ASHUGANJ Power Station Company LTD

Abstract

The power sector in Bangladesh is going through numerous problems characterized by lack of supply capacity, frequent power cuts, unacceptable quality of supply, and poor financial and operational performance of the sector entities We did our internship at Ashuganj Power Station Company Ltd (APSCL) located at 90 km North-East of Dhaka on the left bank of the river Meghna from 26th of December to 11th of January and this internship report is the result of those 15 days attachment with the APSCL. During our internship period we gathered practical experiences over the topics related power generation switchgear protection and power distribution which we have learned inside the class room or from books. In this report we have focused on the processes which are used in APSCL. For power generation, steam and gas turbine power plants are used in APSCL. So we observed the process of power generation by steam and gas turbine power plant. During our internship period unit 1 and 4 of steam turbine power plant were under overhauling situation. So we had the opportunity to observe the inside part of the generator (rotor and stator) and turbine chamber which helped us to collect more knowledge about these topics. Protection and controlling of the equipments of the power station is a very important and complicated task. With the help of the plant engineers we observed the control room and protective equipments such as: relays (digital and electrical), circuit breakers etc very closely and understood the functions and controlling system of those equipments. Substation is an important part of a power station to distribute power and protection purpose. We acquired knowledge about various types of transformers, bus-bars, circuit breakers (SF6 and Oil), lightning arresters, CT, PT and other equipments of the substation which were clearly taught and shown by the senior engineers of the substation of APSCL. There we saw how the generated power is transformed by transformer and distributed. We observed the protection schemes taken to protect transmission lines and related equipment. Through our internship we have came to know how a power station runs. On the completion of our internship we can relate theoretical knowledge with practical experience.