In general each generation plant in any power may have more than one generating units. Each of the unit may have identical or different capacities. A number of power plants can be tied together to supply the system load by means of interconnection of the generating stations.
Interconnected electric power system is more reliable and convenient to operate and also offers economical operating cost .
It has better regulations characters by all the units are interconnected.
In simply, The generation of power is transfer to the Consumers through the transmission system.
Generation unit , Transformer Unit, Converter Unit, Transmission Unit, Inverter Unit and Consumer Point. This combination of all the unit is called the overall power system units.