Saturday, December 22, 2018
Wednesday, December 5, 2018
Sunday, December 2, 2018
Friday, November 23, 2018
Monday, October 15, 2018
MDPI Open Access Publishing
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Friday, October 12, 2018
Tuesday, October 9, 2018
Sunday, October 7, 2018
Friday, October 5, 2018
Thursday, October 4, 2018
Sunday, September 23, 2018
Thursday, September 20, 2018
Wednesday, September 19, 2018
Sunday, September 16, 2018
Saturday, September 15, 2018
Sunday, September 2, 2018
Solar Thermal Assignment/Worksheet
Click the below link for Solar Thermal Assignment
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Tuesday, August 28, 2018
Monday, August 27, 2018
Sunday, August 26, 2018
Friday, August 24, 2018
Thursday, August 23, 2018
Wednesday, August 15, 2018
Monday, August 13, 2018
Thursday, June 28, 2018
Saturday, June 16, 2018
Wednesday, June 13, 2018
Wednesday, May 30, 2018
Tuesday, May 22, 2018
Saturday, May 19, 2018
Friday, May 11, 2018
Thursday, May 10, 2018
Tuesday, May 8, 2018
Monday, May 7, 2018
Sunday, May 6, 2018
Distribution Generation Microgrid ANNA UNIVERSITY SYLLABUS
PS5071
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DISTRIBUTED
GENERATION AND MICROGRID
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L
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T
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P
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C
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3
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0
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0
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3
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|||
UNIT I INTRODUCTION 9
Conventional power generation: advantages and
disadvantages, Energy crises, Non-
conventional energy (NCE) resources: review of
Solar PV, Wind Energy systems, Fuel Cells, micro-turbines, biomass, and tidal
sources.
UNIT II DISTRIBUTED GENERATIONS (DG) 9
Concept
of distributed generations, topologies, selection of sources, regulatory
standards/ framework, Standards for interconnecting Distributed resources to
electric power systems: IEEE 1547. DG installation classes, security issues in
DG implementations. Energy storage elements: Batteries, ultra-capacitors,
flywheels. Captive power plants
UNIT III IMPACT OF GRID INTEGRATION 9
Requirements for grid interconnection, limits on
operational parameters,: voltage, frequency, THD, response to grid abnormal
operating conditions, islanding issues. Impact of grid integration with NCE
sources on existing power system: reliability, stability and power quality
issues.
UNIT IV BASICS
OF A MICROGRID 9
Concept and definition of microgrid, microgrid
drivers and benefits, review of sources of microgrids, typical structure and
configuration of a microgrid, AC and DC microgrids, Power Electronics
interfaces in DC and AC microgrids
UNIT V CONTROL AND OPERATION OF MICROGRID 9
Modes of operation and
control of microgrid: grid connected and islanded mode, Active and
reactive power control, protection issues,
anti-islanding schemes: passive, active and communication based techniques,
microgrid communication infrastructure, Power quality issues in microgrids,
regulatory standards, Microgrid economics, Introduction to smart microgrids.
REFERENCES
1
Amirnaser Yezdani, and Reza Iravani, “Voltage
Source Converters in Power Systems: Modeling, Control and Applications”, IEEE
John Wiley Publications, 2010.
2
DorinNeacsu, “Power Switching Converters: Medium
and High Power”, CRC Press, Taylor & Francis, 2006
3
Chetan Singh Solanki, “Solar Photo Voltaics”,
PHI learning Pvt. Ltd., New Delhi,2009
4
J.F. Manwell, J.G. McGowan “Wind Energy
Explained, theory design and applications”, Wiley publication 2010.
5 D. D. Hall and R. P. Grover, “Biomass Regenerable Energy”, John Wiley,
New York, 1987.
6
John Twidell and Tony Weir, “Renewable Energy
Resources” Tyalor and Francis Publications, Second edition 2006.
Engineering Practices Lab Model Question -Electrical
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Make an industrial illumination circuit wiring using switches,
fuse, indicator, lamp and energy meter.
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Residential House Wiring
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Make a Residential house wiring using switches, Fuse, indicator,
lamp and energy meter.
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Conduct a suitable wiring experiment that can be applied to
festival lights employed in decorative purposes.
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Verify whether the starter is required or not for a fluorescent
lamp after the ignition.
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Fluorescent lamp
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Prove that the ignition voltage of light is increased with the
help of ballast by doing a suitable experiment.
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With the help of a two-way Switch, Control the given lamp load.
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Stair case Wiring
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Construct a wiring in such a way so that a single lamp can be
controlled from two different places and how many way switch you need for
that connection.
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Conduct a suitable experiment to measure the energy by using
single phase watt-hour meter.
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1 Phase Energy Meter
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Construct a circuit diagram with lamp load and meter which
measures the energy and conduct the suitable experiment to measure the energy
consumed by the given lamp load for a period of 15 minutes.
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Analyse the real and reactive power of a given single phase
circuit by conducting a suitable experiment.
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RLC
-Measurement
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Define voltage, current, power and power factor and measure
these quantities in series RLC circuit by conducting suitable experiment.
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Thursday, May 3, 2018
Wednesday, May 2, 2018
Saturday, April 28, 2018
Friday, April 27, 2018
Thursday, April 26, 2018
MUST READ QUESTIONS Reg 2013 – SSD
MUST READ QUESTIONS – SSD
UNIT-1
1.
Equations governing motor load dynamics
2. Steady state
stability
3. Multi
quadrant dynamics
4. Acceleration, deceleration, starting &
stopping (MODES OF OPERATION)
5. Typical load torque characteristics (5)
6. Selection
of motor (5)
7.
PROBLEMS
UNIT-5
1.
Transfer function for DC motor / load and
converter
2. Closed loop control with Current and speed
feedback–armature voltage control and field weakening mode
3. Design of current controllers
4. Converter
selection and characteristics (5)
UNIT-4
2. Margin angle control
3. Power factor control (5)
4. Permanent magnet synchronous motor (SINUSOIDAL& TRAPEZOIDAL)
5. PROBLEMS
UNIT-2
- Steady state analysis of the single converter fed separately excited DC motor Drive–continuous and discontinuous conduction
- Steady state analysis of the three phase converter fed separately excited DC motor Drive–continuous and discontinuous conduction
- Time ratio and current limit control (5)
- 4 quadrant operation of converter / chopper fed drive.
- PROBLEMS
UNIT-3
- Stator voltage control
- V/f control
- Constant air gap flux
- Voltage / current fed inverter – closed loop control
- PROBLEMS
Tuesday, April 24, 2018
Monday, April 23, 2018
Placement Preparation - AMCAT
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Sunday, April 22, 2018
MEMS - PIEZO SENSORS AND ACTUATORS QUESTION BANK
PART-A
ANSWER THE FOLLOWING
1.
What are the advantages of piezoresistive sensor?
2.
What is meant by piezo resistive sensor
3.
List piezoelectric materials?
4.
Define piezoelectric effect.
5.
Write the equation of piezo resistivity.
6.
Discuss about the materials that are used as piezoresistors
7.
List the applications of piezoresistive sensors.
8.
Discover the need of acoustic sensors.
9.
Describe PVDF
10. Why ZnO is used instead of PZT?
PART-B
ANSWER ALL THE QUESTIONS
1. Define Acoustic sensor. Examine the steps involved in fabrication
process of PZT piezoelectric Microphone
piezoelectric sensors
Comparison of the speed control methods of shunt/separately excited dc motor
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S. No.
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Basis of comparison
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Significance
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Armature resistance control
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Field control
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Ward Leonard Control
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|
1.
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Limit, range and hardness of speed
control
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Signifies
the ratio of speed with load
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The
speed in the range of zero or almost crawling to base speeds is possible. The
range of speed control depends on load.
|
Speeds
below base speed require field currents above the rated value. Hence it is
not employed for speeds below base speed.
|
An
elegant method for smooth variation of speed over a wide range. Speed reversal
is possible by reversing the generator field.
|
|
2.
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Smoothness of speed control
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Signifies
the number of steady speeds in the operating range.
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In
large drives speed control is obtained by varying the armature resistance
using contactors.
|
The
field circuit is low power one. The resistance in the field circuit can be
smoothly varied
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Speed
control is achieved by controlling the generator field. The smoothness with which the generator
field can be varied decides the smoothness of speed control.
|
|
3.
|
Economics of speed control
|
Decided
by the efficiency of the motor, maintenance and overall cost.
|
The
power loss in the armature resistance reduces the efficiency. The efficiency
is very poor, particularly at low speeds.
|
The
method is economical. The efficiency is not very much affected, because the
field losses decrease and rotational losses increases. The method is well
suited for constant power loads.
|
High
initial cost both for conventional and static. Efficiency is better than
armature resistance control.
|
|
4.
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Stability of operation
|
The
capacity of the drive to return to its original state or a state of new
operating conditions following a disturbance in speed or torque
|
The
stability is decided by the torque driven at given speed.
|
The
weak flux conditions in the machine are prone to increase degree of armature
reaction. The armature reaction may cause stability problems.
|
Stability
is very good at speeds below base speed. At higher sped he stability is a
matter of concern.
|
|
5.
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Direction of speed control
|
Signifies
the possibility of speed control below and above base speeds.
|
Only
speeds below base speed up to zero are possible.
|
Only
speeds above base speed are possible due to field rating.
|
Speed
variation below base speed by armature voltage control and above base speed
by field control.
|
|
6.
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Permissible load
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Signifies
Whether the machine is over loaded or under loaded in its speed range and
thus utilisation of the machine.
|
Suitable
for constant torque loads
|
Suitable
for constant power loads
|
Suitable
for both constant power & torque loads
|
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