Which of the following is the best method for determining the stability and transient response?

Consider the following statements 1. Value of transient stability limit will be lower than steady-state stability limit 2. Transient stability limit is the maximum flow of power through a particular point in the power system without loss of stability when large and sudden disturbances occur 3. Critical clearing angle is related to the steady-state stability limit Which of the above statement(s) is/are correct?

A

Only 1

B

All

C

Only 1 and 2

D

Only 1 and 3

Consider the following statements with reference to the response of a control system: 1. A large resonant peak corresponds to a small overshoot in transient response. 2. A large bandwidth corresponds to slow response. 3. The cut-off rate indicates the ability of the system to distinguish the signal from noise 4. Resonant frequency is indicative of the speed of transient response. Which of the above statements are correct?

A

1 and 2

B

2 and 3

C

1 and 4

D

3 and 4

Assertion (A): All the systems which exhibit overshoot in transient response will also exhibit resonance peak in frequency response. Reason (R): Large resonance peak in frequency response corresponds to a large overshoot in transient response.

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true and R is not the correct explanation of A

C

A is true but R is false

D

A is false but R is true

In a power system, which of the following is/are critical clearance time of a fault related to? 1. Transient reactance 2. Sub-transient reactance 3. Reactive power limit 4. Transient stability limit

A

1 and 2

B

2 only