Advanced Power Electronics (3170906) MCQs

MCQs of  FACTS devices

Showing 21 to 30 out of 39 Questions
21.

Which of the following is 3rd generation FACTs device?

(a)

UPFC

(b)

STATCOM

(c)

SSSC

(d)

SVC

Answer:

Option (a)

22.

____________________ is a combination of two or more independently controllable static synchronous series compensator (SSSC) which are solid state voltage source converters which inject an almost sinusoidalvoltage at variable magnitude and couples via a common DC link.

(a)

UPFC

(b)

SVC

(c)

STATCOM

(d)

IPFC

Answer:

Option (d)

23.

___________________ is needed to establish the magnetic and electrostatic fields; it is temporarily stored and then released 

(a)

Active Power

(b)

Reactive Power

(c)

Instantaneous Power

(d)

Apparent Power

Answer:

Option (b)

24.

In fact the energy associated with the __________________  oscillates between the element and the rest of the circuit.

(a)

reactive power

(b)

active power

(c)

instantaneous power

(d)

apparent power

Answer:

Option (a)

25.

Normally, the reactive power has _____________ average value

(a)

High

(b)

Low

(c)

zero

(d)

negative

Answer:

Option (c)

26.

When Q is positive the current _______________ the voltage

(a)

lags

(b)

leads

(c)

inphase

(d)

out of phase

Answer:

Option (a)

27.

when Q is negative the voltage ________ the current.

(a)

lags

(b)

leads

(c)

inphase

(d)

out of phase

Answer:

Option (a)

28.

If the supply has frequency f Hz then what would be the frequency of intantaneous power?

(a)

f

(b)

2 x f

(c)

f / 2

(d)

f x f

Answer:

Option (b)

29.

We can control the P and/or Q transfers in the transmission line varying

(a)

sending end voltage

(b)

receiving end voltage

(c)

load angle

(d)

all of these

Answer:

Option (d)

30.

In TCR if the firing angle is changed from 90° to 180° the harmonics in ITCR __________________

(a)

increases

(b)

decreases

(c)

becomes zero

(d)

remains unchanged

Answer:

Option (a)

Showing 21 to 30 out of 39 Questions