Power System Operation & Control (PSOC) SPPU Endsem Question Paper May 2023
All 8 questions from this SPPU endsem paper, as printed. Read them here or open the PDF.
- Subject code
- 403141
- Pattern
- 2019 pattern
- Exam
- Endsem
- Session
- May 2023
- Max. marks
- 70
- Time
- 2.30 Hours
- Semester
- VII
- Paper code
- [6004]-503
Printed for: B.E.(Electrical Engineering)
Instructions to the candidates
- Solve Q.1 or Q.2,Q.3 or Q.4,Q.5 or Q.6 and Q.7 or Q.8.
- Figures to the right indicate full marks.
- Neat diagram must be drawn wherever neccesary.
- Assume suitable data, if necessary.
- Use of a non-programmable calculator is allowed.
Questions
Q1
ORQ2
- a)[4]
Draw the complete block diagram of single area load frequency control.
- b)[6]
Explain the necessity of automatic generation control (AGC). Also, explain the concept of area control error (ACE) of a single area and two area case.
- c)[8]
With the neat block diagram, explain two area of load frequency control.
- a)
Q3
- a)[4]
Define the terms related to the constraints of the Unit Commitment: i) Crew Constraints ii) Minimum uptime iii) Minimum downtime iv) Spinning reserve 2
- b)[5]
State the various methods for the unit commitment. Hence, explain the ‘priority list method’ for unit commitment.
- c)[8]
Explain with the mathematical formulation, the Lagrange Multiplier method of economic load dispatch with transmission loss and no constraints of generation limit while meeting the load.
Also asked:Nov 2025
OR- a)
Q4
- a)[4]
What is the need for a unit commitment study in the power system? Explain.
- b)[5]
Write a short note on: i) Heat rate curve of a thermal generating unit. ii) Cost curve of a thermal generating unit.
- c)[8]
This part has equations that don’t show as text. Open the PDF to read it.
- a)
Q5
- a)[4]
What is the need for interconnection of the power system?
- b)[4]
Explain in detail: Interchange evaluation with unit commitment.
- c)[10]
With an example explain the economic interchange between interconncted utilities. 3
OR- a)
Q6
- a)[6]
What do you mean by power pool? What is the role of the power pool in energy control?
- b)[6]
Write a short note on: Capacity Interchange, diversity interchange.
- c)[6]
- a)
Q7
- a)[4]
State the procedure to draw the QV curve. Hence, draw the QV curve with appropriate labeling showing stable-unstable regions.
- b)[6]
What are the effects of voltage instability on the power system? Explain in detail.
- c)[7]
Derive the expression of the power-voltage relationship for drawing the PV curve in detail and hence draw the PV curve with appropriate labeling showing stable-unstable region.
OR- a)
Q8
- a)[4]
What is the use of the PV curve in voltage stability analysis? State the drawbacks associated with the PV curve method.
- b)[6]
Write a short note on load characteristics in the voltage stability.
- c)[7]
What is the concept of voltage collapse in the power system? What are the causes of voltage collapse?
- a)