Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech EEE (Electrical And Electronics Engineering) 2020 March 7th and 8th Sem High Voltage Direct Current Transmission Previous Question Paper
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(Electrical & Electronics Engg.) (2013 & Onwards E-II)
(Sem.?7)
HIGH VOLTAGE DIRECT CURRENT TRANSMISSION
Subject Code : BTEEE-804B
M.Code : 71964
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.
SECTION-A
1. Write briefly :
a. What do you mean by monopolar link in HVDC system?
b. Write any two limitations of HVDC system.
c. Write one semiconductor switching device used for line frequency and high power
application.
d. What are the advantages of high voltage AC transmission?
e. Why HVDC line do not require any reactive power compensation?
f. Why dc transmission is economical and preferable over ac transmission for large
distances only?
g. Why Corona loss is lesser in DC than in AC line?
h. ?Power loss in AC line is more compared to DC line?. Explain
i. What are the factors to be considered for planning of HVDC transmission?
j. Explain the major components of a HVDC transmission in converter station unit.
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1 | M-71964 (S2)-928
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(Electrical & Electronics Engg.) (2013 & Onwards E-II)
(Sem.?7)
HIGH VOLTAGE DIRECT CURRENT TRANSMISSION
Subject Code : BTEEE-804B
M.Code : 71964
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.
SECTION-A
1. Write briefly :
a. What do you mean by monopolar link in HVDC system?
b. Write any two limitations of HVDC system.
c. Write one semiconductor switching device used for line frequency and high power
application.
d. What are the advantages of high voltage AC transmission?
e. Why HVDC line do not require any reactive power compensation?
f. Why dc transmission is economical and preferable over ac transmission for large
distances only?
g. Why Corona loss is lesser in DC than in AC line?
h. ?Power loss in AC line is more compared to DC line?. Explain
i. What are the factors to be considered for planning of HVDC transmission?
j. Explain the major components of a HVDC transmission in converter station unit.
2 | M-71964 (S2)-928
SECTION-B
2. Explain the use of surge arresters in transmission lines.
3. Explain the proximity effect in case of AC transmission lines.
4. Explain the working of a three phase six pulse converter with a resistive load.
5. Compare HVDC and HVAC transmission system.
6. How the current and extinction angle is controlled in a Converter?
SECTION-C
7. ?A 12 pulse converter has better rectification efficiency than a three phase six pulse
converter?. Justify the statement with suitable circuit diagram and waveform.
8. Explain the reason of using smoothing reactors in HVDC system. Give suitable circuit
diagram and mathematical expressions to justify that the harmonics are reduced in the
DC circuit by the reactor.
9. What are the different possible faults in HVDC transmission systems? Explain any one
technique to protect the high power converters from over currents.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 21 March 2020