Advanced Power Electronics (3170906) MCQs

MCQs of HVDC Transmission

Showing 11 to 20 out of 25 Questions
1 2 3
11.

Which of the following uses earth or sea for the return path of the current?

(a)

Bipolar Link
(b)

Monopolar Link
(c)

Homopolar Link
(d)

Back to back
Answer:

Option (b)

12.

When continuous ground currents are inevitable then ____________ system is preferable.

(a)

Monopolar
(b)

Homopolar
(c)

Bipolar
(d)

Back to back
Answer:

Option (b)

13.

Negative polarity on the line in HVDC scheme helps to reduce 

(a)

Power Factor
(b)

Reactive Power
(c)

Line Reactance
(d)

Corona loss
Answer:

Option (d)

14.

Do we need communication channel in the Monopolar HVDC scheme?

(a)

Yes
(b)

No
(c)

Maybe
Answer:

Option (a)

15.

To get the high current capability in the current the valves used in construction of the converter are connected in 

(a)

Series
(b)

Parallel
(c)

Series-parallel combination
(d)

Star or Delta manner
Answer:

Option (b)

16.

Which is the lowest order harmonic present in the source current of 12 pulse converter?

(a)

5th order
(b)

7th order
(c)

11th order
(d)

13th order
Answer:

Option (c)

17.

At normal operation, a converter consumes the reactive power in an amount that corresponds to ___________ of transmitted active power.

(a)

Approximately 20%
(b)

Approximately 40%
(c)

Approximately 50%
(d)

Approximately 60%
Answer:

Option (c)

18.

If only 11th order harmonic is required to be eliminated then which of the following filter is preferred?

(a)

Tuned Filter
(b)

Damped Filter
Answer:

Option (a)

19.

The main objective of the smoothing reactor

(a)

To reduce the risk of commutation failure
(b)

Prevent the resonance in the DC circuit
(c)

To smooth the ripple current in DC
(d)

All of these
Answer:

Option (d)

20.

Which of the following section is more costly to setup HVDC link?

(a)

Converter Transformer
(b)

Civil Works Buildings
(c)

Valves
(d)

Engineering
Answer:

Option (c)

Showing 11 to 20 out of 25 Questions
1 2 3