1
GATE EE 2024
MCQ (Single Correct Answer)
+1
-0.33
The figure shows the single line diagram of a 4-bus power network. Branches $b_1$, $b_2$, $b_3$, and $b_4$ have impedances $4z$, $z$, $2z$, and $4z$ per-unit (pu), respectively, where $z = r + jx$, with $r > 0$ and $x > 0$. The current drawn from each load bus (marked as arrows) is equal to $I$ pu, where $I \neq 0$. If the network is to operate with minimum loss, the branch that should be opened is
2
GATE EE 2018
Numerical
+1
-0
A 1000 $$ \times $$ 1000 bus admittance matrix for an electric power system has 8000 non-zero
elements. The minimum number of branches (transmission lines and transformers) in this
system are _____ (up to 2 decimal places).
Your input ____
3
GATE EE 2017 Set 1
Numerical
+1
-0
A 10-bus power system consists of four generator buses indexed as G1, G2, G3, G4 and six load buses indexed as L1, L2, L3, L4, L5, L6. The generator bus G1 is considered as slack bus, and the load buses L3 and L4 are voltage controlled buses. The generator at bus G2 cannot supply the required reactive power demand, and hence it is operating at its maximum reactive power limit. The number of non-linear equations required for solving the load flow problem using Newton-Raphson method in polar form is ____________.
Your input ____
4
GATE EE 2017 Set 1
MCQ (Single Correct Answer)
+1
-0.3
A $$3$$-bus power system is shown in the figure below, where the diagonal elements of $$Y$$-bus matrix are: $${Y_{11}} = - j12\,pu,\,\,\,{Y_{22}} = - j15\,pu\,\,$$ and $$\,{Y_{33}} = - j7\,pu.$$
The per unit values of the line reactance's $$p, q$$ and $$r$$ shown in the figure are
Questions Asked from Load Flow Studies (Marks 1)
Number in Brackets after Paper Indicates No. of Questions
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits