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M.E. DEGREE EXAMINATION, JANUARY 2012.
Elective
Power System Engineering
PS9261/23607/10233 PSE 21 - EHV POWER TRANSMISSION
(Regulation 2009)
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PART A— (10 × 2 = 20 marks)
1. Write the formula for power handling capacity of a signal circuit transmission line.
2. Define the term ‘Galloping’.
3. Write the two components to the flux linkage of inductance of two conductors.
4. What are the characteristics of wave propagation on the phase conductance?
5. Write the formula for geometric mean radius of the bundle conductor.
6. Write the two assumptions to make the calculations for voltage gradient on the surface of the sub-conductor.
7. Draw the audible noise frequency spectra from AC and DC transmission line.
8. List the two types of corona discharge from transmission line conductors.
9. Write the effects of electrostatic field on animals in two lines.
10. Write the usual hazards to workman experiencing shock by electromagnetic inductance.
PART B— (5 × 16 = 80 marks)
11. (a) (i) Explain the power handling capacity and line loss of AC transmission lines.
(ii) Write briefly about average values of the line parameters.
Or
(b) (i) Discuss the cost of transmission line and equipment in detail.
(ii) Write a detailed technical note on ‘Aeolian vibration’.
12. (a) List the generalized constant for EHV AC line. Explain how they are obtained for a typical EHV AC line.
Or
(b) Explain in detail about the sequence inductance and capacitance in detail.
13. (a) What is the importance of studying surface voltage gradient for designing a EHV transmission systems? Explain.
Or
(b) Develop an expression of distribution of voltage gradient on sub-conductors of bundle.
+6
14. (a) (i) Explain I2R loss and corona loss in detail.
(ii) Illustrate with the aid of noise frequency spectra, the generation of audible
noise due to Corona on EHV line.
Or
(b) (i) write day-night equivalent noise level in detail.
(ii) Discuss corona pulse generation and properties with the help of a diagram.
15. (a) Illustrate the effect of high electro static field on humans, animals and plants in
detail.
Or
(b) Write a detailed note on the following:
(i) Measurement of electrostatic field and
(ii) Electro magnetic interference.
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