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S.R.T. Marathwada University, Nanded SYLLABUS FOR Ph.D. ENTRANCE

FACULTY OF ELECTRICAL ENGINEERING

: PAPER-1:

Paper-1 consist of Section A and B. There will be negative marking for section `A' and `B'.

Section A:

Multiple Choice Questions ­ Forty Marks: 40 (01 mark each); `Research and Language Aptitude/General Knowledge/Numerical Ability/Reasoning' (Common paper for all candidates)

Section B:

Multiple Choice Questions ­ Thirty Questions; Marks: 30 (01 mark each); Time: 75 minutes for Section `A' and Section `B' Electric Circuits and Fields: Network graph, KCL, KVL, node and mesh analysis, transient response of dc and ac networks; sinusoidal steady-state analysis, resonance, basic filter concepts; ideal current and voltage sources, Thevenin's, Norton's and Superposition and Maximum Power Transfer theorems, two-port networks, three phase circuits; Gauss Theorem, electric field and potential due to point, line, plane and spherical charge distributions; Ampere's and Biot-Savart's laws; inductance; dielectrics; capacitance. Electrical Machines: Single phase transformer - equivalent circuit, phasor diagram, tests, regulation and efficiency; three phase transformers - connections, parallel operation; autotransformer; energy conversion principles; DC machines - types, windings, generator characteristics, armature reaction and commutation, starting and speed control of motors; three phase induction motors - principles, types, performance characteristics, starting and speed control; single phase induction motors; synchronous machines - performance, regulation and parallel operation of generators, motor starting, characteristics and applications; servo and stepper motors. Power Systems: Basic power generation concepts; transmission line models and performance; cable performance, insulation; corona and radio interference; distribution systems; per-unit quantities; bus impedance and admittance matrices; load flow; voltage control; power factor correction; economic operation; symmetrical components; fault analysis; principles of overcurrent, differential and distance protection; solid state relays and digital protection; circuit breakers; system stability concepts, swing curves and equal area criterion; HVDC transmission and FACTS concepts. Control Systems: Principles of feedback; transfer function; block diagrams; steady-state errors; Routh and Niquist techniques; Bode plots; root loci; lag, lead and lead-lag compensation; state space model; state transition matrix, controllability and observability. Electrical and Electronic Measurements: Bridges and potentiometers; PMMC, moving iron, dynamometer and induction type instruments; measurement of voltage, current, power, energy and power factor; instrument transformers; digital voltmeters and multimeters; phase, time and frequency measurement; Q-meters; oscilloscopes; potentiometric recorders; error analysis.

Analog and Digital Electronics: Characteristics of diodes, BJT, FET; amplifiers - biasing, equivalent circuit and frequency response; oscillators and feedback amplifiers; operational amplifiers - characteristics and applications; simple active filters; VCOs and timers; combinational and sequential logic circuits; multiplexer; Schmitt trigger; multi-vibrators; sample and hold circuits; A/D and D/A converters; 8-bit microprocessor basics, architecture, programming and interfacing. Power Electronics and Drives: Semiconductor power diodes, transistors, thyristors, triacs, GTOs, MOSFETs and IGBTs - static characteristics and principles of operation; triggering circuits; phase control rectifiers; bridge converters - fully controlled and half controlled; principles of choppers and inverters; basis concepts of adjustable speed dc and ac drives.

: PAPER-I: Section C

Paper I will have five groups, and the candidates will be required to answer two questions out of five from any one group only. Descriptive Questions ­ two questions out of five from any one sub-section; Marks: 30(15 marks each); Time: 60 minutes for Paper-I. Section C

Group-I: ELECTRICAL MACHINES

Basic Principles of Electrical Machine Analysis, Magnetically Coupled Circuits, Electromechanical Energy Conversion, Machine Windings and Air-gap MMF, Winding Inductances and Voltage equations Elementary Direct-Current Machine, Voltage and Torque Equations in Machine Variables, Basic Types, Block Diagram, Static, Dynamic Characteristics, Linearized Machine Equations, Speed Control Equations of Transformation Change of Variables, Stationary Circuit Variables Transformed to the Arbitrary Reference Frame, Commonly Used Reference Frames, Transformation Between Reference Frames, Transformation of a Balanced Set, Balanced Steady State Phasor Relationships, Balanced Steady State Voltage Equations, Variables Observed from Several Frames of Reference Theory of Symmetrical Induction Machines and Synchronous Machines, Voltage Torque Equation in Machine Variables, Equations of Transformation for Rotor Circuits, Voltage Equations in Arbitrary Reference-Frame Variables, Torque Equation in Arbitrary ReferenceFrame Variables, Commonly Used Reference Frames Per Unit System, Analysis of Steady State Operation, Free Acceleration Characteristics, Free Acceleration Characteristics Viewed from Various Reference Frames, Dynamic Performance During Sudden Changes in Load Torque, Dynamic Performance During a Three-Phase Fault at the Machine Terminals, Approximate Transient Torque Versus Rotor Angle Characteristics , Comparison of Actual and Approximate Transient Torque-Angle Characteristics during a Sudden Change in Input Torque, First Swing Transient Stability Limit, Comparison of Actual and Approximate Transient Torque-Angle Characteristics, Critical Clearing Time, Equal-Area Criterion Servo motors - symmetrical components applied to two - phase servo motors - equivalent circuit and performance based on symmetrical components - servo motor torque - speed curves. Stepper motors - construction features - method of operation - drive - amplifiers and transistor logic - half stepping and the required switching sequence - the reluctance type stepper motor ratings and other characteristics Reluctance motors - general - types of synchronous motors - reluctance - motors - definitions construction - polyphase and split phase reluctance motors - capacitor type reluctance motors hysteresis motors - construction - polyphase - capacitor type and shaded pole hysteresis motors universal motors - universal motors - application and torque - characteristics - essential parts of universal motors Switched Reluctance Motor: Construction, operating performance, control and applications.

Linear machines - basic difference between LEMS and rotating - machine - classification of LEMS, linear motors and levitation machines - linear induction motors - linear synchronous motors - DC linear motors - linear levitation machines Induction generators: self excitation requirements, steady state analysis, voltage regulation, different methods of voltage control, application to mini and micro hydel systems. Doubly fed induction machines: control via static converter, power flow, voltage/frequency control (generation mode), application to grid connected wind and mini/micro hydel systems. Brushless DC Machines: construction operation, performance, control and applications. Application of permanent magnets in electrical machine: structure, magnetic materials used, types of motors e.g. PMDC and PM Synchronous Machine, control and applications. Recent developments in electrical machines. Books 1. P.C. Krause, Analysis of Electric Machinery, McGraw Hill, NY, 1987 2. C.V. Jones, The unified Theory of Electrical Machines, Butterworth,-London, 1967 3. Stevenson, Power System Analysis, McGraw Hill, NY 4. Dhar R.N., Computer Aided Power System Operation and Analysis, Tata McGraw Hill 5. P.S. Bhimbra, The Generalised Theory of Electrical Machines, Tata McGraw Hill 6 Toro.V.D, Electric machines and power systems, Prentice Hall of India, 1985. 7 Veinott, Fractional horse power electric motors, Mc Graw Hill, 1948 8 Nasar.S.A,Boldeal, Linear Motion Electric machine, John Wiley,1976 9 A. E. Fitzergerald, C.Kingsly, S.D.Umas,'Electric Machinery',TMH

Group-II: Electrical Power Systems

Power Planning, Strategic Planning, National and Regional Planning, Planning Tools, Planning Organization, Electricity Regulation. Forecasting and Planning, Classification and Characteristic of Loads, Long Term, Mid Term and Short Term Forecasting, Forecasting Techniques and its Modeling, Spatial Load Forecasting, Peak Load Forecast, Reactive Load Forecast. Generation, Transmission and Distribution Planning, Planning Software Packages, Power Sector, Finance Institutions, Reforms to Power Structure, Restructuring of System, Deregulation IPPS, Project Financing Alternatives, Modes of Contracting ( BOT etc). Economic Operation, System Interconnection and Integrated Operation, Thermal Unit Characteristics, Transmission Loss Formula and its Coefficients, Practical Calculation, Evaluation and Application of Economic Scheduling of Generation Automatic Generation and Voltage Control, Load Frequency Control (Single Area and Two Area Load Case) and Economic Dispatch Control, Basic Concepts of Load Dispatch Centers, Functions of Energy Management Centers, Emergency and Restoration of Power System, Automatic Voltage Control, Load Frequency Control with GRCS Digital L F Controllers, Decentralized Control. Reactive Power Control, Methods for Reactive Power Control Operation and Control of Interconnected Power System, Functions of SCADA System, Common Features to All SCADA System, Alarm Function, Integration of Measurement, Control and Protection Functions by SCADA System, SCADA Configuration, Distribution Automation and Control Requirements of Reliable Power System, Basic Concepts of Stability, Modeling of Power System Components, Synchronous Machine, Excitation Systems and Governor System Response to Small Disturbances, Synchronous Machine-State Space Representation, Determination of Machines Parameter from Manufacturers Data. Excitation System, Effect on Stability, Analysis of Single and Multi-Machine Systems, Transient Stability Analysis and Control, Mitigation Using Power System Stabilizers, Introduction to Voltage Instability Power System Operational States, Power System Study Areas, Protective Relaying Problem, Terminology, Design Requirement, IEEE Standard for Relays and Relay Systems Associated with Electric Power Apparatus

Static Relays, Solid State Devices Used in Static Protection, Amplitude and Phase Comparator, Synthesis of Various Relays Using Static Comparators e.g. Mho, Reactance, Impedance, Quadrilateral Distance Relay Protection Schemes for Transformer, Generators and Transmission Lines. Digital Signal Processing Based Relays, Numeric Relay Algorithms for Over-Current Relay, Distance Relay, Directional Comparison Relay, Differential Relay, Wavelet Applications in Protection Newer Relay Design Philosophies, Basics of Fuzzy Set Theory, Comparison and Integration with Expert System, Application of Fuzzy Logic, Neural Networks and Genetic Algorithm to Protection Relaying Books: 1. R.N. Sullivan, Power System Planning, Tata McGraw Hill 2. A.S. Pabla, Electrical Power System Planning, Mc Millan India Ltd. 3. L.K. Khirchmayer, Economic operation of Power System, Willey Eastern Ltd. 4. P.S.R. Murty, Power System Operation & control, Tata McGraw Hill 5. I. J. Nagrath, D.P.Kothari, Modern Power System Analysis, Tata McGraw Hill 6. S. Rao, EHV-AC, HVDC Transmission & Distribution Engineering, Khanna Publishers 7. P. M. Anderson and A.A. Fouad, Power System Control and Stability, IOWA state university press, USA 8. P.Kunder, Power System stability and Control, McGraw Hill, New York 9. P. Sauer and M.A. PAI, Power system dynamics and stability, Prentice Hall, 1997 10. K.R.Padiyar, Power System Dynamics, Stability and Control, Edition II Interline Publishers, Bangalore, 1996 11. Y.G. Paithankar, S.R. Bhide, Fundamentals of Power System Protection, Prentice-Hall India, 2003 12. A.G. Phadke, J.S. Thorpe, Numerical Relaying for Power Systems, John Wiley and Sons, 1988 13. Mohinder Sachdeva, Ratan Das, Understanding Microprocessor-Based Technology Applied to Relaying, Power System Relaying Committee, February 2004 14. Technical papers from IEEE PES Transactions (Power Delivery, Energy Conversion, and Power Systems) 15. L. P. Singh, Digital Protection, Protective Relaying from Electromechanical to Microprocessor, John Wiley & Sons,Inc,1995 16. Power System Protection 4, digital protection and signaling, Edited by the Electricity Training Association

Group-III: Electrical Drives

Basic power electronic drive system, components. Different types of loads, shaft-load coupling systems. Stability of power electronic drive. Conventional methods of D.C.motor speed control, single phase and three phase converter fed D.C motor drive. Power factor improvement techniques, Four quadrant operation. Chopper fed drives, input filter design. Step -up chopper for photovoltaic systems. Braking and speed reversal of DC motor drives using choppers, multiphase choppers. Conventional methods of induction motor speed control. Solid state controllers for Stator voltag control, soft starting of induction motors, Rotor side speed control of wound rotor induction motors. Voltage source and Current source inverter fed induction motor drives. Speed control of synchronous motors, field oriented control, load commutated inverter drives, switched reluctance motors and permanent magnet motor drives. Books 1. P.C Sen ,,Thyristor DC Drives, John wiely and sons, New York, 2001. 2. R.Krishnan, ,,Electric Motor Drives ­ Modeling, Analysis and Control, Prentice-Hall of India Pvt Ltd., New Delhi, 2003.

3. Bimal K.Bose, ,,Modern Power Electronics and AC Drives, Pearson Education (Singapore) Pte. Ltd., New Delhi, 2003.

Group-IV: Control Systems

Concepts of state, state variable, state model, state models for linear continuous time functions, diagonalization of transfer function, solution of state equations, physical systems and state assignment concept of controllability & observability State feedback by pole placement, observers, reduced order observers, deadbeat control and deadbeat observer Formulation of Optimal control problem, Lyapunov's stability theorem, Design of digital control systems by comparison with analogue response; Discrete PID controller. General predictive control, Basic approaches to adaptive control. Applications of adaptive control. Methods to improve robustness. Averaging analysis and tuned values. Books 1. S. Sastry and M. Bodson, Adaptive Control: Stability, Convergence, and Robustness, Prentice-Hall, 1989. 2. Gopal. M., "Control Systems: Principles and Design", Tata McGraw-Hill, 1997. 3. Kuo, B.C., "Automatic Control System", Prentice Hall, sixth edition, 1993. 4. Ogata, K., "Modern Control Engineering", Prentice Hall, second edition, 1991. 5. Nagrath & Gopal, "Modern Control Engineering", New Ages International

Group-V: High Voltage Engineering

Conduction & Break Down in Gases, Ionization Process & Current Growth, Townsend's Criterion for Break Down, Determination of Alpha & Gamma, Streamer Theory of Break Down in Gases, Paschen's Law, Breakdown in Non- Uniform Field & Corona Discharge. Conduction & Break Down in Pure Liquid & Commercial Liquid, Breakdown in Solid Dielectrics Generation of High Voltage & Currents, Generation of High D. C. Voltages, High Alternating Voltages & Impulse Voltages. Generation of Impulse Currents Measurement of High Voltages & Currents, Measurement of High Direct Current Voltages, High Alternating Voltages & Impulse Voltages. Measurement of High Direct Currents, High Alternating Currents & High Impulse Currents, Dielectric Loss & Partial Discharge Measurements Over Voltage Phenomenon & Insulation Coordination, Natural Causes for Over Voltages, Lightning Phenomenon, Over Voltages Due to Switching Surges, System Faults & Other Abnormal Conditions, Principles of Insulation Coordination on High Voltage & Extra High Voltage Power Systems High Voltage Testing of Power Apparatus Books 1) M S Naidu , V kamaraju, High voltage Engineering ,Tata McGraw ­Hill 2) E kuffel, W.S. Zaengl, J. Kuffel, High Voltage Engineering fundamentals, Butterworth ­ Heinemann publishers 3) Dieter kind, kurt feser, High Voltage Test Techniques, Vieweg/ SBA publications.

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