Q.1
14 Marks(a)
List out the Components of a HVDC system.
(b)
What are the Limitations of HVDC Transmission lines?
(c)
Explain twelve pulse converters.
Gujarat Technological UniversitySummer 2025 examination
GTU 3160921 HVDC Transmission Systems Summer 2025 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 characteristics of harmonics.
(b)
What will happen, when a line commutated converter operates in inverter mode?
(c)
Analyze the effect of delaying the firing angle.
OR
(c)
Explain effects of firing angle delay in line commutated converters.
Q.3
14 Marks(a)
What do you mean by Rectifier and Inverter operation?
(b)
Write short note on “corona effect”.
(c)
Write short note on high level controllers.
OR
(a)
What is commutation process in HVDC system?
(b)
Write short note on DC breaker.
(c)
Explain mono-polar operation of HVDC.
Q.4
14 Marks(a)
Write down a Principle of Power modulation.
(b)
Explain “Phase-Locked Loop”
(c)
What is selective harmonic elimination technic? How to eliminate selective harmonics?
OR
(a)
List out the Types of Multi-terminal HVDC System.
(b)
Classify PWM techniques.
(c)
Explain rotating reference frame theory.
Q.5
14 Marks(a)
Explain basic principles of synchronous and asynchronous links.
(b)
Explain DC line faults in VSC systems.
(c)
Write a short note on “Modern Trends in HVDC Technology.”
OR
(a)
Explain DC line faults in LCC systems.
(b)
Explain modular multi-level converters.
(c)
Discuss Voltage Stability Problem in AC/DC systems.
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About this paper
Official Gujarat Technological University (GTU) examination paper for HVDC Transmission Systems (Summer 2025, 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.