Series and Shunt Compensation | Power Systems | Electrical Engineering | EEE | GATE Syllabus, Paper Solution, Question Answer

Weightage of Series and Shunt Compensation

Total 2 Questions have been asked from Series and Shunt Compensation topic of Power Systems subject in previous GATE papers. Average marks 1.50.

Question No. 39

GATE - 2017
02

A load is supplied by a 230 V, 50 Hz. The active power P and the reactive power Q consumed by the load such that $1 k W \leq P \leq 2 k W$ and $1 k V A R \leq Q \leq 2 k V A R$ . A capacitor connected across the load for power factor correction generates 1 kVAR reactive power. The worst case power factor after power correction is

(A) 0.447 lag
(B) 0.707 lag
(C) 0.894 lag
(D) 1

Show Answer

(B) 0.707 lag

Subject : Power Systems

Topic : Series and Shunt Compensation

Question No. 125

GATE - 2016
01

The inductance and capacitance of a 400 kV, three-phase, 50 Hz lossless transmission line are 1.6 mH/km/phase and 10 nF/km/phase respectively. The sending end voltage is maintained at 400 kV.To maintain a voltage of 400 kV at the receiving end, when the line is delivering 300 MW load, the shunt compensation required is

(A) capacitive
(B) inductive
(C) resistive
(D) zero

Show Answer

(B) inductive

Subject : Power Systems

Topic : Series and Shunt Compensation

Explanation :

$ \begin{array}{l}\;{\mathrm Z}_\mathrm n=\sqrt{\frac{\mathrm L}{\mathrm C}}=\sqrt{\frac{1.6\times10^{-3}}{10\times10^{-9}}=400\mathrm\Omega}\\\mathrm{SIL}=\frac{400\times400}{400}=400\;\mathrm{MW}\end{array} $

In the second case SIL decreases means Z_n increases.

Z_n increases with in inductance 'L'.

So, it is inductive

Load < SIL means, line behaves capacitive to compensate it inductor to be placed.

Questions & Answers of Series and Shunt Compensation

Weightage of Series and Shunt Compensation

Show Answer

(B) 0.707 lag

Show Answer

(B) inductive

Topics of Power Systems

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