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EndsemMay 20232019 patternBE Electrical

EHV AC Transmission SPPU Endsem Question Paper May 2023

All 8 questions from this SPPU endsem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated EHV AC Transmission questions
Subject code
403151A
Pattern
2019 pattern
Exam
Endsem
Session
May 2023
Max. marks
70
Time
2½ Hours
Semester
VIII
Paper code
[6004]-520

Printed for: B.E. (Electrical Engineering)

Instructions to the candidates

  1. Answer all questions.
  2. Attempt Q.1 or Q.2, Q.3 or Q.4, Q.5 or Q.6 and Q.7 or Q.8.
  3. Neat diagrams must be drawn wherever necessary.
  4. Figures to the right indicate full marks.
  5. Assume Suitable data if necessary.
  6. Use of calculator is allowed.

Questions

  1. Q1

    1. a)

      Explain Electrostatic Field of a point charge and its properties.

      [9]
    2. b)

      Explain Field of line charges and their properties & charge potential relations for multi-conductor lines.

      [9]

  2. Q2

    1. a)

      Explain design of cylindrical cage for corona gradients.

      [9]
    2. b)

      Explain Electric shock and threshold currents

      [9]

  3. Q3

    1. a)

      Evaluate the horizontal, vertical and total value of electrostatic field components near the single circuit transmission line, which are energized by three phase voltages.

      Also asked:Nov 2023

      [9]
    2. b)

      Derive expression for electrostatic induction on un energized circuit of double circuit line.

      Also asked:Nov 2023

      [8]

  4. Q4

    1. a)

      Derive the expression for magnetic field calculation of horizontal configuration of Single circuit of three phase lines.

      Also asked:Nov 2023

      [9]
    2. b)

      Discuss effect of high electrostatic field on : i) Humans ii) Animals iii) Plants

      Also asked:Nov 2023

      [8]

  5. Q5

    1. a)

      Explain the corona formation and methods to reduce the corona effects.

      Also asked:Nov 2023

      [8]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [9]

  6. Q6

    1. a)

      With the help of simple block diagram. explain the audible noise measuring circuit in EHV AC lines.

      Also asked:Nov 2023

      [8]
    2. b)

      State and explain at least 4 formulae for power loss due to corona.

      Also asked:Nov 2023

      [9]

  7. Q7

    1. a)

      Write note on various properties of XLPE used in EHV cables.

      Also asked:Nov 2023

      [9]
    2. b)

      Name the materials used for insulation in E.H.V cables; and state the properties of SF6 gas as an insulating in cables.

      Also asked:Nov 2023

      [9]

  8. Q8

    1. a)

      State and Explain at least four factors to be considered in the design of EHV lines based upon the steady state limits. Also state their limiting value.

      Also asked:Nov 2023

      [9]
    2. b)

      Define tan  loss factor and derive an expression for insulation resistance of a cable. 

      Also asked:Nov 2023

      [9]