As per RGPV Syllabus here is a unit wise collection of important questions.

1. Important questions of PSAC
Unit wise
As per RGPV syllabus
By
RITU K R
AP SISTec-E(EE)

2. 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

3. 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.


4. 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.

5. 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.

6. 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 degree
4. 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.

7. THANK YOU
.