A - F

The services necessary to effect a transfer of electricity between purchasing and selling entities that transmission providers must include in their open access transmission tariffs; IOSs are the voluntary services that transmission providers may offer to...

Pricing transmission based on the cost of each parallel path upon which the electric power flows

The ability of a customer to purchase power from a supplier at a rate agreed upon by both that is delivered to the customer's location (also called customer choice or retail competition)

The measure of time that a generating unit, transmission line or other facility is capable of providing service, whether the unit, line or facility is in service (expressed as a percent available for the time under consideration)

A link in a transmission system

A reduction in scheduled capacity or energy delivery

The measure of the transfer capability remaining in the physical transmission network for commercial activity beyond already committed uses

A right to transmit electricity over flowgates; a control area operator defines flowgate rights for links experiencing significant congestion and such rights may then be traded in bilateral markets

The trading of multi-hour blocs of electricity for delivery the next day (also called a forward market)

Costs of new transmission or generation (sometimes both) that electric utilities can "avoid" by purchasing from other sources, managing demand, conservation