Important questions of PSAC Unit wise

As per RGPV syllabusBy

RITU K R AP SISTec-E(EE)

UNIT 1

1. Write a note on pricing of energy and transmission services.

2. Explain the various problems associated with interconnected power system.

3. Explain the congestion in power system and also its types.4. What is Available Transfer Capacity also explain how it is calculated.5. Write down the various motivations for regulation and deregulation

of power system

UNIT 2

1. Write a purpose for conducting load flow analysis. How are the different buses in a power system classified?

2. Compare the different method of load flow studies from the view point of speed, memory requirement and convergence.

3. Explain computational procedure for load flow solution using Gauss-Siedel method. 4. Explain optimum load dispatch considering transmission losses and incremental

transmission loss, penalty factor. 5. Explain computational procedure for load flow solution using Newton-Raphson

method.

UNIT 3

1. Discuss the concept of single area and two area load frequency control. 2. Describe the load frequency control problem for single turbo generator

system supplying an isolated load. 3. Explain the concept of control area. 4. Discuss in detail the working of speed governor system in thermal power

plant. 5. Explain in brief the dynamic response of load frequency controller with

and without integral control system action.

UNIT 4

1. Explain MVAR voltage control. Also explain excitation system. 2. Explain the excitation system with the help of block diagram.3. Give general block diagram representation of voltage regulators and explain the function of each block. 4. Describe the various alternative approaches to maintain voltage profile of the transmission system.5. Differentiate between P-f and Q-V control.

UNIT 5

1. Explain equal area criterion for stability studies giving its application and limitations. 2. Compare the steady state and dynamic stability.3. A 2pole, 50Hz, 11 KV, turbo generator has a rating of 60 MW, power factor 0.85 lagging. Its rotor has moment of inertia of 8800 Kg-m2.Calculate its inertia constant in MJ/MVA and its momentum in MJ-s/electrical degree4. Explain swing equation and also derive it. What are the methods of improving transient stability?5. Explain Euler’s method in relation to power system stability.

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