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InsemMar 20252019 patternTE Electrical

Power System Engineering-II SPPU Insem Question Paper Mar 2025

All 4 questions from this SPPU insem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated Power System Engineering-II questions
Subject code
303148
Pattern
2019 pattern
Exam
Insem
Session
Mar 2025
Max. marks
30
Time
1 Hour
Semester
II
Paper code
[6410]-429

Printed for: T.E. (Electrical)

Instructions to the candidates

  1. Solve Q1 or Q2, Q3 or Q4.
  2. Use of calculator are allowed.
  3. Figures to the right indicates full marks.
  4. Assume suitable data, if necessary.

Questions

  1. Q1

    1. a)

      Derive the equation for active and reactive power transfer to receiving end when generalized ABCD constant of a transmission line is known.

      [7]
    2. b)

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

      [2]

  2. Q2

    1. a)

      Derive the equation for ABCD parameters for long transmission line.

      Also asked:Feb 2023

      [7]
    2. b)

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

      [3]

  3. Q3

    1. a)

      i) List the factor affecting corona loss. ii) Derive the equation for critical disruptive voltage of corona. [5]

      [2]
    2. b)

      The average values of line parameters for 750kV and 1200kV transmission lines are as given below. The length of the line is 500km. System voltage (kV) 750 1200 r(  /phase/km) 0.0136 0.0027 x(  /phase/km) 0.272 0.231 Determine for each case : i) Maximum power transfer. ii) Power transfer capability, if phase angle of 30º is maintained between sending and receiving end voltage. [3] iii) Power transfer capability, if parallel transmission line is added maintaining phase angle difference of 30º. [2]

      [3]

  4. Q4

    1. a)

      i) List the classification of transmission line according to voltage levels. ii) Elaborate any five advantages of EHVAC transmission line in details. [5]

      [2]
    2. b)

      A three phase transmission line has conductor radius of 0.50 cm and are spaced 3m in an equilateral arrangement. The air temperature is 26º Celsius and pressure is 74cm of Hg. Surface factor is 0.85. Take breakdown strength of air 30kV/cm (peak). Determine the i) Disruptive critical voltage in kV/ph. ii) Local visual critical voltage in kV/ph. Irregularity factor for local visual corona is 0.72. [2] iii) Visual critical voltage in kV/ph for general corona. Irregularity factor for general visual corona is 0.82. [2] 

      Also asked:Feb 2023

      [4]