JNTU Kakinada B-Tech 4-1 POWER SYSTEM OPERATION AND CONTROL R13 March 2018 Question Paper

IV B.Tech I Semester Supplementary Examinations, February/March – 2018
POWER SYSTEM OPERATION AND CONTROL (Electrical and Electronics Engineering)Time: 3 hours Max. Marks: 70
Question paper consists of Part-A and Part-B
Answer ALL sub questions from Part-A
Answer any THREE questions from Part-B
*****

PART ?A (22 Marks)1. a) Draw heat curve and explain its significance. [3]
b) Define methods for solving hydro thermal scheduling. [3]
c) Write the constraints in the formulation of unit commitment problem. [4]
d) Explain the principle of tie line bias control. [4]
e) Discuss the merits of proportional plus integral load frequency control. [4]
f) Write the advantages and disadvantages of compensation in transmission system. [4]

PART ?B (3×16 = 48 Marks)2. a) Explain the following terms with reference to power plants heat input ? power
output curve, heat rate input, incremental input, generation cost and production
cost.

[8]
b) Draw the flow chart for obtaining optimal scheduling of generating units by
neglecting the transmission losses.
[8]

3. a) Explain problem formation and solution procedure of optimal scheduling for
hydro thermal plants.
[8]
b) Explain about hydro ? thermal co-ordination with necessary equations. [8]

4. a) Explain the need of an Optimal unit commitment problem. [8]
b) With the help of a flow chart, explain the dynamic programming method in unit
commitment.
[8]

5. a) How is speed governor mechanism modeled and Explain its operations with the
speed load characteristics.
[8]
b) Draw the block diagram of uncontrolled two area load frequency control system
and explain the salient features under static condition
[8]

6. a) Explain proportional plus integral load frequency control of a single area system
with a neat block diagram.
[8]
b) Discuss the importance of combined load frequency control and economic
dispatch control with a neat block diagram.
[8]

7. a) What do mean by compensation of a line? Discuss briefly different methods of
compensation.
[8]
b) Define fundamentals of FACTS devices and Write the need for FACTS
controllers.
[8]
Code No: RT41023
Set No. 1
R13
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