Thesis 2011
Browse
34 results
Search Results
Item Report on Substation Equipment Production at Energypac Engineering Ltd.(East West University, 2011-08-16) Khan, Md. ShamimElectricity is considered obligatory all over place since invention. Modem life is impossible without proper supply of electricity. Even, it is called the prime mover of a state. Bangladesh is a developing country and it is facing power crisis. Only 4 8 % of the total population has a kind of access to electricity. To ensure the electricity supply to all, the government has taken various short term and long term project. Energypac Engineering one of the best power engineering companies not only in Bangladesh but also in South-Asia is contributing to the country by serving different products & related to substation. Being a local company it also helps our country to save currency. The report is about my industrial attachment at the factory of "''''''t'n.l1r\''ro Engineering situated at Baruipara, Savar, Dhaka. factory is divided into different sections but all sections work mutually. from the transformer core cutting, core making, coil winding, core coil assembl ing, in process testing, and tanking, all the process related to transformer manufacturing is done under the transformer section at the factory. The high lab is used for different routine and type test of transformer. Both indoor and outdoor type current and potential transformer is manufactured at the instrumental transformer section. Different switchgear components L T switchgear, switchgear, panel, VCB, LBS, input & output control panel are assembled at switchgear section of the factory. Different types of i solator and switches are also manufactured at isolator and breaker section. fabrication section helps to fabricate different parts of different products. Besides, the factory has its own paint and coating section for liquid painting, powder coating, and nickel coating over different products. The factory update CNC section and machine shops too. All these sections and facilities at the factory of Energypac Engineering help Energypac to achieve their products a new standard. M y industrial attachment at ' Energypac Engineering Ltd' was really a great opportunity for me to compare my theoretical knowledge with practical experience. With the help of the honorable officials and m y hard work I have successfully completed m y internship. I am really grateful to almighty Allah.Item Design, Construction and Analysis of a Single Phase Inverter(East West University, 2011-05-14) Khan, M. Saddam Hossain; Islam, Mashfique; Rahman, Md. IstianaturA signal phase inverter is designed and constructed to provide regulated output voltage at 220v. The output power stage is designed in two methods first one is using four power transformer in H-bridge mode to the load through a transformer, and another one is two NMOS power transistors coupled to the load through a transformer. The output is a 50Hz square wave which is obtained by totem-pole driver operation of two transistors using 50 Hz complementary trigger pulse stream for first method. And for the second method 50Hz square wave is obtained using a single PNP transistor. The inverter is constructed and presented. The circuit is tested and it is found that the waveforms obtained at different stages of the circuit conform well to those obtained by computer simulation. The inverter circuit is found to be efficient for applications in appliances.Item Report on Business Process Re-Engineering Documentation at Grameenphone Ltd.(East West University, 2011-04-15) Rahman, FahmidaIt was a great opportunity to work under the largesttele communication company of B ang lade sh. The main purpose of the program was to perceive there all life situation. The academic knowledge is not well enough to complete with re al world. This internship prog ram was helpful to face the re al working environment. Being the large stellular phone company in the country, Grameenphone has to have a gigantic number of employees and a huge number of employee s and a huge number of customers as well This internship report contains all the information about my work experience with Grameenphone Ltd, which got its cellular license in Bangladesh at 28th November 1996 by the Ministry of Posts and Tele communications, the company launched its service on the Independence Day of Bangladeshat 26th march 1997. I n GP I have spent a good time in learning and was rewarded for my be efforts, learnt to de al with different situations, had experience of corporate working environment which affects an employee performance and attitude towards work , had good time in learning and performing. I would like to say that it will be one of my best skills that would re main with me and help me in future which will offer many challenge s. I would like to highlight this that my experience with Grameenphone Ltd. was very memory able and full of learning' s where J found a lot of changes in my attitude, learning and be Havier . In or der to achieve the major improvements BPR is seeking for, the change of structural organizational variables, and other ways of managing and perfuming work is often considered as being insufficient. For being able to reap the achievable benefits fully, the use of intonation technology (IT) is conceived as a major contributing factor. While IT traditionally has been used for supporting the existing business functions, i.e . it was use d for increasing organizationalItem Report on Polli Bidyut Samity-1(East West University, 2011-04-13) Hossain, Md. KhalidRural Electrification Board (REB) is the pioneer in providing electricity for thousands of villages in Bangladesh. Palti Bidyut Samity's are the co-operative societies of REB which are actually taking the responsibilities of distribution of power. There are total seventy Palli Bidyut Samity under REB and Pall.i Bidyut Samity-l is one them. I have completed my internship in Palli Bidyut Samity-1. I started my internship on 30th August, 2010 in Palli Bidyut Samity-l.The duration of this internship was three months (two days a week). During my internship period I visited all the departments of Palli Bidyut Samity-I, their distribution substation (Nobinogor, Savar) and grid substation (Hamannogor, Savar). I also got the opportunity to visit two power plants which generates electricity for PBS-I; these are, Summit Power Limited (Ashulia, Savar) and United Power Generation and distribution Company Limited (EPZ, Savar).Item Design and Analysis of the Reduction of Harmonics at Inverter Output(East West University, 2011-04-15) Habib, Md. Zakaria; Alim, lobair Ibna Abdul; Khan, Imrul HasanThe aim of this thesis is to present a technique to reduce harmonics in output voltage of singll phase inverters. The thesis explains how harmonics is one of the most dangerous threats for the, appliances. The thesis also deals with the technique to reduce harmonics. A circuit based paralleling of two invertors by using interface reactors is investigated. The interface reactor is thls harmonic reducing element. Sine Pulse-width modulation is used to generate the gating signal: of the inverters. There is a phase difference between the gating signals of parallel branches. By varying the phase difference, an analysis is done to find the best situation when maximum harmonic elements can be reduced. Another two analyses are done by varying frequency ratio and modification index. A conclusion is made about the finest modulation index depending 01 BMS value of fundamental component and presence of 3rd, 5th th harmonic components between frequency ratio and specific harmonic components is also studied. It is possible, eliminate all harmonics up to a certain limit by setting the frequency ratio. An equation i: elimited for that. Analysis is carried out by using MA TLAB and PSPICE software.Item Report on MAHTAB Flexible Printing Press(East West University, 2011-04-15) Nipa, FahriaElectricity is the driving force of modem civilization as well as the backbone of all development activities of the country as a whole. But the present generation capacity of the country is not sufficient enough to meet the prevailing load demand of the country and causes hindrance to the development activities in industrial, commercial, agricultural and social sectors. Mahtab Flexible Printing Press is a factory of good quality printing and packaging. They have very good reputation in printing industries. Their all proj ects are very big . things which I could not learn from book. This report is written on the basic used equipments in industry. distribution, safety of machines, use of inverter, cooling tower, chiller, compressor and etc . Inverter, we learn very few things about inverter from book but I got many new application of inverter from my training. When I worked in Mahtab Flexible Printing Press I also got the opportunity to see the entire task of making their product, maintenances and use of so many new electrical equipments. I completed all of the work successfullyItem Report on Regional Operation and Maintenance (ROM)(East West University, 2011-04-15) Khan, MuntasirTo fulfill the requirements to be a RSc Engineer from East West University, r have chosen the Industrial attachment or internee. I did my internship at Grameenphone Ltd. My internship title is "Regional operation and maintenance". My major area is Telecommunication. So as a Telecom Engineer Regional operation and maintenance under technology division of Grameenphone is related to my field. This report is written on the basis of technology division of Grameenphone. Here, I described about the regional operation and maintenance (ROM) of Grameenphone. Grameenphone has been successful to build a superior image in comparison to the other operators. In other words, GP has a clear advantage over the competitors. Grameenphone has some additional features in comparison to its competitors. It is playing a vital role to increase the subscribers of Grameenphone. Another important thing is that GP users are mostly satisfied with the initial price of GP connections and handsets. Because, before GP's introduction to the market, mobile phones were totally out of reach to the major part of the current market. Moreover, Grameenphone subscribers are happy with the country wide network. At Grameenphone I have gathered practical knowledge about BTS, also called 'site' in Grameenphone. I was attached with "Regional operation and maintenance (ROM) department under ''Technology'' division in Grameenphone. There I was attached with Dhaka west team. The Dhaka west team cover Dhanmondi, Mohammadpur, Shamoli, Mirpur, Savar area. With the Dhaka west team I visisted almost 50-60 site and get a knowledge about BTS. Specially the site was visited by the field operation engineers (FO) . The field operation engineers specially visit the site to maintain the BTS fault free. So, visiting the site r got a hand to hand experience about GSM antenna, RBS, rectifier, radio link and how they maintain the strong network connection of Grameenphone. To be a part of a Grameenphone I got a small experience about corporate life .. After all r want to say to be student of EEE,r am very much lucky to have a technical knowledge from a leading telecom company in Bangladesh.Item Transformer Marking and Switchgear Assembling at Energypac Engineering Ltd.(East West University, 2011-05-22) Rahman, Md. Abdur; Shohidullah, Khondokar Shah MdI did our internship at Energypac Engineering Ltd. Savar Barurapara from 1st January. So as a Power Engineer Substations Equipments are related to our field. It Energypac we have gathered practical knowledge about Power transformer, Distribution transformer, Instrument transformer. In report we have focused on various types of machines which are being used to manufactured the transformer and Switchgear.Item Report on Power Grid Company of Bangladesh(East West University, 2011-04-28) Neela, Tania Tahmid; Mohammad, NurPower Grid Company of Bangladesh (pGCB) is created under the restructuring process of Power Sector in Bangladesh. This report is based on our internship work in Power Grid Company of Bangladesh at Manik Nagar branch. A power system has three basic segments, i.e. power generation, power transmission and power distribution. Basically Power Grid Company of Bangladesh deals with transmission part only. It primarily focuses on different processes of power transmission in power grid. We were introduced with various equipment of Power Grid, such as Relay, Circuit Breaker, Power transformer, Bus bars, Disconnector, Wave trap, Cable, DC battery. We worked at PGCB as intern for 80 hours. Each day our activities were divided into three parts. yustly our supervisor talked to us about the theory behind our day topic. Then we visited the grid with our supervisor to relate theory with practical implementation. Finally we visited the grid again to gather ourselves information about the equipment of that day. Here we learned about power transmission and the behavior of various equipment used in grids. This report contains a detail description about some of these equipments. As we did not complete any major course related to power prior to doing the internship, we had to face hurdles. It would be beneficial and better for us if we had completed the courses Switchgear, Power Station and Power Electronics.Item An Overview of DESCO’s Distribution, Operation, Maintenance and Customer Care(East West University, 1/29/2012) Sayeed, Md. Sohab; Chowdhury, Abdullah Al MaymunElectricity is the ultimate tool for modernization. It created it, sustains and will hence propel its borders past present limitations. Proper supply of electricity has a positive impact on GDP of a country. In Bangladesh, there is always a deficit of electricity production. At the moment, only 60% of our entire popUlations are getting electricity. People, who are getting electric lines, are also facing a great deal of load shedding. After the liberation war, every government tried to improve power sectors but the struggle with meeting the demands of the electrical consumption still persists. The most pressing problem in the power sector has been with the distribution system, which is characterized by heavy system loss and poor collection perfonnance. Dhaka Electric Supply Company Ltd. (DESCO) was created in 1996 under company Act 1994 as a public Limited company to improve better revenue collection and better consumer service.