EE 3004 HVDC AND FACTS QUESTION BANK
UNIT 1 AND 2
Part A
Unit 1
1.List out the factors to be considered for DC transmission systems. (nov,dec 2021)
2.What are the objectives of series compensation? (nov,dec 2021)
3.What is the need for HVDC Transmission? (apr,may
2015)
4.What is the function of smoothing reactor? (apr,may 2015)
5.Write the expression for converter valve utilization factor. (apr,may 2015)
6.Give the assumptions made for the fast steady-state solution of the HVDC converter equation.
(apr,may 2015)
7. Distinguish between AC and DC Transmission systems. (nov,dec 2012)
8.Mention any three applications of DC transmission systems. (nov,dec 2012)
9.Mention the applications of high voltage de transmission systems. (apr 2014)
10. . Mention the different types of DC links .(apr,may
2011)
Unit 2
1.State the characteristic differences between TSSC and TCSC. (nov,dec
2021)
2.Draw the output voltage Vs firing angle characteristic of a three phase rectifier .(nov,dec 2012)
3.What is the use of tap changing transformers in HVDC systems? (nov,dec 2012)
4.Show graphically the selection of optimum system voltage to minimize the sum of converter
and line cost. (apr,may
2011)
Part B
Unit 1
1.Explain the advantages and disadvantages of HVDC transmission over AC transmission
system. (nov,dec
2021)
2. Explain the different types of HVDC transmission system and modern trends in HVDC
transmission systems .(nov,dec
2021)
3. Compare AC and DC transmission system based on economic, technical performance
aspects and reliability. (apr,may 2015)
4.List out some of the modern trends in DC transmission (apr,may 2015)
5.List out various applications of HVDC transmission system (apr,may 2015)
6.With neat schematic diagrams discuss the DC transmission system in detail. (nov,dec 2012)
7.Discuss the modern trends in DC transmission. Also describe the steps involved in planning
the HVDC transmission system. (nov,dec 2012)
8.Compare AC and DC transmission based on their technical performance. (apr 2014)
9. Explain the different types of DC links with neat sketches and state the disadvantages of DC
transmission. (apr,may
2011)
10.Explain in detail the modern trends in DC transmission and the applications of DC
transmission in detail. (apr,may 2011)
11.Explain the technological development in control and protection, for better performance and
reliability of D.C. transmission systems. (apr,may 2007)
Unit 2
1.Draw the VI characteristics of SVC(FC+TCR) and power system and explain how the SVC is
able to regulate the HVAC bus voltage. (nov,dec
2021)
2.From the fundamentals derive the expressions for steady state thyristor current when the
TCSC is operating in the vernier mode. (nov,dec
2021)
3.Draw the schematic diagram of a typical HVDC converter station and explain the functions of
various components available. (apr,may 2015)
4.Explain certain modern trends followed in high voltage de transmission system at the power
electronic device level. (apr 2014)
5.For a fixed power of transmission, explain how the economic choice of voltage level is
selected in D.C. transmission system. (apr,may 2007)
