Q.1
14 Marks(a)
Describe the advantages of interconnections of power systems in details.
(b)
What is Power system Islanding? Discuss the effect of Islanding.
(c)
Explain methods used for voltage control in power systems.
Gujarat Technological UniversitySummer 2026 examination
GTU 2170901 Interconnected Power System Summer 2026 Question Paper & PDF
B.E. · Electrical Engineering · Semester 7 · Subject code 2170901
- Total
- 70 marks
- To pass
- 23 marks (33%)
- Duration
- 2.5 Hours 2:30 PM – 5:00 PM
- Questions
- 5 with internal choice
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Q.2
14 Marks(a)
Define terms : (a) Graph (b) tree (c) co-tree
(b)
Explain power system restoration after cascade tripping.
(c)
Discuss ZBUS building algorithm. Explain all types of modifications when transmission lines are added between buses.
OR
(c)
A three Bus, three line systems is shown in Figure-1, each line has as series impedance of (0.05+j0.15) p.u., and the shunt admittance is neglected. Find YBUS. Figure-1
Q.3
14 Marks(a)
State the assumptions made for load flow studies.
(b)
By using Gauss-Seidel method determine the voltages V1 and V2 of following set of linear equations: 10V1+2V2 = 10 ; 4V1+7V2 = 15
(c)
Compare Newton-Raphson method with Gauss-Seidal method.
OR
(a)
Derive static load flow equations.
(b)
What is the importance of slack bus in power system?
(c)
Give the algorithm with flow chart for a fast decoupled load flow solution.
Q.4
14 Marks(a)
Define penalty factor.
(b)
Define power system stability and give its classification.
(c)
Write short note on unit commitment.
OR
(a)
Draw Heat rate curve and Incremental rate curve with appropriate notation.
(b)
List out methods to improve transient stability of the power system.
(c)
Determine transmission loss formula using Kron’s method.
Q.5
14 Marks(a)
Discuss the factors affecting steady transient stability.
(b)
Discuss transient stability conditions using equal area criteria.
(c)
A 100 MVA, 2 pole, 60 Hz generator has a moment of inertia 50×103 Kg.m3
1)What is energy stored in the rotor at rated speed?
2)What is corresponding angular momentum?
3)Determine the inertia H.
4)If the input to generator is suddenly increased by 25 MW, determine the rotor
acceleration.
OR
(a)
Discuss the factors affecting steady state stability.
(b)
Why steady state limit is higher than transient stability limit?
(c)
Discuss the dynamics of synchronous machine and hence derive the swing equation.
Also write stability condition from swing curve.
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About this paper
Official Gujarat Technological University (GTU) examination paper for Interconnected Power System (Summer 2026, B.E. · Electrical Engineering, Sem 7). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.