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Name of the College : Valliammai Engineering College
University : Anna University
Department : Electrical and Electronics Engineering
Subject Code/Name : PX7301 Power Electronics For Renewable Energy Systems
Degree : M.E Power Systems
Year : II
Semester : III
Document Type : Question Bank
Website : valliammai.co.in

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Valliammai Power Electronics For Renewable Energy Systems

Part – A :

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Unit – I

1. List various renewable energy resources.
2. State the significance of renewable energy.
3. What is GHG emission?
4. List three major factors influencing the amount of GHG emissions.
5. How is a fuel cell characterized?

6. What are the types of fuel cell?
7. How biomass conversion takes place?
8. What is meant by anaerobic digestion?
9. List the advantages of anaerobic digestion.
10. List various types of bio gas plants.

11. List various factors affecting Bio digestion.
12. What is meant by spring and neap tides?
13. What is the principle of power generation using tides?
14. List the limitations of Tidal energy.
15. Mention various ocean tidal energy conversion schemes available.

16. What are the advantages of ocean wave power?
17. List various types of devices available for capturing wave power.
18. What are the problems associated with tapping solar energy?
19. What are the factors influencing solar power extraction?
20. How to use hydrogen energy to generate electric power?

Unit – II

1. What is the basic principle of wind energy conversion?
2. Why are induction generators preferred over dc generators in WECS?
3. What are the advantages of IG used in WECS?
4. Write the steady state equation of a PMSG.
5. Mention the advantages of PMSG.

6. What is principle of operation of induction generators?
7. State the difference between induction generator and synchronous generator.
8. What are the merits of squirrel cage induction generators for wind energy conversion?
9. What are the characteristics of SCIG?
10. What are the constructional differences between SCIG and DFIG?

11. State the advantages of induction generator based wind energy conversion system.
12. Bring out the merits and demerits of mains excited induction generator.
13. List the merits and demerits of capacitor excited induction generator.
14. Draw slip-torque characteristics of induction generator.
15. State the principle of PMSG.

16. What are the characteristics of DFIG?
17. State the difference between synchronous generator and PMSG.
18. What is the principle of operation of PMSG?
19. What are the merits of PMSG for WECS?
20. Draw the silp-torque characteristics of PMSG.

Unit – III

1. Draw the block diagram of solar photovoltaic system.
2. What is battery sizing?
3. Define array sizing.
4. Bring out the delicacies involved in sizing the solar arrays.
5. What are the factors to be considered for the selection of inverter and batteries for solar energy conversion?

6. What is line commutated converters?
7. What is inversion mode of operation of line commutated inverter?
8. Draw the schematic diagram of line commutated converter.
9. What is the significance of buck boost converter?
10. Draw the schematic diagram of buck boost converter.

11. List the advantages of buck boost converter.
12. Draw the schematic of boost converter.
13. What is the role of capacitor and the minimum value required for the boost converter?
14. What is three phase AC voltage controller?
15. What are the advantages of uncontrolled rectifier?

16. What are the advantages of dc link inverters?
17. What are matrix converters?
18. What is a grid interactive inverter?
19. List the limitations in the operation of matrix converter.
20. What are the merits of matrix inverters?

Unit – IV

1. What is meant by fault ride through capability?
2. What is meant by energy payback period?
3. Draw the basic block diagram of WECS.
4. Why pitch angle control is used for WECS?
5. What is stand-alone operation of fixed speed WECS?

6. What are the advantages of stand-alone operation of WECS?
7. Differentiate between fixed and variable speed wind energy conversion systems.
8. List the merits of variable speed wind energy conversion system.
9. State the advantages of fixed speed system over variable speed system.
10. What is the impact of high penetration of wind power in to power grid?

11. Draw the schematic diagram grid integrated PMSG based WECS.
12. What are the demerits of grid integrated WECS?
13. What are the power quality issues that affect wind power integration?
14. What are the major problems related with grid interconnections of WECS?
15. Draw the schematic diagram of grid integrated SCIG based WECS.

16. What are the issues created in grid integrated PMSG based WECS?
17. List out the problems in grid integrated solar system.
18. Draw the I-V characteristics of solar cell.
19. Draw the schematic diagram of grid integrated solarsystem.
20. List out the issues to be addressed while integrating the solar PV systems with grid.