11-06-2013, 12:58 PM
SEMESTER EXAMINATIONS FOR FLEXIBLE AC TRANSMISSION SYSTEMS (FACTS)
FLEXIBLE AC TRANSMISSION.pdf (Size: 22.3 KB / Downloads: 26)
Answer any five questions
All questions carry equal marks
1. a) Explain power flow in an AC transmission system.
b) What are the relative importances of controllable parameters in an AC transmission system?
2. a) Explain the concept of voltage source converter.
b) Briefly discuss the three level voltage source converter.
3. a) Describe the pulse width modulation converter with neat circuit diagram and wave forms.
b) Explain transformer connections for 24 pulse operation for voltage source converter.
4. a) What are the objectives of shunt compensation?
b) Explain how to prevent voltage instability by supporting end line voltage with shunt compensation.
5. a) Describe the hybrid VAR generator.
b) Explain the summary of compensation control with relevant block diagrams.
6. Explain the operational and performance characteristics of STATCOM and SVC.
7. a) Describe how to improve the transient stability with static series compensation.
b) Explain the GTO thyristor controlled series capacitor.
8. Write short notes on the following
a) Benefits from FACTS Controllers
b) Objectives of static series compensation.