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Glossary

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EPA (Energy Policy Act of 1992)

FAQ
The legislation passed by the US Congress requiring electric utilities to provide access to their transmission and increasing wholesale competition in order to reduce the price of electricity for all customers

Plantwide Applicability Limits (PALs)

FAQ
Federal regulations that promulgate a single set of air emissions reduction targets instead of multiple targets for every emissions source within a plant

Island

FAQ
A component of a transmission system (or several systems) that becomes separated from its interconnection because of the disconnection or failure of elements within the system

Tieline

FAQ
A transmission line that connects two control areas or regions

POLR

FAQ
Provider of last resort

Contingency

FAQ
An unexpected failure or outage of a system that may include single or multiple components and may lead to simultaneous component outages

ISO

FAQ
The independent system operator that manages a region's transmission grid

Time of Use

FAQ
Charging customers for electric usage, based on the bloc of time (generally on-peak, mid-peak or off-peak) it is consumed