Substation of Ashuganj Power Station Company Limited (APSCL)

Abstract

The power sector in Bangladesh faced 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. The generation of electricity is one of the most complex processes in the world. A lot of steps are needed to be completed to supply the power to the grid. In Bangladesh public and private sector produces 63% and 37% of electricity respectively. Public sector produces electricity through Bangladesh Power Development Board (BPDB), Ashuganj Power Station Company LTD (APSCL) and Electricity Generation Company of Bangladesh (EGCB). APSCL individually produces 15% of the total production. To fulfill the large demand of electric power in Bangladesh, the Ashuganj Power Station Company Ltd. (APSCL) plays a vital role in power generation being the second power station in Bangladesh. The APSCL produces 731 MW of electric power and supplies to the national grid. During our internship period we observed and gathered various knowledge and experiences over the topics which we have learned inside the class room or from books. In this report we have focused on the process which is used in APSCL for power generation, various equipments which are used for switchgear protection, power distribution system and substation. 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 are various types of tests (Megger test, CT test, Relay test) which are performed by the technicians and engineers of the APSCL. With the help of the engineers and technicians we observed these tests successfully during our internship period.