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EX-601 · Power System‑II/Unsolved PYQ Paper

EX-601 Power System - II - Dec 2024 Question Paper

  1. 7 Marks
    aWhy the interconnected power system is necessary? Explain the problems associated with them.
  2. 7 Marks
    bWhat is deregulation in the power system? Explain its effect and how it can be overcome?
  3. 7 Marks
    aCompare different types of power flow studies used in the power system analysis.
  4. 7 Marks
    bExplain Gauss-Seidel method of power flow analysis.
  5. 7 Marks
    aExplain why it is necessary to keep strict limits on the system frequency variations.
  6. 7 Marks
    bA 100 MVA 50 Hz turbo alternator operates at no load at 3000 rpm. A load of 25 MW is suddenly applied to the machine and the steam valves to the turbine commence to open after 0.6 secs due to the time lag in the governor sysetm. Assuming inertia constant H of 4.5 kW-sec per KVA of generator capacity, calculate the frequency to which the generated voltage drops before the steam flow commences to increase to meet the new load.
  7. 14 Marks
    Discuss in detail about the generation and absorption of reactive power in power system components.
  8. 7 Marks
    aState and derive the swing equation.
  9. 7 Marks
    bA large generator is delivering 1.0 p.u. power to an initiate bus through a transmission network. The maximum power which can be transferred for pre-fault, during fault and post fault conditions are 1.8 p.u., 0.4 p.u. and 1.3 p.u. respectively find the critical clearing angle.
  10. 7 Marks
    aDiscuss the various methods of improving steady-state stability in power system.
  11. 7 Marks
    bA 50 Hz, 4 pole turbo alternator rated 100 MVA, 11 kV has an inertia constant of 8 MJ/MVA. Find
  12. 7 Marks
    aExplain with the help of a block diagram the automatic voltage regulator of turbo generators.
  13. 7 Marks
    bWhat is the need of the excitation system? Explain A.C. static excitation system.
  14. 14 Marks
    Write short notes (any two)
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