ICPS

 

Important Question for GTU Exam

 1. Discuss Zbus building algorithm. Explain all types of modifications when transmission lines are added

  between the buses.

  2. Compare NR method with GS method of load flow study

  3. State the assumptions made for load flow studies and applications of load flow studies

  4. Explain tie - line load bias method of frequency control

  5. Describe the methods of voltage control adopted for large size power system in detail.

  6. Explain automatic load dispatch in power system also explain the importance of regional load dispatch

  center.

  7. The fuel cost of two unit plants are given by C1 = 100 + 2P1 + 0.005 P1 2 C2 = 200 + 2P2 + 0.01 P2 2

  where P1 and P2 in MW. The plant supplies a load of 450 MW. Find economic load scheduling of two

  unit and find incremental fuel cost, neglecting losses.

  8. Explain cascade tripping and network islanding phenomenon in brief.

  9. Explain the following. 1) Bus Incidence matrix 2) Primitive network 04 (c)  The fuel cost of two unit pl  

 10.  Describe flat frequency control and selective frequency control used for controlling frequency in power

  system

 11. Explain point by point method of stability in detail.

 12. Discuss the dynamics of synchronous machine and hence derive the swing equation.

 13. A 100 MVA, 2 pole, 60 Hz generator has a moment of inertia 50 x 10^3 kg.m3 . (a) What is energy stored in the rotor at rated speed? (b) What is the corresponding angular momentum? (c) Determine the inertia constant H. (d) If the input to the generator is suddenly increased by 25 MW, determine the rotor acceleration

 14. Describe the traditional technique and new approaches for improvement of transient stability limit of a  power system.

 15. A synchronous generator of reactance 1.2 pu is connected to an infinite bus bar (|V|=1.0 pu) through  transformer and a line of total reactance of 0.5 pu. The generator no load voltage is 1.2 pu and its inertia constant is H=5 MW– s/MV

 A. The resistance and machine damping may be assumed negligible. The system frequency is 50 Hz. Calculate the frequency of natural oscillations if the generator is loaded to (I) 60% and (ii) 75% of its maximum power limit

16.Discuss in brief the methods for improving transient stability.

 17.What is critical clearing angle? ,Explain Equal area criteria of stability.