Transmission--The movement of electric power/energy from some type of generation plant, over transmission lines. This then goes to distribution lines and ultimately to retail consumers.
Transmission Access -- Sometimes called wheeling. Allowing another utility company or retail customer access to the transmission line to send electricity from a generating plant to the utility and ultimately to a retail customer.
Two types of transmission access:
Wholesale--Movement of electricity between utility companies on transmission lines.
Retail--Retail customer may choose the supplier and electricity is moved over transmission and distribution lines.
Interconnection--Company transmission lines (maybe distribution) joined...