1
GATE EE 2014 Set 3
Numerical
+1
-0
A 183-bus power system has 150PQ buses and 32 PV buses. In the general case, to obtain the load flow solution using Newton-Raphson method in polar coordinates, the minimum number of simultaneous equations to be solved is ___________.
2
GATE EE 2012
+1
-0.3
The bus admittance matrix of a three-bus three-line system is
$$y = j\left[ {\matrix{ { - 13} & {10} & 5 \cr {10} & { - 18} & {10} \cr 5 & {10} & { - 13} \cr } } \right]$$
If each transmission line between the two buses is represented by an equivalent $$\pi \,$$ network, the magnitude of the shunt susceptance of the line connecting bus $$1$$ and $$2$$ is
A
$$4$$
B
$$2$$
C
$$1$$
D
$$0$$
3
GATE EE 2003
+1
-0.3
A power system consists of $$300$$ buses out of which $$20$$ buses are generator buses, $$25$$ buses are the ones with reactive power support and $$15$$ buses are the ones with fixed shunt capacitors. All the other buses are load buses. It is proposed to perform a load flow analysis for the system using Newton-Raphson method. The size of the Newton-Raphson Jacobian matrix is
A
$$553 \times 553$$
B
$$540 \times 540$$
C
$$555 \times 555$$
D
$$554 \times 554$$
4
GATE EE 1996
+1
-0.3
If the reference bus is changed in two load flow runs with same system data and power obtained for reference bus taken as specified P and Q in the latter run
A
The system losses will be unchanged but complex bus voltages will change.
B
The system losses will change but complex bus voltages remain unchanged.
C
The system losses as well as complex bus voltage will change.
D
The system losses as well as complex bus voltage will be unchanged.
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