ANNA UNIVERSITY COIMBATORE
B.E./B.Tech. DEGREE EXAMINATION:MAY/JUNE 2010
	REGULATION-2007
	(FOURTH SEMESTER TO EEE)
GENERATION TRANSMISSION AND DISTRIBUTION

Time : 3 hours            Maximum : 100 marks
	PART A — (20 * 2 = 40 marks)
1. Why all transmission and distribution system are 3 phase system?
2. Mention the transmission voltage that are used in india
3. what are service main
4. State the advantage and disadvantage os system of steam power station
5. What is skin effect?
6. What is meant by transposition of line conductor?
7. What is a bundle conductor?Mention the advantage of using bundled conductor
8. Define proximity effect
9. What are the unit of ABCD constant of a transmission line?
10.Mention the limition of nominal T and pi method in the line problems
11.What is the power circle diagram?
12.What is the reason for sagin the transmission line
13.List the four parameter by which the performance of transmission line are governed
14.What is meant by  charing current of a cable?
15.What is surge impedance loading?
16.Why the working voltage level of belted cables is limited to 22KV?
17.Why powerloss occurs in the dielectric of a cable
18.Mention the demerit of HVDC transmission  
19.What are advantage of SL cable over H-type cable?
20.What are the advantage of adopting EHV/UHV for transmission of ac electric power?
		
		PART B — (5 * 12 = 60 marks)
21.(a)Draw and explain the structure of modern electric power with various voltage levels
   (b)What do youmean by interconnection power stations?What are the advantage of interconnected system
22.Draw and explain the schematic arrangement of steam power station
23.(a)Drive an expression for loop innnductance of a single phase overhead transmission line
   (b)calculate the loop inductance per km of a single phase transmission line consisting of two parallel condutors
      1.5m apart and 1.5cm in diameter.calculate also the reactance of the transmission line if its operating frequency is 50Hz
24.Show how regulation and transmission efficiency are determined for medium lines using
    (i) nomina T method
    (ii)nominal pi method
25.Using rigorous mrthod,derive expression for sending end voltage and current for a long transmission line
26.Elaborate various method to improve the string efficieny
27.Discuss and compare radial and ring main distribution system.what is the role of interconnectors in distribution system?
28.Write short notes on the followinf FACTS devices STATCOM,SVC,TSCS,UPFC.