MID SEM TEST SYLLABUS

SUBJECT : ELECTRICAL MACHINES -I

SUBJECT CODE : 3140913

SEMESTER : 4^TH

1.    Magnetic fields and magnetic circuits:

Review of magnetic circuits - MMF, flux, reluctance, inductance; Visualization of magnetic fields produced by a bar magnet and a current carrying coil - through air and through a combination of iron and air. Review of Ampere’s law and Biot Savart law.

2.Principles of Electromechanical Energy Conversion:

B-H curve of magnetic materials; flux-linkage vs current characteristic of magnetic circuits; linear and nonlinear magnetic circuits; energy stored in the magnetic circuit; force as a partial derivative of stored energy with respect to position of a moving element; torque as a partial derivative of stored energy with respect to angular position of a rotating element.

2.    DC Machines:

Review of construction and working of a DC machine, visualization of magnetic field produced by the field winding excitation with armature winding open, air gap flux density distribution, flux per pole, induced EMF in an armature coil. Armature winding and commutation – Elementary armature coil and commutator, lap and wave windings, construction of commutator, Commutation, armature MMF wave,  armature reaction, air gap flux density distribution with armature reaction. Armature circuit equation for generation, Types of field excitations – separately excited, shunt and series. Open circuit characteristic of separately excited DC generator, voltage build-up in a shunt generator, critical field resistance and critical speed.

3.      Transformer:

Review of construction and working principle of single-phase and three-phase transformers, equivalent circuit, phasor diagram, voltage regulation, losses and efficiency. Testing - open circuit and short circuit tests, polarity test, back-to-back test, separation of hysteresis and eddy current losses.

SYLLABUS FOR MID SEM : ELECTRICAL POWER SYSTEM – II (2160908) 6th SEM

Syllabus for Mid sem Exam EPS II

6TH Semester Electrical Engineering Feb- March 2020

Unit 1: Current and Voltage Relations on a Transmission Line

Course outcome 1: Analyze the performance of Short and Medium transmission line.

Representation of line, The short transmission line, The medium-length line, The long transmission line: Solution of the differential equations, The long transmission line: Interpretation of the equations, The long transmission line: Hyperbolic form of the differential equations, The equivalent circuit of a long line, Power flow through a transmission line (circle diagrams), Reactive compensation of transmission lines.

Unit 2: Symmetrical Three-Phase Faults

Course outcome 3: Analyze Symmetrical and Unsymmetrical faults in power systems.

Transients in RL Series circuits, Short-Circuit currents and the reactances of Synchronous machines, Internal voltages of loaded machines under transient conditions, The bus impedance matrix in fault calculations, A bus impedance matrix equivalent network, The selection of circuit breakers.

Unit 3: Symmetrical Components

Course outcome 2: Describe the symmetrical components and its applications.

Synthesis of Unsymmetrical phasors from their symmetrical components, The symmetrical components of unsymmetrical phasors, Phase shift of symmetrical components in Star-Delta Transformer Banks [2], Power in terms of symmetrical components, Sequence circuits of Y and Δ impedances, Sequence circuits of a symmetrical transmission line, Sequence circuits of the synchronous machine, Sequence circuits of a Y- Δ transformer, Unsymmetrical series impedances, Sequence networks

MID SEM TEST SYLLABUS

SUBJECT : DESIGN OF DC MACHINES AND TRANSFORMER

SUBJECT CODE : 2160912

SEMESTER : 6^TH

Ch – 1 :GENERAL DESIGN ASPECTS:

Specific electric loading and Specific magnetic loading;

 Output coefficient; Output equations for transformers and

 rotating machines;Factors affecting size of machines;

 Criteria for selection of specific loadings; Heating and

Cooling of Transformers and rotating machines

Ch – 2 :DESIGN OF THREE PHASE TRANSFORMER:

Types of transformers; Position of HV and LV windings and

 its importance; Relation between core and yoke cross

section area and its significance; Different types of transformer

 windings; Different positions of taping; Window space factor;

 Factors affecting window space factor; Relation between

emf per turn and transformer rating; Stacking factor.

MAIN DIMENSIONS:

Design of window dimensions, yoke dimensions and overall

core dimensions; Numerical examples.

DESIGN OF WINDINGS:

Design of HVand LV windings (No. of turns and area of

cross section); Selection of type of winding.

PERFORMANCE PARAMETERS ESTIMATION:

Primary and secondary winding resistance and Leakage reactance

 calculation; Calculation of no load current, losses and temperature

 rise of transformer;

Ch -3 : DESIGN OF DC MACHINES:

Introduction; Output equation; MMF calculation; Selection of

 number of poles; Design of core length and armature diameter;

 Carter’s fringing curves and its significance; Design of length

of air gap; Numerical examples.

ARMATURE DESIGN:

Choice of armature winding; Armature conductor; Number of

 armature slots; Slot dimensions; Slot loading; Design of armature

 core; Numerical examples.

DESIGN OF FIELD SYSTEMS:

Pole design; Design of field winding of shunt, series and compound

 machines;

                    

Question bank  (6Th semester)
Design of D C Machines & Transformer[ 2160912]
1	Derive an output equation of DC machines with usual notation
2	Briefly explain the factors affecting window space factor on transformer
3	Derive the relation between Emf per turn(Et) and transformer rating(Q)
4	How will the output and losses in transformer vary with linear dimensions?
5	How area of core is affected by weight of copper and iron.
6	Explain technical reasons for: 1.   Circular coils are preferred in transformer winding. 2.   Tapping’s are usually provided on H.V. Side of Transformer
7	From the design data discuss how no load current can be estimated in 3-phase core type transformer.
8	Derive the expression for finding leakage reactance of three phase core type Transformer.
9	The length of the air-gap is not uniform under the entire pole face. Why it is so?
10	Explain criteria for selection of specific loading in d c machine.
11	Write a short note on heating of electric machine.
12	Explain how pole body height is fixed while designing field system of a DC machines
13	Explain steps to design field winding of a D.C. machine.
14	Explain various factor affecting selection of number of poles for D.C. machine
15	List out diff. types of winding used in 3- phase transformer with its voltage rating. Also explain any one in detail
16	Explain the process of design of LV and HV winding of a transformer.
17	Explain the process of design of core of a transformer.
18	Explain effect of change in frequency on losses, voltage & leakage impedance    of transformer.
19	Explain various factors affecting selection of air gap length in dc machine.
20	Derive an expression of the number of Coils of DC machine armature from design parameter with usual notations
21	Explain guiding factors for choice of no of armature slots. Also show the slot  view with insulations
22	Explain diff. cooling methods used for oil immersed transformer
23	Explain : a. Significance of mitered joints in transformer. b. Design difference between power & distribution transformer.
24	Derive an output equation of single phase Transformer with usual notation
25	Derive an output equation of Three phase Transformer with usual notation

Mid sem -march-2020 Syllabus of Sub: power system Operation and control (2180909) 8th sem

Module 1.Automatic Generation and Voltage Control: 
Course Outcome 1: Relates the techniques to control power flows, frequency, and voltage. :5marks compulsory

Introduction; Load Frequency Control (Single Area Case); Load Frequency Control and Economic Despatch Control; Two-Area Load Frequency Control; Optimal (Two-Area) Load Frequency Control; Automatic Voltage Control; Load Frequency Control with Generation Rate Constraints (GRCs); Speed Governor Dead-Band and Its Effect on AGC; Digital LF Controllers; Decentralized Control.

Modul 2: Power System Security: 

Course Outcome 2:Determine power system security and Apply it for power system planning.  5 marks compulsory

Introduction; System State Classification; Security Analysis; Contingency Analysis.

Module 3.Reactive Power and Voltage Control: Introduction; 

Course Outcome 3: Determine Reactive power requirement  for the transmission line 

Q.2  a and b   or  Q.2 a and b  10  marks

Reactive power requirement of an uncompensated line; Implication of surge impedance loading; Reactive loss characteristics of transmission line; Operation of a transmission line at no load condition; Operation of a transmission line under heavy loading condition; Voltage regulation of the transmission line and its relation with reactive power; Maximum power transfer in an uncompensated line; Line loadability. Reactive power-voltage (Q-V) coupling concept; Governing effects on reactive power flow; Relation between voltage and reactive power at a node in a power system; Reactive power requirement for control of voltage in long lines; Operational aspects in reactive power and voltage control; Basic principle of system voltage control; Reactive power flow constraints and their implications in loss of voltage;

Module 4 State Estimation: Introduction;
Course Outcome 4 Perform a system state estimation and explore its importance.

  Q.3  a and b   or  Q. 3 a and b  10  marks

  Least Squares Estimation: The Basic Solution; Static State Estimation of Power Systems; Tracking State Estimation of Power Systems; Some Computational Considerations; External System Equivalency; Treatment of Bad Data; Network Observability and Pseudo-Measurements; Application of Power System State Estimation

6TH SEM MID EXAM SYLLABUS (PE-II)

Syllabus of Power Electronics –II (2160902) Theory Mid Exam of 30 Marks
6TH Semester Electrical Engineering Feb- March 2020
Unit 1- DC TO AC CONVERTERS: INVERTERS
Performance parameters of Inverters; Classification of Inverters: Voltage source inverters and Current source inverters; Single phase inverters: series, parallel and bridge type (Half wave and Full wave) inverters; Forced Commutated, Line commutated and Self-Controlled Switches based Inverters; Three phase bridge inverters: 180 degree conduction, 120 degree conduction and their comparison PWM Inverters: Principle of PWM control, PWM techniques classifications, Unipolar and Bipolar PWM, Effect of Switching frequency on Harmonic Spectrum, Sinusoidal PWM, Third harmonic PWM, Selective Harmonic Elimination, Hysteresis band current control PWM, Space vector pulse width modulation technique, Comparison of PWM techniques, Voltage and frequency control of single phase and three-phase inverters, Harmonic Cancellation techniques.
Unit 2- AC VOLTAGE CONTROLLERS:
Concept of On-Off or integral cycle control and Phase control; Various single phase full wave ac-ac controllers with R, L and RL load; Analysis for phase control and integral cycle control; Gating requirements; Sequence Control of AC regulators; 3-phase full wave converter configurations with Y and Δ connected loads and their analysis with R load; AC Voltage controller with PWM control; Basic principle of matrix converter
Unit 3- CYCLOCONVERTERS
Introduction; Basic Principle; Single to single-phase cycloconverters; Three-phase half-wave cycloconverters; Cycloconverters for three phase output; Output voltage equation; Output harmonics in cycloconverter; Comparison between cycloconverter and DC link Converter; Load Commutated cycloconverter.
Unit-4 Synchronous Motor Drives
Three phase synchronous motors; variable speed drives; variable frequency control; self-controlled synchronous motor drive employing load commutated thyristor inverter, self controlled synchronous motor drive employing a cycloconverter.

Course Outcome: After learning the course the students should be able to:
C1. Analyze, operate and design dc-to-ac inverters.
C2. Analyze, operate and design ac-to-ac converters.
C3. Apply the knowledge of power electronic converter for speed control of AC motors.

Reference Books:
1. M D Singh and K B Khanchandani, “Power electronics”, TMH, New Delhi, 2nd ed., 2007.
2. Muhammad H. Rashid, “Power Electronics - Circuits, Devices and Applications”, Prentice Hall of India, 3rd ed., 2003.
3. Vedam Subramanyam, “Power Electronics – Devices, Converters and Applications”, New Age International Publishers Pvt. Ltd., Bangalore, 2nd ed. 2006.
4. P.S. Bimbhra, “Power Electronics”, Khanna Publishers, New Delhi, 2012.
5. Ned Mohan, Undeland and Robbins, “Power Electronics – Converters, Applications and Design”, John Willey & sons, Inc., 3rd ed., 2003.

MSE SYLLABUS FOR 6 TH SEM: HIGH VOLTAGE ENGINEERING (2160904)

MSE SYLLABUS FOR 6 TH SEM,

SUB: HIGH VOLTAGE ENGINEERING (2160904)

1.      Electrical breakdown in gases Gases as insulating media - ionization and decay processes, Townsend first ionization coefficient, photo ionization, ionization by interaction of metastable with atoms, thermal ionization, deionization by recombination, deionization by attachment–negative ion formation, examples - cathode processes – secondary effects, photoelectric emission, electron emission by positive ion and excited atom impact, thermionic emission, field emission, Townsend second ionization coefficient, secondary electron emission by photon impact, examples - transition from non-self-sustained discharges to breakdown, the Townsend mechanism, examples - the streamer or ‘kanal’ mechanism of spark, examples - the sparking voltage–Paschen’s law, penning effect, the breakdown field strength, breakdown in non-uniform fields partial breakdown, corona discharges.

2.      Breakdown in liquid: Liquid as insulators, breakdown in liquids - electronic breakdown, suspended solid particle mechanism, cavity breakdown, examples - static electrification in power transformers, transformer oil filtration, transformer oil test, alternative liquid insulations like vegetable oils, esters and silicon oils.

3.      Generation of high voltages : Generation of high direct voltages, half and full wave rectifier circuits, voltage multiplier circuits, Van de Graff generators, electrostatic generators, examples - generation of alternating voltages, testing transformers, cascaded transformers, resonant transformers, examples - impulse voltages, Standard lightning and switching surge and associated parameters and their corrections, impulse voltage generator circuits, Marx circuit, operation, design and construction of impulse generators, examples - impulse current generator - control systems.

4.       Measurement of high voltages: High direct voltage measurement, peak voltage measurements by spark gaps, sphere gaps, reference measuring systems, uniform field gaps, rod gaps, factors affecting sphere gap measurements, examples - electrostatic voltmeters - ammeter in series with high ohmic resistors and high ohmic resistor voltage dividers - generating voltmeters and field sensors - the measurement of peak voltages.

5.       Non-destructive insulation test techniques: Measurement of d.c. resistivity - dielectric loss and capacitance measurements, the Schering bridge, current comparator bridges, Tan Delta measurement

6.       High voltage testing: Testing of insulators and bushings, testing of isolators and circuit, Breakers testing of cables, testing of transformers - testing of surge diverters - radio interference measurements - design, planning and layout of high voltage laboratory.

MID SEM-1 syllabus of Subject PE-1(3140915) ,4th Sem

MID SEM-1 syllabus of Subject PE-1(3140915) ,4th Sem

1	Power switching devices Diode, Thyristor, MOSFET, IGBT; Static characteristics of these devices; Operation of power devices as switches and switching losses, Single-quadrant switches, two-quadrant and bidirectional switches; Firing circuit for thyristors; Gate drive circuits for MOSFET and IGBT.
2	DC-DC converters - Switching Voltage Regulators Linear voltage regulator, Concept of switching voltage regulators and advantages, Operation and Principle of Basic DC-DC converter topologies like Buck, Boost and Buck Boost converter, Various control techniques for output voltage control, Mathematical analysis for these converters for steady state, Concept of CCM and DCM and factors affecting them, Closed loop control for voltage regulation, Isolated converters: Forward converter and Flyback converter; Multi-quadrant operation of DC-DC converters; Applications
3	DC-AC converters – Inverters Classification of Inverters, Half-bridge and full-bridge single-phase voltage source inverter, switch states and instantaneous output voltage, square wave operation of the inverter, concept of average voltage over a switching cycle, bipolar sinusoidal modulation and unipolar sinusoidal modulation, modulation index and output voltage, three-phase sinusoidal modulation, Three phase bridge inverter – 180◦ and 120◦ conduction mode, SPWM control, Third harmonic injection, SVPWM, Output voltage and frequency control, Harmonic spectrum, Harmonics and its effects, Applications

Note:  Refer standard books as a reference.
Course Outcomes for the subject: Power Electronics-1

Note: It is likely that question paper will be set as per Course Outcome mentioned below.

Sr. No.	CO statement
CO-1	To understand the differences between signal level and power level devices.
CO-2	To understand the construction of power converters.
CO-3	To analyse the operation of power converters.
CO-4	To understand the applications of power converters

Faculty: Prof. P.K.Shah/Prof.A.K.Giri/Prof.N.N.M                       

Reference Books:1. M. H. Rashid, “Power electronics: circuits, devices, and applications”, Pearson Education India,
2009.
2. N. Mohan, T. M. Undeland, W.M. Robbins, “Power Electronics: Converters, Applications and
Design”, Wiley India Edition, 2007.
3. R. W. Erickson and D. Maksimovic, “Fundamentals of Power Electronics”, Springer Science &
Business Media, 2007.
4. P.S. Bimbhra, “Power Electronics”, Khanna Publishers, New Delhi, 2012..
5. L. Umanand, “Power Electronics: Essentials and Applications”, Wiley India, 2009

 

Mid sem Exam Time Table FEB/March 2020

“એક ભારત શ્રેષ્ઠ ભારત” પ્રોગ્રામ

“એક ભારત શ્રેષ્ઠ ભારત” પ્રોગ્રામ અંતર્ગત સ્ટુડન્ટ એક્સચેન્જ પ્રોગ્રામમાં આપણાં (ઇલેક્ટ્રિકલ ઈજનેરી) વિભાગનાં ત્રણ (૩) વિધ્યાર્થીઓ અને બે (૨) વિધ્યાર્થિનીઓ (કુલ પાંચ -૫) છત્તીસગઢ ખાતેની સરકારી કોલેજમાં ૫-દિવસના કલ્ચર પ્રોગ્રામ ટૂર પર મોકલવામાં હોવાથી નામ સોમવાર, તા: ૨૪/૦૨/૨૦૨૦ સાંજે ૦૫:૩૦ સુધીમાં શ્રી ડી.ડી.પટેલ ને આપી દેવા જણાવવામાં આવે છે.

ટૂરની તારીખ આશરે ૦૯ માર્ચ ૨૦૨૦ રહેશે.

નોંધ: આ અંગે નો સંપૂર્ણ ખર્ચ સંસ્થા દ્વારા ભોગવવામાં આવશે.

Alumni Fee unpaid LIST

the list of students who have not paid the alumni fee is given below.


Alumni unpaid LIST



Alumni fee is compulsory and those students who do not pay Rs. 200/- alumuni fee will not be allowed to fill the examination form and also not to allowed to sit in theory examination.