Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (EEE)- Electrical And Electronics Engineering 2020 December 3rd Sem 72165 Power System I (Transmission And Distribution) Previous Question Paper
Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (EE) PT (Sem.?3)
POWER SYSTEM ? I (TRANSMISSION & DISTRIBUTION)
Subject Code : BTEE-405
M.Code : 72165
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks each and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Write briefly :
1.
What are the limitations of Kelvin's law?
2.
What is meant by power supply system?
3.
Define Feeder, Distributor and Service Mains.
4.
What is purpose of insulator?
5.
Define Surge Impedance Loading.
6.
What is series compensation?
7.
What is a ring distributor?
8.
Write an expression for inductance of a single phase transmission system.
9.
Define - Self and mutual - G.M.D.
10. Why all overhead lines use ACSR conductors?
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SECTION-B
11. Explain the classification of lines based on their length of transmission.
12. Explain Kelvin's Economy Law and derive the condition for most economical cross-
sectional area of the conductor.
13. Draw and explain the layout of a power system network from generation to distribution
showing all the voltage levels at various intermediate stages.
14. Explain in brief various types of conductors with one advantage of each type.
15. Explain shunt compensation with necessary diagram.
SECTION-C
16. A 3-phase 132 kV, 100 Km, 50 Hz, single circuit line has horizontal spacing with 3.5 m
between adjacent conductors. The conductor's diameter is 1.2cm. Find the line
capacitance per phase and the charging current per phase :
a) Without effect of earth
b) With effect of earth.
17. Derive A, B, C and D parameters for Nominal model of a medium line and draw its
phasor diagram?
18. A three phase 5 km long transmission line, having resistance of 0.5 / km and
inductance of 1.76mH/km is delivering power at 0.8 pf lagging. The receiving end
voltage is 32kV. If the supply end voltage is 33 kV, 50 Hz, find line current, regulation
and efficiency of the transmission line?
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 13 February 2021