MEEPP104/MEEES106-1 Advanced Power System Stability M.Tech Model Question Paper : mgu.ac.in

Name of the College : Mahatma Gandhi University
Department : Electrical and Electronics Engineering
Subject Code/Name : MEEPP 104/MEEES 106-1/ Advanced Power System Stability
Sem : I
Website : mgu.ac.in
Document Type : Model Question Paper

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I : https://www.pdfquestion.in/uploads/mgu.ac.in/5053-1-MEEPP%20104%20Advanced%20Power%20System%20Stability%20-1.pdf
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MGU Advanced Power System Stability Question Paper

M.TECH Degree Examination :
Model Question Paper – II
First Semester

Related / Similar Question Paper : MGU M.Tech Power Electronic Circuits Question Paper

Branch: Electrical and Electronics Engineering
Specialization:
1. Power Electronics and Power Systems
2. Energy Systems
MEEPP 104 / MEEES 106-1 Advanced Power System Stability
(2013 admission onwards)
Time: Three Hours
Maximum: 100 Marks
All questions carry equal marks :
I (a) Explain in detail the power system stability problems. (10 Marks)
(b) From the fundamentals develop the flux linkage equations of the synchronous machine and draw its equivalent circuits? (15 Marks)
OR

II (a) Draw and explain the model of a detailed excitation control system. What are the different IEEE models for use in transient and small signal stability studies? (13 Marks)
(b) Explain the two axis model for a cylindrical rotor machine? (12 Marks)

III (a) What is power angle diagram? Explain clearly the equal area criterion for studying the transient stability of a power system. (10 Marks)

(b) A 50Hz, 4-poloe turbo generator rated 20MVA, 13.2KV has an inertia constant of H=9.0KW-Sec/KVA. Determine the K.E. stored in the rotor at synchronous speed. Determine the acceleration if the input less the rotational losses is 25000HP and the for a electric power developed is 15000KW.

If the acceleration computed for the generator is constant period of 15 cycles, determine the change in torque angle in that period and the rpm at the end of 15 cycles. Assume that the generator is synchronized with a large power system and has no accelerating torque before the 15 cycle period begins. (10 Marks)
(c) Write note on transient energy function approach. (5 Marks)
OR

IV (a) Explain the numerical methods used for the analysis of transient stability. (15 Marks)
(b) Explain the factors influencing transient stability. (10 Marks)

V (a) What are the causes of voltage instability? Explain the various system design and operating measures to prevent voltage collapse. (10 Marks)
(b) Discuss the various methods of improving small signal stability. (10 Marks)
(c) Write note on continuation power-flow analysis. (5 Marks)
OR

VI (a) Sketch the block diagram representation of the small signal performance of the system. Represent the dynamic characteristics of system in terms of K constants. Derive the expression for K constants. (20 Marks)
(b) Write notes on small signal stability on multi-machine system. (5 Marks)

VII (a) Explain in detail high speed fault clearing, dynamic breaking, reactor switching, independent pole operation of circuit breakers. How these methods achieve the transient stability objectives. (20 Marks)
(b) Write short note on fast valving technique for steam turbines. (5 Marks)
OR

VIII (a) Explain in detail small signal stability enhancement. (10 Marks)
(b) Explain in detail voltage stability enhancement. (10 Marks)
(c) Write note on high speed excitation systems. (5 Marks)

M.Tech Degree Examination :
Model Question Paper – I : First Semester
Branch : Electrical and Electronics Engineering
Specialization :
1. Power Electronics and Power Systems
2. Energy Systems
Time : Three Hours
Maximum : 100 Marks
All questions carry equal marks.
I (a) Develop the steady state equations and phasor diagrams, when the machine connected to an Infinite bus with local load at machine terminal.
(i) Resistive load
(ii) Arbitrary load (25 Marks)
OR

II (a) What is modified park transformation?
Let va (t) = Vm cos (ωRt+α)
Vb (t) = Vm cos (ωRt+α-2π/3)
Vc (t) = Vm cos (ωRt+α+2π/3)
Find the voltages vd and vq as related to the rms voltage V (15 Marks)
(b) Explain the two axis model for a cylindrical rotor machine? (10 Marks)

III (a) Find the critical clearing angle for the system shown for a three phase fault at the point P. The generator is delivering 1.0 p.u power under pre-fault conditions. (10 Marks)
(b) Explain the factors influencing transient stability. (10 Marks)
(c) Write note on transient energy function approach. (5 Marks)
OR

IV (a) What is power angle diagram? Explain clearly the equal area criterion for studying the transient stability of a power system. (10 Marks)
(b) Explain the numerical methods used for the analysis of transient stability. (15 Marks)

V (a) Explain in detail the eigen properties of the state matrix. How eigen values effect the stability of a system. (20 Marks)
(b) Write note on safety measures taken for to prevent voltage collapse. (5 Marks)