TRANSMISSION AND DISTRIBUTION EE2303 ANNA UNIVERSITY NOVEMBER/DECEMBER 2010 QUESTION PAPER


B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010 
Fifth Semester 
Electrical and Electronics Engineering 
EE 2303 — TRANSMISSION AND DISTRIBUTION 
(Regulation 2008) 
Time : Three hours Maximum : 100 Marks
Answer ALL questions 
PART A — (10 × 2 = 20 Marks)
1. State the disadvantages of HVDC transmission. 
2. Which factors affect sag in the transmission line? 
3. Define skin effect. 
4. What are the advantages of using bundled conductors? 
5. What is Ferranti effect? 
6. What is shunt compensation? 
7. Define string efficiency. 
8. What is the necessity of grading of an under ground cable? 
9. List the various substation equipments. 
10. Why are transmission lines 3 phase 3 wire circuits while distribution  lines are  3 phase 4 wire circuits? 
PART B — (5 × 16 = 80 Marks)
11. (a) Discuss in detail the various equipments used in HVDC converter  station. 
Or 
(b) An overhead line has a span of 336 m. The line is supported ,at a water  Crossing from two towers whose heights are 33.6 m and 29 m above  water level. The weight of conductor is 8.33 N/m and tension in the  conductor is not to exceed 3.34 × 104 N.
Find (i) Clearance between the  lowest point on the conductor and water
(ii) horizontal distance of this  point from the lower support. 
12. (a) Derive the expression for inductance of a three phase line with  unsymmetrical Spacing. 
Or 
(b) A 220 KV, 50 Hz, 200 Km long three phase line has its conductors on the 
corners of a triangle with sides 6 m, 6m and 12 m. The conductor radius 
is 1.81 cm. Find the capacitance per phase per km, capacitive reactance 
per phase, charging current and total charging Mega volt-amperes. 
13. (a) What is a nominal ? (pi) circuit? Find the ABCD constants for 
nominal  ? Circuit. 
Or 
(b) Write short notes on : 
(i) Shunt compensation. [Marks 8] 
(ii) Series compensation. [Marks 8] 
14. (a) Discuss briefly on the following : 
(i) Pin Type insulator. [Marks 8] 
(ii) Suspension Type insulator. [Marks 8] 
Or 
(b) Derive the expression for the Insulation resistance, capacitance,  Electric  stress and dielectric loss of a single core cable. 
15. (a) Explain briefly the various types of bus bar arrangements in a  substation. 
Or 
(b) Discuss briefly each of the following : 
(i) Feeders. [Marks 4] 
(ii) Radial distribution. [Marks 6] 
(iii) Ring main distribution. [Marks 6] 

TRANSMISSION AND DISTRIBUTION EE2303 ANNA UNIVERSITY NOVEMBER/DECEMBER 2010 QUESTION PAPER Reviewed by Rejin Paul on 6:47 AM Rating: 5

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