Related Questions3 Items
Q1.MCQ
During a power failure, a domestic household uninterruptible power supply (UPS) supplies AC power to a limited number of lights and fans in various rooms. As per a Newton-Raphson load-flow formulation, the UPS would be represented as a
Q2.NUMERICAL
Consider a distribution feeder, with $R/X$ ratio of $5$. At the receiving end, a $350\text{ kVA}$ load is connected. The maximum voltage drop will occur from the sending end to the receiving end, when the power factor of the load is \\\\\\\\\\\ (round off to three decimal places).
Q3.NUMERICAL
The bus impedance matrix of a 3-bus system (in $pu$) is
$Z{\text{bus}} = \begin{bmatrix} j0.059 & j0.061 & j0.038 \\ j0.061 & j0.093 & j0.066 \\ j0.038 & j0.066 & j0.110 \end{bmatrix}$
A symmetrical fault (through a fault impedance of $j0.007\ pu$) occurs at bus 2. Neglecting pre-fault loading conditions, the voltage at bus 1, during the fault is \\\\\\\\\\\ $pu$ (round off to three decimal places).
Electrical and Electronic EngineeringPower SystemsNumerical Answer (NAT)2 Marks
Q3.
The bus impedance matrix of a 3-bus system (in pu) is
Zbus=j0.059j0.061j0.038j0.061j0.093j0.066j0.038j0.066j0.110
A symmetrical fault (through a fault impedance of j0.007 pu) occurs at bus 2. Neglecting pre-fault loading conditions, the voltage at bus 1, during the fault is ___________ pu (round off to three decimal places).
A
0.390