EHV AC/DC Transmission 2018 Question Paper — Government College of En…
The 2018 EHV AC/DC Transmission previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.
- University: Government College of Engineering and Technology, Jammu
- Subject: EHV AC/DC Transmission
- Course: EHV AC/DC Transmission
- Branch: Electrical Engineering
- Year: 2018
- Paper: end-term
- Duration: 180 minutes
- Total marks: 100
Instructions
- Attempt five questions in all selecting at least two questions from each Section.
- Each question carries 20 marks.
- Use of calculator is allowed.
Questions
Section - A
- QQ1. Explain the calculation related to potential gradient for conductor's arrangement in case of 3-phase transmission lines? Also discuss the various factors affecting corona? [20 marks]
- QQ2. Discuss the disruptive critical voltage for single phase and 3-phase transmission lines. Also explain the visual critical voltage and power loss due to corona? [20 marks]
- QQ3. Why is the radio interference aspect important in the design of EHV systems? How can radio interference be estimated and controlled in case of transmission lines? Also explain why EHV lines are necessary to transmit large block of power over long distances? [20 marks]
- QQ4. Explain the major limitations in the transmission of power by a 3-phase EHV-AC system? [20 marks]
Section - B
- QQ5. Briefly discuss the starting and stopping of dc link in case of HVDC transmission lines? [20 marks]
- QQ6. Explain the firing angle control and the various firing angle schemes in detail in case of HVDC valves? [20 marks]
- QQ7. Explain the voltage source converters in case of HVDC transmission? Also briefly describe the graetz bridge circuit? [20 marks]
- QQ8. Write short note on: (a) Advantages of HVDC transmission (b) Limitation of HVDC transmission (c) Filters used in HVDC transmission lines [20 marks]