p.u. power, the rotor angle difference between the machines will be
A
$${57.42^ \circ }$$
B
$${1^ \circ }$$
C
$${32.58^ \circ }$$
D
$${122.58^ \circ }$$
4
GATE EE 2003
MCQ (Single Correct Answer)
+1
-0.3
Choose two appropriate auxiliary components of a HVDC transmission system from the following
$$1.$$ D.C. line inductor
$$2.$$ A.C. line inductor
$$3.$$ Reactive power sources
$$4.$$ Distance relays on D.C. line
$$5.$$ Series capacitance of A.C. line
A
1 and 2
B
1 and 3
C
2 and 4
D
4 and 5
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