A STUDY ON CONSTRUCTION MANAGEMENT OF DIFFERENT SUB-STATIONS IN BANGLADESH WITH SPECIAL FOCUS ON 132/33KV SUBSTATIONS AT KERANIGANJ AND BARGUNA

Abstract

At present, the demand for electrical power is growing rapidly, and this can be fulfilled by the power generating substations. There are different types of power generating substations like thermal, atomic, and hydro-electric. Based on the availability of different resources, substations are building at different locations, but these locations may not be closer to load centers. The actual power utilization can be done by the load center. So it is essential to transmit the power from the substation to load center locations. So, high and long transmission networks are required for this function. Power is generated fairly in the level of low voltage level; however, it is inexpensive to supply the power at a high-voltage level. For preserving high and low voltage levels a number of switching as well as transformation stations have to be produced among the generating place & customer ends. Generally, these two stations are named as electrical substations. A substation is an electrical system with high-voltage capacity and can be used to control the apparatus, generators, electrical circuits, etc. The Substations are mainly used to convert AC (alternating current) to DC (direct current). Some types of substations are tiny in size with an inbuilt transformer as well as related switches. Other types of substations are very huge with different types of transformers, equipment, circuit breakers, and switches. The different types of substations mainly include Step-up Type Substation, Step-down Transformer, Distribution, Underground Distribution, Switch yard, Customer Substation, and System Station