Subtransmission lines are power lines that typically operate at a voltage of 34,000 to 70,000 volts and are generally below 100 kV.

A phenomenon whereby a series of events ultimately results in a blackout after a certain amount of time ranging from seconds to minutes.

An annual forecast of the state’s peak electric demand (load) where there is a 10-percent chance that the actual system peak load will exceed the forecasted value in any given year or, stated another [..]

Affected utilities are those whose systems cause, contribute to or would experience an impact from a reliability issue.

Used to measure the synchronism between different alternating quantities, such as voltage or current. It is often an important performance measure; it is measured in degrees.

A baseload power plant is an electric generation plant that is expected to operate in most hours of the year.

A total loss of power over an area; usually caused by the failure of electrical equipment on the power system.

A substation design that offers advantages such as ensuring that the failure of any one circuit breaker will not interrupt power for more than a brief time. The designs also allow parts of the substat [..]

Abnormally low voltage that causes voltage-sensitive equipment such as computers, motors and certain types of lighting to have degraded or interrupted performance.

Also referred to as a “node” or a “station” or a “substation.” A common connection point for two or more electrical components, such as a transformer, a generator.