MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Z-Bus Building Algorithm

Consider the ...

Question

Consider the network shown in the figure. The bus numbers and impedances are marked. A $3 - ϕ$ short circuit fault occurs at bus 2. The subtransient current of the fault in per unit is ___.

0.33

Open in App

Solution

The correct option is A 0.33
$Z_{b u s} = ⎡ ⎢ ⎣ \begin{matrix} 2.0 & 0 & 0 0 & 3.0 & 3.0 0 & 3.0 & 7.0 \end{matrix} ⎤ ⎥ ⎦$

A 3 $ϕ$ fault on bus 2, $I_{f} = \frac{1.0}{Z_{22}}$

$= \frac{1.0}{3.0}$

= 0.33 p.u

Suggest Corrections

thumbs-up

0

Similar questions

Q. Consider the network shown. Bus numbers and impedances are marked. An element having an impedance of

0.8 Ω

is connected between bus 2 and reference bus.

Z_{22 n e w}

Z_{b u s}

Z_{B U S} = ⎡ ⎢ ⎣ \begin{matrix} 0.1 & 0.1 & 0.1 0.1 & 0.2 & 0.1 0.1 & 0.1 & 0.3 \end{matrix} ⎤ ⎥ ⎦ p . u

If a 3 phase fault occurs at BUS-2, the p.u. fault current in each phase is -

Q. A three-phase short-circuit fault occurs at point F. in the system shown in figure below. The fault current is _____________A.

Q. A power system has a circuit breaker connecting a large system, (initially open) to other system between bus 2 and bus 3. The system B three-phase fault level at bus 3 under the condition is unknown. After closing circuit breaker, the 3

- ϕ

fault level at bus 1 was found to be 6 pu. The new 3

- ϕ

fault level at system bus 3 after interconnection will be _______pu.(Assume prefault voltages to be 1 pu at all buses).

In the above network, the marked parameters are per unit impedances. Calculate

Y_{22}

in the bus admittance matrix

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Z-Bus Building Algorithm

POWER SYSTEMS

Watch in App

explore_more_icon

Explore more

Z-Bus Building Algorithm

Other Power Systems

Join BYJU'S Learning Program

CrossIcon