Thursday, June 25, 2009

The Hot final year projects for Electrical engineering given to us

Here is the list

1. Synchronizing and Protection relay for net metering applications of Solar Panels.
Eng. WDAS Wijayapala Dr. J.P. Karunadasa
Description
Electricity Authorities of Sri Lanka have allowed net metering of electricity and under this
scheme electricity users are allowed to generate electricity using renewable resources and supply
to the grid. Their monthly electricity bill will be the net of the usage and what is supplied
through generation. If they have supplied extra electricity to the grid, they can use them later.
Design and production of a synchronizing relay with protection features required for
interconnecting solar panels is the objective of this project.


3. Improvement of reliability of micro hydro electricity generation plants with special
emphasis on analyzing the causes for the failure of capacitors, proposing remedial action
and implementing the proposal in a micro-hydro facility.
Eng. J. Karunanayake and Dr. Udayanga Hemapala
DESCRIPTION
It is the accepted practice in Sri Lanka and elsewhere in the world to use induction generators for
electricity generation in micro hydro plants. Basically the induction generator comprise of a
squirrel cage induction motor with its excitation provided through capacitors. These generators
can be single phase as well as three phase units. Micro hydro plants generally have no governor
control due to economic reasons and generation/demand balance is achieved by activating a
dummy load through a device known as Induction Generator Controller (IGC), a power
electronic device.
Micro hydro developers have been experiencing explosion/burning of the capacitors frequently
and such failures not only lowers the reliability but increases operational costs as well. At times,
these failures have even lead to major fires causing extensive damages to the installation. There
are more than 300 micro-hydro plants in Sri Lanka and this problem is common to most of the
stations, if not for all.
With the studies carried out under this project it is proposed to
1. Ascertain the reasons for the failure of the capacitors
Propose suitable measures to overcome such shortcomings
2.
3. Implement the proposed solution in a micro-hydro facility
4. Observe the performance and prove that the cause/s for the failure have been overcome
5. Propose any other efficiency/reliability improvements or cost saving measures
6. Prepare a cost benefit analysis on the improvements proposed
University will arrange a micro-hydro facility to collect all necessary information, carry out all
necessary measurements and to try out the solution.

6. Three-phase full-parameter AC electricity acquisition module.
Dr. Chandima Pathirana
This project aims to propose a module which can to provide the following
parameters in relation with the three phase electricity.
The true effective value of current and voltage, power factor, active power,
reactive power, frequency, input active electrical degree, output active electrical degree,
main electrical degree, reactive electrical degree, apparent power, main apparent power
are the parameters .


8. To design and build a “Power System Simulator”
Eng. J. Karunanayake and Prof. Lucus
DESCRIPTION
The “Power System Simulator” is basically a model of a real life power system. It comprise of
generators, generator transformers, transmission lines, grid substations, distribution lines,
inductors, capacitors, circuit breakers, current transformers, voltage transformers, protection
relays and metering facilities. Such a model power system will be extremely useful to understand
the behaviour of the power system or individual components under all conditions, whether
abnormal or normal. A brief description of each of the above items to be used in the model is
given below:
GENERATORS
Generators will be synchronous generators driven by prime movers, which can be induction or
DC motors. Prime mover. In case of induction motors variable speed drives could be used to
vary the speed. Voltage regulation will be both manual and automatic.
GENERATOR TRANSFORMERS
Output of the generators will be connected to the busbars through the generator transformers.
Generator transformer usually will step up the generating voltages to a higher voltage for
transmission. However in the model, the transmission voltage will be of 110 Volts to ensure
safety.
TRANSMISSION LINES
Transmission lines will be modeled using inductors, resistors and capacitors. Typical
transmission line parameters will be used. Facilities will be made available to create different
kinds of faults on the line at different places.
GRID SUBSTATIONS
Typically GSS will comprise of two stepping down transformers and MV feeders.
CIRCUIT BREAKERS, PROTECTION RELAYS, CTS AND PTS
Air circuit breakers will be used as circuit breakers. Protection relays to be used will be distance
relays, OCEF relays and possibly transformer differential and generator protection relays of
reputed manufacturers. These will be fed from the CTs and PTs through test plugs. Protection
relays available in the lab could be used in the model.
USER INTERFACE
All protection relays will be connected using a communication cable or otherwise to download
all information stored in the relays from one port. These will include all current/voltage
waveforms, relay operation records, CB opening/closing information etc. Facility will be
available to download the information from relays individually as well. In addition remote
closing/opening of circuit breakers will be facilitated using the same.
METHOD PROPOSED
Step 1
Preliminary Planning of the system to be modeled,
- Whether the model should have all facilities as proposed above or less or more.
- Plan out the project, decide on the stages/modules and timings
- Identify the problems that may encounter, space, funds, material, workman inputs
Step 2
Model the proposed system with PSCAD or any other software
- ascertain the typical values for various impedances, generator/transformer ratings, loads
etc.
- carryout a fault study ( symmetrical and unsymmetrical) and a load flow study
- analyze whether currents and voltages will be sufficient to operate the protection relays
- determine the appropriate component values, KVA ratings for the generators,
transformers etc.
Step 3
- Identify the components/items to be procured
Step 4
Carry out the final design
- Determine the physical dimensions of the model
- Decide on the items required other than the electrical components for building the model.
- Prepare the wiring diagrams
- Prepare a cost estimate
Step 5
Building the Model
- Construction and installation
- Wiring checks
- Commissioning tests

12. Development of a synchronized energy monitoring device for energy theft detection.
Dr. Narendra
Co-supervisor: Mrs. Upuli Jayatunga
13. Development of a high impedance fault detection system in low voltage distribution
system.
Dr. Narendra
Co-supervisor: Mrs. Upuli Jayatunga


These are the hottest ever and i wish with all my luck to be get one of these.

Monday, June 22, 2009

Download accelerator for linux comparison with windows software


what is the best download accelerator for linux?

I was addicted to IDM when i used Windows, but having switched to linux i tried my best to find a accelerator which matches IDM.

The result:

IDM:~60KBps in my ADSL link of 64KBps. 60/64 being the used maximum bandwidth.


Linux: (Prozilla) 51KBps. efficiency 51/64 .

Prozilla and IDM both use the same technologies and download the same file by partitioning it.
(lots of parallel connections of different parts of the file (frm different servers))


So, as far as download accelerators are concerned linux is still far behind.

But download managers are in par with windows.

Ofcourse this is not due to the operating system but due to lack of supportive software. from my experience Linux is far far ahead of windows as a operating system.

So we can expect the FOSS community to come up with a excellent download accelerator in the years to come.

Angam pora

frm http://martial-arts-asia.blogspot.com
Friday, May 15, 2009
Introduction to Adithada
When people talk about kickboxing it is always about Muay Thai, some do speak of MMA and some Bokarto, even I was in a shocked when there is a request for me to write about Adithada as this is consider as type of martial art that not much people know about.

It was actually my honour to be able to share a bit about Adithada and a big thanks to the data research team. Adithada is a type of Martial Art that was founded approximately 2000 years ago according to sources, we believed that this form of martial art have a certain influence to the art of kickboxing.

This art was founded in the southern part of India and considered as a preliminary practice or the empty hand of southern Kalari Payat practice. Adithada allowsthe Martial Artist to prepare themselves in years of training before they start training with weapons in Southern Kalari Payat School / Style.

Like most of the martial art, The name of Adithada actually represents the whole essence in it’s martial art, Adi (Hitting) and Thada (Blocking) describes the whole meaning of this martial art itself. Adithada is largely practices in Southern Kerala and Northern Sri Lanka. And this martial art’s main focus is on Grappling, Striking and Pressure Points.

The practitioner uses their Fist, Legs, Knees, Elbow and Forehead in the practices, and it sound quite similar to Bokarto’s style or Martial Art, and since this martial art was founded so long ago, there is no trace back to it’s original founder, for those who have more detail in this art, please do contact us.

Image taken from: martialartslibrary.net


comment: never heard of this martial art , but v have an ancient martial art called angam pora, which emphasis on strikes to nerve centers.

Management Subjects for level 3

I had to upload these as a number of my juniors asked for them.

The first rar file contains Industrial Management and Marketing MN305 , lecture notes and presentations

while

the second rar file contains

Business Economic and Financial Accounting MN304, lecture notes and presentations.

These are for University Of Moratuwa Faculty of Engineering Level 3 subjects.

Monday, June 1, 2009

Linux is the future

Here is the power point presentation i made about linux to present to my co workers when i worked as an intern at data acquisition and design private Limited.

It was requested by the general manager and presented to all the co workers and CEO.

link:http://cid-1ac875ccee94871a.skydrive.live.com/self.aspx/.Public/Linux.ppt


I presented it in a laptop running kubuntu with KDE 4.1 (great effects) , but the irony is that i created using MS power point rather the open office. Or did I?

It shows the basic differences between linux and windows and their advantages and disadvantages.