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GATE EE
Load Flow Studies
Power System Analysis
Previous Years Questions
START HERE
Marks 1
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A 1000 $$ \times $$ 1000 bus admittance matrix for an electric power system has 8000 non-zero elements. The minimum numb...
GATE EE 2018
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In a load flow problem solved by Newton-Raphson method with polar coordinates, the size of the Jacobian is $$\,100\,\, \...
GATE EE 2017 Set 2
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The figure show the per-phase representation of a phase-shifting transformer connected between buses $$1$$ and $$2,$$ wh...
GATE EE 2017 Set 2
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A 10-bus power system consists of four generator buses indexed as G1, G2, G3, G4 and six load buses indexed as L1, L2, L...
GATE EE 2017 Set 1
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A $$3$$-bus power system is shown in the figure below, where the diagonal elements of $$Y$$-bus matrix are: $${Y_{11}} =...
GATE EE 2017 Set 1
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In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in ...
GATE EE 2016 Set 1
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The magnitude of three-phase fault currents at buses A and B of a power system are 10 pu and 8 pu, respectively. Neglect...
GATE EE 2016 Set 1
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A $$3$$-bus power system network consists of $$3$$ transmission lines. The bus admittance matrix of the uncompensated sy...
GATE EE 2015 Set 2
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A 183-bus power system has 150PQ buses and 32 PV buses. In the general case, to obtain the load flow solution using Newt...
GATE EE 2014 Set 3
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The bus admittance matrix of a three-bus three-line system is $$y = j\left[ {\matrix{ { - 13} & {10} & 5 \cr...
GATE EE 2012
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A power system consists of $$300$$ buses out of which $$20$$ buses are generator buses, $$25$$ buses are the ones with r...
GATE EE 2003
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If the reference bus is changed in two load flow runs with same system data and power obtained for reference bus taken a...
GATE EE 1996
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In load-flow analysis, a voltage-controlled bus is treated as a load bus in subsequent iteration for a _________limit is...
GATE EE 1995
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In load flow analysis, the load connected at a bus is represented as
GATE EE 1993
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In load flow studies of a power system, the quantities specified at a voltage-controlled bus are ____________and________...
GATE EE 1992
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Marks 2
More
The per-unit power output of a salient-pole generator which is connected to an infinite bus, is given by the expression,...
GATE EE 2018
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The bus admittance matrix for a power system network is $$$\left[ {\matrix{ { - j39.9} & {j20} & {j20} \cr ...
GATE EE 2017 Set 1
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Determine the correctness or otherwise of the following Assertion (a) and the Reason (R). Assertion (A): Fast decoupled...
GATE EE 2015 Set 1
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In the following network, the voltage magnitudes at all buses are equal to $$1$$ p.u., the voltage phase angles are very...
GATE EE 2013
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For a power system network with $$n$$ nodes, $${Z_{33}}$$ of its bus impedance matrix is $$j0.5$$ per unit. The voltage...
GATE EE 2013
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In the following network, the voltage magnitudes at all buses are equal to $$1$$ p.u., the voltage phase angles are very...
GATE EE 2013
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A threeâ€“bus network is shown in the figure below indicating the p.u. impedances of each element The bus admittance mat...
GATE EE 2011
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For the $${Y_{bus}}$$ matrix of a $$4$$-bus system given in per unit, the buses having shunt elements are $$${Y_{BUS}} =...
GATE EE 2009
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For a power system the admittance and impedance matrices for the fault studies are as follows. $$$\eqalign{ & {Y_{...
GATE EE 2006
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For a power system the admittance and impedance matrices for the fault studies are as follows. $$$\eqalign{ & {Y_{...
GATE EE 2006
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The Gauss Seidel load flow method has following disadvantages. Tick the incorrect student.
GATE EE 2006
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The network shown in the given figure has impedances in p.u. as indicated. The diagonal element $$Y22$$ of the bus admit...
GATE EE 2005
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The bus impedance matrix of a $$4$$-bus power system is given by $$${Z_{bus}} = \left[ {\matrix{ {j0.3435} & {j0....
GATE EE 2003
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A power system consists of 2 areas (Area 1 and Area 2) connected by a single tie line (figure). It is required to carry ...
GATE EE 2002
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Marks 5
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Two transposed $$3$$ phase lines run parallel to each other. The equation describing the voltage drop in both lines is ...
GATE EE 2002
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For the $$Y$$-$$bus$$ matrix given in per unit values, where the first, second, third and fourth row refers to bus $$1, ...
GATE EE 2001
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