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University of Peradeniya

 
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Events organized by IEEE Peradeniya Chapter


(1) Workshop on “Modeling the simplified Sri Lankan power system network and study its        performance for different loading conditions”
       (Organized by IEEE Student branch of the University of Peradeniya together with        Electrical and Electronic Engineering Student society)

We are really happy to say that we have successfully completed the above workshop held on 13th July 2010 thanks to the enormous support of our lecturers, resource persons and IEEE. Thanks to this workshop students had a great opportunity to get hands on experience in one of the modern power system modeling tool.

At start Students were given refreshments to boost them up prior to start the workshop. Then the students were lead to the computing center. There we have facilitated the event for 60 students and all sixty of them were present at the workshop which gives clear evidence on our success of this event.
Initially Dr. A. Atputharajah gave a brief introduction on the importance of power system modeling and then he explained by showing how a simple power system model can be modeled using this software. Students practiced along with his instructions and successfully learned how to deploy a real system based on what they have learned in theory classes.

Then students were explained of how to do load flow analysis, fault level and transient stability studies to analyze the system performance for different loading conditions. This provided them more depth knowledge of the software as well as the operations of the system network under different operating conditions.
All the students were distributed a complete note on Sri Lankan distribution network where it contained an exercise to be followed on part of the Sri Lankan power system. This gave the students to work of there own for sometime and figure out there own problems which was really essential. Finally at the end all the students were given a valuable certificate to say that they have successfully completed the workshop. The total workshop carried out for 3hrs.

As a result of this workshop students gained a level of knowledge on modeling and analyzing the power system network. Therefore this expected to be enough for an active power engineering students to work more on these types of studies.

Memorable moments >>> Please click here to go to the gallery

(2)  Workshop on “Presentation on Power System Protection”
      (Organized by IEEE Student branch of the University of Peradeniya together with       Electrical and Electronic Engineering Student society)

The second workshop organized by the IEEE was the above one, held on 23th July 2010 at the seminar room one of the Faculty of Engineering, University of Peradeniya. Thanks to the immense dedication of the invited lecturer Mr A.P. Tennakoon- Chief Engineer(Protection, Hydro Power Division, Ceylon Electricity Board) and Dr. A Athputarajah, the workshop was a great success. Students were able to learn a lot about modern protection methods used in power systems and their practical aspects.

At start Students were given refreshments to boost them up prior to start the workshop. The total participation was more than fifty students, higher than we anticipated, clearly depicting our success in going to towards the students recognition. Then they were lead to the seminar room where the workshop was to be done. A printed note of the presentations were given to the students while a multimedia projector was used by the lecturer. The lecture consisted of the following,

Introduction

                Generator is the most important element of power system. Generators do experience short circuits and abnormal electrical conditions. In many cases, equipment damage due to these events can be reduced or prevented by proper generator protection.  Generators, unlike some other power system components, need to be protected not only from short circuits, but also from abnormal operating conditions. Examples of such abnormal conditions are over-load, over-excitation, over-voltage, and loss of field, unbalanced currents, reverse power, and abnormal frequency. When subjected to these conditions, damage or complete failure can occur within seconds, thus requiring automatic detection and tripping. All faults  associated  with  synchronous  generators  may  be classified  as  either  insulation  failures  or  abnormal  running conditions. An insulation failure in the stator winding will result in either an inter turn fault, a phase fault or a ground fault.
In these sorts of situations we need to detect faults or abnormal conditions and isolate faulty equipment and take remedial action so As to limit damage caused by fault energy and limit effect on rest of the system. There some major considerations when we apply protection to a generator, which are types of fault and abnormal conditions to be protected against, quantities available for measurement current, voltage, etc., types of protection available, fault position discrimination, dependability/reliability -tripping matrix, security – selection of the correct function, etc.

Generator Protection Functions

                This section simplifies protection against each type of fault or abnormal condition. Then suggestions are made for what is considered to be minimum protection as a baseline. After establishing the baseline, To detect the fault at its earliest possible stage. To give protection to the equipment against secondary damage. To avoid the equipment to run outside the capability specified.
Under this topic the speaker has mentioned about Generator Earthling, Generator differential (87G), Stator Ground Fault schemes, Stator winding faults, Earth Fault protection for ungrounded systems, phase-phase faults, High impedance grounding, Cylindrical rotor machine, inter-turn faults and protection, Pole slip Protection, Negative phase sequence, Stator ground fault 64S   injection principle, Short circuit characteristics, Stator /Rotor overload 49S/49R

Transformer Protection Functions

                This section simplifies the protection against the transformer breakdowns. Under this topic the speaker has mentioned about Grounding transformer, Transformer Differential protection (87T), Restricted earth fault function (87N), Over excitation (24), Transformer Tank Leakage Protection.

Case Studies

                The speaker didn’t forget give us some practical examples on each of the above scenarios. In doing so he has mentioned few case studies on Incorrect wiring, New laxapana Generator differential due to CT neutral disconnection, Inginiyagala generator –ve sequence due to line side earth fault, Victoria Transformer Differential due to Over Voltage-During system failure on 13-04-2008.

At the end, the conclusion of all the participants was that the workshop was a great success.

Memorable moments >>> Please click here to go to the gallery

(3)  Field Visit to Hela Dhanavi diesal power plant and Norochcholei thermal power plant

The third event organized by IEEE student branch, University of Peradeniya was a field visit to Hela Dhanavi diesel power plant and Norochcholei thermal power plant. The purpose of this event was to let the undergraduates get some experience on how these power plants work, maintained and monitored. The visit was scheduled on Saturday 24th July 2010. Thanks to the supportiveness  of Dr. A. Athputarajah, Dr. M.A.R.M Fernando, Dr. S.G.Abeyaratne and dedication of IEEE office bearers, we were able to get permission to visit these site which is something very rarely issued. Our special thanks goes to Chief Operation Officer,LTL Holding and Senior Project Manager, Puttalam Coal Power Plant, Ceylon Electricity Board for giving the permission for this visit and helping us to organize the event.

When selecting the participants for the visit, IEEE student members were given a priority. The rest vacancies were filled by first come first go basis where they were taken according to the order they mailed their information to our official email ieee.sb.uop@gmail.com. Almost all the expenses including vehicle fees, food expenses…etc were sponsored by IEEE student Branch. The total number of participants was forty four.

The students were asked to gather at the faculty main entrance before 5.00 a.m. the bus left the premises around 5.15.a.m. our first visit was to Hela Dhanavi diesel power plant. This has a capacity  of 100 MW. It has six 18V46 medium speed engines which use 180CST Grade furnace oil. The operatig company is Lakdhanavi Limited. It is directly connected to National Grid operated by CEB. The students were able to visit the interior of the power plant, control room, switch yard and storage tanks of the power plant. It was an unforgettable event where we were able to learn a lot about the industrial and technical aspects of these power plants while observing them with our own eyes.  Our special thanks goes to Eng. Gayan Kahandagamage who acted as our guide throughout the visit. The next  stop of our visit was the Norochcholai Coal Power Plant. This is a lead project of the government of Sri Lanka to enhance economic growth, poverty reduction and ensure balanced regional development through cost
effective power sector development. At the moment the first phase of the plant to generate 300MW is under construction.  First we were taken into a seminar room where engineering trainees of 2006 batch had a presentation prepared for us to give some idea about this power plant. The goal of this project is the construction of a 300 MW Coal Fired thermal power plant, with Infrastructure for a 900 MW power plant. The estimated output is 1658 Gwh of Annual Energy at distribution level for delivery to consumes.   The major constructions of the project are,

  • Building 4.2 km or 500 meter Jetty    
  • Boiler   
  • Steam Turbine   
  • Handling and Storage facility   
  • 220 kv transmission line covering 115 km to connect to Veyangoda existing Grid
  • Substation (connect to National Grid)

We were taken to visit all these sites while teaching us how they are constructed and how they will operate and maintained. It was a wonderful and very much educational moment to experience.  At the end of the visit, every one’s idea was that the visit is a great success.

Meomarable moments >>> Please click here to go to the gallery


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