1
GATE EE 2005
MCQ (Single Correct Answer)
+2
-0.6
The network shown in the given figure has impedances in p.u. as indicated. The diagonal element $$Y22$$ of the bus admittance matrix $${Y_{BUS}}$$ of the network is GATE EE 2005 Power System Analysis - Load Flow Studies Question 18 English
A
$$-j$$ $$19.8$$
B
$$+j$$ $$20.0$$
C
$$+j$$ $$0.2$$
D
$$-j$$ $$19.95$$
2
GATE EE 2003
MCQ (Single Correct Answer)
+2
-0.6
The bus impedance matrix of a $$4$$-bus power system is given by $$${Z_{bus}} = \left[ {\matrix{ {j0.3435} & {j0.2860} & {j0.2723} & {j0.277} \cr {j0.2860} & {j0.3408} & {j0.2586} & {j0.2414} \cr {j0.2723} & {j0.2586} & {j0.2791} & {j0.2209} \cr {j0.2277} & {j0.2414} & {j0.2209} & {j0.2791} \cr } } \right]$$$

A branch having an impedance of $$j0.2\Omega $$ is connected between bus $$2$$ and the reference. Then the values of $${Z_{22,new}}$$ and $${Z_{23,new}}$$ of the bus impedance matrix of the modified network are respectively

A
$$j0.5408\,\Omega \,\,\,$$ and $$\,\,\,j0.4586\,\Omega $$
B
$$j0.1260\,\Omega \,\,\,$$ and $$\,\,\,j0.0956\,\Omega $$
C
$$j0.5408\,\Omega \,\,\,$$ and $$\,\,\,j0.0956\,\Omega $$
D
$$j0.1260\,\Omega \,\,\,$$ and $$\,\,\,j0.1630\,\Omega $$
3
GATE EE 2002
MCQ (Single Correct Answer)
+2
-0.6
A power system consists of 2 areas (Area 1 and Area 2) connected by a single tie line (figure). It is required to carry out a load flow study on this system. While entering the network data, the tie-line data (connectivity and parameters) is inadvertently left out. If the load flow program is run with this incomplete data. GATE EE 2002 Power System Analysis - Load Flow Studies Question 20 English
A
The load-flow will converge only if the slack bus is specified in Area 1
B
The load-flow will converge only if the slack bus is specified in Area 2
C
The load-flow will converge if the slack bus is specified in either Area 1 or Area 2
D
The load-flow will not converge if only one slack bus is specified.
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