Dr. A.P.J. Abdul Kalam University MTECH I SEM (PS) Advance Course in Electrical Machines (MTPS-105) Dec 2020 Question Paper

Dr. A.P.J. Abdul Kalam University

Master of Technology

First Semester Main Examination, Dec-2020

Advance Course in Electrical Machines (MTPS-105)

Time: 3:00 Hrs ___ Max Marks 70

Note : Attempt any five questions out of eight. All questions carry equal marks.

Q.1 (a) Explain the basic reason of using transformation in electrical machines.

(b) Give the steady state and transient analysis of DC machine and obtain the

expression of speed in term of other parameter, draw its characteristics also.

Q.2 (a) Describe the steady state operation using Krons primitive model and

equivalent circuit of three phase induction motor.

(b) Derive voltage and torque equation for steady state operation of single

phase induction motor.

Q.3 (a) Obtain the transformation equation for rotating three phase winding of

synchronous machine.

(b) Derive simplified equations of a synchronous machine with two damper

coils.

Q.4 (a) Explain the construction and working principle of scharge motor.

(b) Explain how Park’s transformation transforms in a, b, c variable to d, q, o

variable?

Q.5 (a) Draw the equivalent circuit for a polyphase induction motor and state what

is represented by the various parameter involved in this circuit?

(b) Derive voltage and power equation for salient alternator using diagram.

Q.6 (a) Discuss the problems of power system analysis.

(b) Explain line to line short circuit analysis of generator.

Q.7 (a) A 3 – phase, 4 – pole, 50Hz induction motor develops an electrical torque of

7

50 Nm at a slip of 0.10 under no load, the motor is running with slip of 0.01. If a

load torque 30 Nm is suddenly applied to the motor shaft.

Find the

i) Speed as a function of time.

ii) Total inertia of motor and connected load is 6 kgm2

(b) Explain dynamic performance of three phase induction motor.

Q.8 Write short note on :- (3.5 mark each)

(a) Cross Field Commutator Machine.

(b) Scharge Motor.

(c) Application of approximate method to power system analysis.

(d) Polyphase Induction Motor

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Dr. A.P.J. Abdul Kalam University MTECH I SEM (PS) Power Electronics Applications to Power Systems (MTPS-104) Dec 2020 Question Paper

Dr. A.P.J. Abdul Kalam University

Master of Technology

First Semester Main Examination, Dec-2020

Power Electronics Applications to Power Systems (MTPS-104)

Time: 3:00 Hrs Max Marks 70

Note: Attempt any five questions out of eight.

Q.1 (a) What is meant by reactive power capability of an alternator? 7

Explain capability curve.

(b) Explain the line loadabity of transmission line. 7

Q.2 (a) Write the algorithm for formation of bus impedance matrix. Also 7

mention the necessity for such matrix.

(b) Develop a mathematical model for phase shifting transformer. 7

Q.3 (a) How will you generate elements of GSDF (Generation Shift Distribution 7

Factor) for a bus system? Discuss its applications.

(b) Describe contingency. How it can be evaluated and what are the precontingency corrective scheduling? 7

Q.4 (a) Describe proximity indicators for voltage stability. 7

(b) What is the significance of ranking in power system? 7

Q.5 (a) Explain basic principles of FACTS in the transmission of power. 7

(b) Compare the performance of TSC and SVCs. 7

Q.6 (a) Explain the effect of shunt compensation in power system with necessary

derivation. 7

(b) Describe the reasons for variation of voltages in power system. 7

Q.7 (a) Discuss the basic principle and basic modes of operation of TCSC. 7

(b) Explain in brief the analysis of transient stability model of TCSC. 7

Q.8 Write short note on :- (3.5 mark each)

(a) Surge Impedance Loading

(b) Power System Security Levels

(c) Line Outage Distribution Factors

(d) Reactive Power Control

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Dr. A.P.J. Abdul Kalam University MTECH I SEM (PS) Advance Power System Protection Relays [MTPS103] Dec 2020 Question Paper

Dr. A.P.J. Abdul Kalam University 

Master of Technology

First Semester Main Examination, Dec-2020

Advance Power System Protection Relays [MTPS103]

Time: 3:00 Hrs Max Marks 70

Note: Attempt any five questions out of eight. All questions carry equal marks.

Q.1 (a) Enlist the advantages and disadvantages of static relays. Explain the different

types of amplitude and phase comparators with neat sketches.

(b) What is Protective relay? Explain its functional characteristics.

Q.2 (a) Explain sampling circuit and zero crossing detector.

(b) Explain the principle of operation of distance relays and discuss the effect of

power swing and fault impedance on distance relay.

Q.3 (a) Explain the working principle of directional and non- directional type over

current relays.

(b) Explain the construction, working principle and characteristics of reactance type

distance relays.

Q.4 (a) Explain the construction, working principle and characteristics of percentage

differential relay for internal and external fault.

(b) Draw the block diagram of Static relay and explain various functional blocks

with individual circuits.

Q.5 (a) Explain the Duality between of amplitude and phase comparators.

(b) Explain the carrier system of protection. With the block diagram and neat

sketches discuss how the phase comparison scheme can be used for protecting a

transmission line.

Q.6 (a) What causes loss of Prime movers? Explain it.

(b) Explain earth fault protection. Explain Generator transformer unit protection

Q.7 (a) Explain high impedance bus differential scheme for bus bar protection.

(b) Describe with block diagram the principle of operation of microprocessor based

percentage differential relay scheme for the operation of a power transformer.

Q.8 Write Short notes on

(a) Time delay cuts and level detectors

(b) Hall effect comparator

(c) Bus bar differential protection

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Dr. A.P.J. Abdul Kalam University MTECH I SEM (PS) Power System Dynamics Analysis and Control [MTPS102] Dec 2020 Question Paper

Dr. A.P.J. Abdul Kalam University

Master of Technology

First Semester Main Examination, Dec- 2020

Power System Dynamics Analysis and Control [MTPS102]

Time: 3:00 Hrs Max Marks 70

Note: Attempt any five questions out of eight.

All questions carry equal marks.

Q.1 (a) Explain in brief voltage stability and voltage collapse and also factor

affecting it.

(b) Explain briefly the Fundamental concept of stability of dynamic system.

Q.2 (a) Derive Voltage and Torque equation of synchronous machine.

(b)Write short notes on saturation model of synchronous machine.

Q.3 Define system security. Describe power system static security level.

Q.4 (a) Differentiate between Rotor angle stability and voltage stability.

(b) Explain the parks transformation.

Q.5 (a) Simplified representation of excitation control

(b) Differentiate steady state stability and transient stability analysis.

Q.6 (a) Explain equivalent circuits and phasor representation used in steady state

analysis of synchronous machine.

(b) Describe the transient analysis of a synchronous machine.

Q.7 (a) Describe the modeling of the various components of the Excitation

system.

(b) Explain the Various control and protective scheme of Excitation system.

Q.8 Write short notes on:

(a) Modeling of transmission line

(b) static load representation

(c) modeling of SVC.

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Dr. A.P.J. Abdul Kalam University MTECH I SEM (PS) DSP and its Application [MTPS101] Dec 2020 Question Paper

Dr. A.P.J. Abdul Kalam University 

Master of Technology

First Semester Main Examination, Dec-2020

DSP and its Application [MTPS101]

Time: 3:00 Hrs Max Marks 70

Note : Attempt any five questions out of eight. All questions carry equal marks.

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