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GATE 2023 Power systems Champion Quiz 9

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Question 1

Consider the following statements regarding smoothing reactor in HVDC transmission.
A) It increases the harmonic voltages and currents in the DC line.
B) Commutation failures in inverters are prevented by smoothing reactors.
C) The stresses on converter valve and surge diverter are reduced.
Which of the following option is correct?

Question 2

Two regional systems, each having several synchronous generators and loads are interconnected by an ac line and HVDC link as shown in the figure. Which of the following statements is true in the steady state:

Question 3

The HVDC system uses which of the following converters at sending and receiving end?

Question 4

A 550 kV underground cable is having a core and the relative permittivity of dielectric medium is 6 and offered capacitance of cable is 5μf/km. The dielectric power loss in this HVDC cable is ____________W.

Consider length of cable is 8 km.

Question 5

Which of the following HVDC link has more than one conductor and the polarity of all the conductors is similar?

Question 6

A power is transmitted through HVDC line of resistance of 10 Ω. If sending end voltage is 240V and receiving end voltage is 200 V. Then the power transmission will be:

Question 7

Which one of the following is used for communication with the aim of achieving high figure of merit of HVDC circuit breakers?

Question 8

Consider the following statements:
The suitable configuration of HVDC converter is decided on the requirements
1) of high pulse number
2) of converter transformer utilization factor should be near to unity.
Which of these statements is/are correct?
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Oct 15ESE & GATE EE