Er.Amit Chaurasiya studies at Azad Technical Campus Lucknow.All slide make very clear and easily understood suitable for Electrical Engineering students. I hope you will easily understand.
Er.Amit Chaurasiya studies at Azad Technical Campus Lucknow.All slide make very clear and easily understood suitable for Electrical Engineering students. I hope you will easily understand.
Load Frequency Control of Two Area SystemManash Deka
This is a synopsis presentation on a project of designing and analyzing Load Frequency Control (LFC) of a two area system. This is useful for students, basically of Electrical Engineering branch. This project will be simulated in simulink of MATLAB.
Nowadays, it is very important to maintain voltage level. Controlling of that voltage is also important. This Presentation contains methods of voltage control.
Permanent Magnet Synchronous motor (PMSM) or Permanent Magnet AC motor:
Introduction to PMSM motor.
Types of PMSM Motor.
Mathematical modelling of PMSM motor.
Advantages and dis Advantages of PMSM motor
Basics of electric traction system .
Covering technologies used and their use in Indian railway.
Types of traction systems.
Working basics of various types.
Historical analysis to some extent.
Load Frequency Control of Two Area SystemManash Deka
This is a synopsis presentation on a project of designing and analyzing Load Frequency Control (LFC) of a two area system. This is useful for students, basically of Electrical Engineering branch. This project will be simulated in simulink of MATLAB.
Nowadays, it is very important to maintain voltage level. Controlling of that voltage is also important. This Presentation contains methods of voltage control.
Permanent Magnet Synchronous motor (PMSM) or Permanent Magnet AC motor:
Introduction to PMSM motor.
Types of PMSM Motor.
Mathematical modelling of PMSM motor.
Advantages and dis Advantages of PMSM motor
Basics of electric traction system .
Covering technologies used and their use in Indian railway.
Types of traction systems.
Working basics of various types.
Historical analysis to some extent.
On load tap changer in a.c. locomotive transformer & air blast circuit b...vishalgohel12195
On load tap changer In A.C. locomotive transformer & Air blast circuit breaker
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Block diagram of A.C. Locomotive
Equipment of locomotive & their function
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LCL Filter for Grid Connected VSC Converter
Comprehensive analysis and modeling of the three-phase LCL filter for VSC converters, suitable for wind energy or photovoltaic applications.
Performance of Six-Pulse Line-Commutated Converter in DC Motor Drive ApplicationZunAib Ali
This paper presents the speed control of DC motor using six pulse controlled rectifier. The
conventional Proportional Integral (PI) control is used for firing angle control. The armature current is fed
back and compared with reference current representing desired speed values. The proposed system is
simulated using SimPowerSystem and Control System Matlab toolbox. The time domain plot of reference
and actual armature current are shown in results section. The results are satisfactory with deleterious effect
on input current. The frequency plot of input current is provided to show the harmonic contents, generated
as a result of control operation.
Sinusoidal PWM and Space Vector Modulation For Two Level Voltage Source Conve...ZunAib Ali
Complete detail of Sinusoidal PWM and Space Vector Modulation For Two Level Voltage Source Converter
Space Vector Modulation includes:
Switching states, space vector, space vector diagram, space vector and switching states relationship, Dwell time, switching sequence
A complete description of including circuit diagram, gain equation, features of Instrumentational amplifier , its working principle, applications, practical circuits, Proteus simulation and conclusion.
Uet, Peshawar Pakistan
Batch-06
Concept of energy transmission & distribution ZunAib Ali
Downlaod is NOW Allowed (08/06/2016)
for more help: email me at zunaib_91@yahoo.com
Purpose of Electrical Transmission System
Main Parts of Power System
One-Line Diagram of Generating Station
Main Parts of Generating Station
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This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
2. Introduction-
Traction
Driving forward of vehicle is called Traction and the system,
which employs this type of mechanism is called Traction
system.
classified broadly into two groups namely:
(1)non-Electric traction systems
(2)Electric traction systems
3. Electric Traction-
The system which use electrical power for traction system i.e.
for railways, trams, trolleys, etc. is called electrical traction.
OR
Electric traction means a locomotion in which the driving
force is obtained from electric motors.
Electric traction will continue to play a dominant role in the
Railway since it is an environmentally clean technology
compared to diesel traction and also its running cost is low.
There are many advantages of electric traction over other
forms of locomotion.
4. Ideal Traction System
(i) Maximum tractive effort should be exerted at
starting in order to have rapid acceleration.
(ii) Equipment should be capable of overloads for short
periods
(iii) The wear caused on the track should be minimum
(iv) Braking should be possible without excessive wear
on the brush
(v) Capability of withstanding voltage fluctuations and
temporary interruption of supply.
(vi) Parallel running usually more than one motor (two or
four motors ) should be possible.
5. Advantages of Electric Traction
Cheapness. It is cheapest method of all other methods of traction.
Cleanliness. It is free from smoke and flue gasses
Maintenance cost. Maintenance and repair cost is about 50% of
steam traction system.
Starting time. It can be started without loss of time.
High starting torque. This system uses of d.c. & a.c. series
motors, which has a very high starting torque.
Braking. In electric traction , regenerative breaking is used which
feeds back 40%of the energy.
Saving in high grade coal. No coal is required for electric traction.
6. Disadvantages of Electric Traction
(i) High initial expenditure
(ii) Failure of supply is a problem
(iii) Electrically operated vehicles have to move
only on electrified track
(iv) For braking & control, additional equipments
required
(v) Interference with telegraphs and telephone
lines.
7. System Of Track Electrification
(i) D.C. Systems
(ii) A.C. Systems
(a) Three phase A.C. system
(b) Single phase standard frequency system
(c) Single phase low frequency system
(d) Single phase to three phase system [Kondo
system]
e.g 600V dc is given to tramways and trolley buses.
8. Track System Classification
In general following electric traction systems exist :
• AC 3 phase 3.7 kV system
• AC single phase 15/16 kV -161/25 Hz
• AC single phase 20/25 kV - 50/60 Hz
• DC 600 V
• DC 1200 V
• DC 1.5 kV
• DC 3 kV.
9. Advantages & Disadvantages of A.C. System Over
D.C. System
Advantages
1. Light overhead catenary
2. Saving in sub-stations
3. More flexibility
4. Lesser equipment used & easy to maintain
5. Starting efficiency
6. Cheap as far as cost for fixed installation
Disadvantages
1. Single-phase A.C. system imposes Unbalancing effect
2. Produces interference with telecommunication lines
12. Auxiliary Equipment
Catenary - This is the overhead wire of special cross-section.
Pantograph - This is a device used for collecting current from the
catenary i.e. the over head lines.
13. Auxiliary Equipment Cont…
Circuit Breakers - The function of circuit breaker is to disconnect the
engine from the line side in case of some fault
On Load Tap Changer - On load tap changer is used for varying the
output voltage for controlling the speed of motor
Transformer - A tap changing transformer is installed in the locomotive
for stepping down the voltage according to the requirement of
traction motors
Rectifiers - Semiconductor rectifiers are used for conversion of A.C
power into D.C power
Smoothing Reactors - Any ripples found on the output side of the
rectifier are eliminated by the smoothing reactor fitted after the
rectifier.
14. Independent Control- SEPEX
Short form of SEParate EXcitement of traction motors where
the armature and field coils of an electric motor are fed
with independently controlled current.
This has been made much more useful since the introduction
of thyristor control where motor control can be much
more precise.
15. Thyristor Control
Schematic of AC Electric Locomotive Power System with
Thyristor Control and Separately Excited DC Motors
18. Parallel Motors - DC Resistance Control
Schematic of Simple DC Traction Motor Power Control Circuit
19. DC Traction Motor
It consists of two parts, a rotating armature and a fixed field.
• The fixed field consists of tightly wound coils of wire fitted
inside the motor case
• The armature is another set of coils wound round a central
shaft.
• The armature is connected to the field through "brushes"
which are spring loaded contacts pressing against an extension
of the armature called the commutator.
20. The DC Traction Motor: How it Drives the
Axle
How a DC motor drives the axle through a pinion and
gearwheel
21. AC Motor Traction
Schematic of Single Phase AC Supply Powering 3-Phase AC
Motors
AC Locomotives with AC Drive
22. AC Motor Traction
Schematic of AC locomotive with Tap Changer Control of
Transformer Output
AC Locomotives with DC Drives
23. Braking Characteristics
If any electric motor is to be stopped, electric supply to it is
disconnected.
In this way, the motor shall take long time to stop, as the
motor shall continue to rotate due to inertia.
Some braking system must be used so that it stops within the
pre-determined short time.
A good braking system must posses the following features
(i) It should be fast and reliable.
(ii) The braking force must be capable of being controlled
(iii) Kinetic energy of the rotating parts of the motor and its
driven machine must be suitably dissipated & suitable
means must be provided.
24. Advantages & Disadvantages of Electric Braking
Advantages
(i) It is quite fast
(ii) It is quite cheap as far as maintenance part
(iii) Higher speed can be maintained
(iv) Heat produced during braking is not harmful
(v) It is free from fires and is smoother
Disadvantages
(i) It can stop the motor but it cannot hold it
stationary.
(ii) It cannot be applied to all motors
(iii) Its initial cost is very high.
25. Types Of Electric Braking
Dynamic Braking: where the motors become generators
and feed the resulting current back.
It classified into three categories:
1. Plugging
2. Rheostatic Braking
3. Regenerative Braking
PLUGGING: Generally plugging is applied by changing the
phase sequence of the three phase induction and
synchronous motor
26. Rheostatic Braking
• The motors become generators and feed the resulting
current into an on-board resistance.
• When the driver calls for brake, the power circuit
connections to the motors are changed from their power
configuration to a brake configuration and the resistors
inserted into the motor circuit. As the motor generated
energy is dispersed in the resistors and the train speed
slows.
27. Regenerative Braking
• The motors become generators and feed the resulting
current back into the supply system
• A train could use its motors to act as generators and that
this would provide some braking effect if a suitable way
could be found to dispose of the energy.
• Trains were designed therefore, which could return
current, generated during braking, to the supply system
for use by other trains.
28. Conclusion
•No single motor is ideal for traction purposes. But; DC
Series Motors are most suitable for this work
•Power Electronics have been resorted to in a major way as in
case of thyristor control.
•Different types of braking for the traction system was
studied.