1
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
A $$800$$ $$kV$$ transmission line is having per phase line inductance of $$1.1$$ $$mH/km$$ and per phase line capacitance of $$11.68$$ $$nF/km.$$ Ignoring the length of the line, its ideal power transfer capability in $$MW$$ is
A
$$1204$$ $$MW$$
B
$$1504$$ $$MW$$
C
$$2085$$ $$MW$$
D
$$2606$$ $$MW$$
2
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
The generalized circuit constants of a $$3$$-phase, $$220$$ $$kV$$ rated voltage, medium length transmission line are $$A = D = 0.936 + j\,0.016 = 0.936\angle {0.98^ \circ }$$
$$B = 33.5 + j138 = 142.0\angle {76.4^ \circ }\,\Omega $$
$$\,C = \left( { - 5.18 + j914} \right) \times \,{10^{ - 6}}\,\Omega $$
If the load at the receiving end is $$50$$ MW at $$220$$ $$kV$$ with a power factor of 0.9 lagging, then magnitude of line to line sending end voltage should be
A
$$133.23$$ $$kV$$
B
$$220.00$$ $$kV$$
C
$$230.78$$ $$kV$$
D
$$246.30$$ $$kV$$
3
GATE EE 2003
MCQ (Single Correct Answer)
+2
-0.6
The ABCD parameters of a $$3$$-phase overhead transmission line are $$\,A = D = 0.9\angle {0^ \circ }.\,\,B = 200\,\angle {90^ \circ }\,\,\Omega \,\,\,$$ and $$\,\,C = 0.95\, \times \,\,{10^{ - 3}}\angle {90^ \circ }\,\,S.\,\,\,\,$$ At no-load condition, a shunt inductive reactor is connected at the receiving end of the line to limit the receiving end voltage to be equal to the sending-end voltage. The ohmic value of the reactor is
A
$$\infty \Omega $$
B
$$2000\,\Omega $$
C
$$105.26\,\Omega $$
D
$$1052.6\,\Omega $$
4
GATE EE 2003
MCQ (Single Correct Answer)
+2
-0.6
A surge of 20 kV magnitude travels along a lossless cable towards its junction with two identical lossless overhead transmission lines. The inductance and the capacitance of the cable are 0.4 mH and 0.5 $$\mu F$$ per km. The inductance and capacitance of the overhead transmission lines are 1.5 mH and 0.015 $$\mu F$$ per km. The magnitude of the voltage at the junction due to surge is
A
36.72 kV
B
18.36 kV
C
6.07 kV
D
33.93 kV
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