GT and ST single line diagram

Before going into detail of electrical knowledge, the basic flow of this plant is necessary for us to study. The first drawing that we are exposed to is the single line diagram of Gas turbine generator and steam turbine generator.





For both gas turbine and steam turbine generator single line diagram, they are having the same concept of electrical flow. First the generated power is 10.5kV which will be stepped up to 275kV then send to national grid. At the same time, the generated voltage will then stepped down for the excitation system and the gas turbine control supply.



Later this single line diagram will be further connected to the switchgear drawing and switchyard connection.