1
GATE EE 2005
MCQ (Single Correct Answer)
+2
-0.6
At a $$220$$ kV substation of a power system, it is given that the three-phase fault level is $$4000$$ MVA and single-line to ground fault level is $$5000$$ MVA. Neglecting the resistance and the shunt susceptances of the system.

The positive sequence driving point reactance at the bus is

A
$$2.5\,\Omega $$
B
$$4.033\,\Omega $$
C
$$5.5\,\Omega $$
D
$$12.1\,\Omega $$
2
GATE EE 2005
MCQ (Single Correct Answer)
+2
-0.6
The parameters of transposed overhead transmission line are given as: self reactance $${X_s} = 0.4\,\,\Omega /km$$ and Mutual reactance $$\,{X_m} = 0.1\,\,\Omega /km.\,\,$$ The positive sequence reactance $${X_1}$$ and zero sequence reactance $${X_0}$$ respectively in $$\Omega /km$$ are
A
$$0.3, 0.2$$
B
$$0.5, 0.2$$
C
$$0.5, 0.6$$
D
$$0.3, 0.6$$
3
GATE EE 2005
MCQ (Single Correct Answer)
+2
-0.6
At a $$220$$ kV substation of a power system, it is given that the three-phase fault level is $$4000$$ MVA and single-line to ground fault level is $$5000$$ MVA. Neglecting the resistance and the shunt susceptances of the system.

The zero sequence driving point reactance at the bus is

A
$$2.2\,\Omega $$
B
$$4.84\,\Omega $$
C
$$18.18\,\Omega $$
D
$$22.72\,\Omega $$
4
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
A 500 MVA, 50 Hz, 3-phase turbo-generator produces power at 22 kV. Generator is Y-connected and its neutral is solidly grounded. Its sequence reactances are X1 = X2 = 0.15 and X0 = 0.05 pu. it is operating at rated voltage and disconnected from the rest of the system (no load). The magnitude of the sub-transient line current for single line ground fault at the generator terminal in pu will be
A
2.851
B
3.333
C
6.667
D
8.553
GATE EE Subjects
EXAM MAP