Power System Operation and Control (2180909) MCQs

MCQs of Reactive Power and Voltage Control

Showing 21 to 30 out of 40 Questions
1 2 3 4
21.
Which of the following is the short term stability in a load driven system?
(a) Rotor-angle stability
(b) Short term voltage stability
(c) Frequency Stability
(d) Long-term voltage stability
Answer:

Option (b)

22.
Which of the following is the long term stability in a Load driven system?
(a) Rotor-angle stability
(b) Short term voltage stability
(c) Frequency Stability
(d) Long-term voltage stability
Answer:

Option (d)

23.
The time scale of transient voltage stability due to static VAR compensator is
(a) 1 sec
(b) 1.5 sec
(c) 0.5 sec
(d) 2 sec
Answer:

Option (a)

24.
The time scale of transient voltage stability due to OLTC operation is
(a) 1 min
(b) 2 min
(c) 3 min
(d) 2.5 min
Answer:

Option (b)

25.
The expression of critical receiving end voltage is
(a) 2Ecosδcri
(b) Ecosδcri
(c) E2cosδcri
(d) 1-Ecosδcri
Answer:

Option (c)

26.
The expression for critical power angle is
(a) π4-θ2
(b) π4+θ2
(c) π4+θ4
(d) None of above
Answer:

Option (a)

27.
Which of the following methods is/are used for reactive or voltage compensation
(a) Shunt capacitor
(b) Series capacitor
(c) Generation excitation control
(d) All of the above
Answer:

Option (d)

28.
The operation of OLTC does
(a) Improve voltage stability
(b) Not improve voltage stability
(c) Not comment on voltage stability
(d) Improve power factor
Answer:

Option (b)

29.
The operation of OLTC improve voltage stability if
(a) The reactive power status at load bus improves
(b) The active power status at load bus improves
(c) The active power status at load bus reduces
(d) None of above
Answer:

Option (a)

30.
Line compensation improve power system operation by
(a) Keeping voltage closer to nominal value
(b) Reduces line current and losses
(c) Enhance stability
(d) All of above
Answer:

Option (d)

Showing 21 to 30 out of 40 Questions
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