Q.1
14 Marks(a)
Compare AC and DC transmission in view of economy.
(b)
Write application of DC transmission.
(c)
Explain analysis of the commutating circuit.
Gujarat Technological UniversitySummer 2026 examination
GTU 3160921 HVDC Transmission Systems Summer 2026 Question Paper & PDF
B.E. · Electrical Engineering · Semester 6 · Subject code 3160921
- Total
- 70 marks
- To pass
- 23 marks (33%)
- Duration
- 2.5 Hours 10:30 AM – 1:00 PM
- Questions
- 5 with internal choice
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Q.2
14 Marks(a)
Explain:
1)Peak Inverse Voltage (PIV)
2)Peak to peak Ripple Voltage (PPR)
(b)
Determine the output DC voltage, peak to peak ripple and peak inverse voltage of 12- pulse converter given that the secondary side voltage of the converter transformer (line-to-line) is 200Kv(rms).
(c)
Give the schematic diagram of HVDC link. What are the important components?
OR
(c)
Give the schematic diagram of 12-pulse converter. What are the different conduction modes.
Q.3
14 Marks(a)
Explain operating principal of Voltage Source Converter (VSC).
(b)
Describe selective harmonics elimination technique.
(c)
Classify PWM technique and Explain sinusoidal PWM in detail.
OR
(a)
Explain the necessity of power control in HVDC link.
(b)
Compare CSC (Classical HVDC) and HVDC – VSC system.
(c)
With the help of a neat block diagram, explain the operation of constant current system and mention various requirement for the same.
Q.4
14 Marks(a)
Explain mechanism of AC power transmission.
(b)
Write a short note: Ground Electrodes
(c)
State the different firing control scheme adopted for HVDC systems with neat sketches. Explain the difference in operation of each method.
OR
(a)
Explain β control for rectifier in HVDC link.
(b)
Explain control system hierarchy for HVDC converter with diagram.
(c)
What are the characteristics and types of DC breaker. Also mention application of DC breaker.
Q.5
14 Marks(a)
How is (a) Paralleling and (b) Deparalleling in MTDC system.
(b)
Write types of MTDC (Multiterminal DC) system.
(c)
Give classification of power system stability in brief.
OR
(a)
Explain basic principle of Asynchronous link.
(b)
Explain transient stability improvement using DC link control.
(c)
Write comparison of series and parallel multiterminal HVDC system.
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About this paper
Official Gujarat Technological University (GTU) examination paper for HVDC Transmission Systems (Summer 2026, B.E. · Electrical Engineering, Sem 6). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.