1
GATE EE 2018
+2
-0.67
Consider the two bus power system network with given loads as shown in the figure. All the values shown in the figure are in per unit. The reactive power supplied by generator G1 and G2 are QG1 and QG2 respectively. The per unit values of QG1, QG2, and line reactive power loss (Qloss) respectively are
A
5. 00, 12.68, 2.68
B
6.34, 10.00, 1.34
C
6.34, 11.34, 2.68
D
5.00, 11.34, 1.34
2
GATE EE 2017 Set 1
+2
-0.6
A load is supplied by a $$230$$ $$V,$$ $$50$$ $$Hz$$ source. The active power $$P$$ and the reactive power $$Q$$ consumed by the load are such that $$1$$ $$kW$$ $$\le P \le 2\,kW\,\,$$ and $$\,1\,\,kVAR \le 2\,\,kVAR.\,\,$$ A capacitor connected across the load for power factor correction generates $$1$$ $$kVAR$$ reactive power. The worst case power factor after power factor correction is
A
$$0.447$$ lag
B
$$0.707$$ lag
C
$$0.894$$ lag
D
$$1$$
3
GATE EE 2017 Set 2
Numerical
+2
-0
A 3-phase 50 Hz generator supplies power of 3 MW at 17.32 kV to a balanced 3-phase inductive load through an overhead line. The per phase line resistance and reactance are 0.25 $$\Omega$$ and 3.925 $$\Omega$$ respectively. If the voltage at the generator terminal is 17.87 kV, the power factor of the load is ________.
4
GATE EE 2017 Set 2
Numerical
+2
-0
Consider an overhead transmission line with $$3$$-phase, $$50$$ $$Hz$$ balanced system with conductors located at the vertices of an equilateral triangle of length $$\,{D_{ab}} = {D_{bc}} = {D_{ca}} = 1\,\,\,$$ m as shown in figure below. The resistance of the conductors are neglected. The geometric mean radius (GMR) of each conductor is $$0.01$$ $$m$$. Neglect the effect of ground, the magnitude of positive sequence reactance in $$\,\Omega$$/$$km$$ (rounded off to three decimal places) is ________________.