In general, power plants generate electric power alternating current generated by the three-phase synchronous generator. The most high-voltage generator that can be generated by the power plant is 23 kV. At this time, the level of research being developed generators that can generate electric voltages up to 150 kV. Single line diagram of electrical power installations in power plants is shown in Figure I.13 simple in simple power plant
Description:
PMT / CB = Power Breaker (Circuit Breaker)
PMS / DS = Switch Separator (Diconnecting Switch)
Central power plants that are already in commercial operation in general is shown in Figure I.13. Electric voltage generated by the synchronous generator is increased by using an electric transformer before being connected to the rail (busbar) through the circuit breaker (PMT).
All electrical generator that produces electrical energy is connected to the rail (busbar). Similarly, all the channels out of the power station is connected to the center rail electric.
Channels out of the rail power plants used to send large amounts of electric power to the location of the user (load) and is used to provide power in locations around central power plant.
There was also a line (feeder) is used to provide electrical power for the purposes of their own plants which are used for electrical power source at installation of lighting, operate electric motors (electric motor as the driving cooling water pump, electric motor as the driving air conditioners, motors electricity as a driver of lifting equipment, completeness purposes of control, etc.).
At the power station also has electrical installation with electrical direct current voltage source. Direct current power source to the power plants used to drive mechanical equipment on the circuit breaker (PMT) and for emergency lighting. Direct current power source is used at the power station battery is a battery that is charged by the rectifier.