Electric-power transmission system is the system used for bulk transfer ofelectrical energy, from generating power plants to electrical substations located near demand centers. The different systems of transmission are:
- DC system
- Single phase AC system
- Two phase AC system
- Three phase AC system
The part of power system which distributes electric power for local use is known as Distribution System.
The different distribution systems are:
AC Distribution system
– Primary distribution system
– Secondary distribution system
DC Distribution system
– 2 wire DC system
– 3 wire DC system