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Frequently Asked Questions

Power Pool

The entity (either independent or the owner of transmission) that coordinates operations to maintain electric system stability and achieve least-cost dispatch by providing backup, short-term excess sales, reactive power support and spinning reserve; a power pool may also arrange transactions among generators and enforce rules of conduct for market activity

Seam

The interface between two control areas or ISOs

Transmission Reliability Margin

The transmission transfer capability that is required to ensure that interconnections are secure under a reasonable range of system conditions

Capacity Benefit Margin

The transmission transfer capability reserved by a load-serving entity that ensures access to generation from interconnected systems to meet generation reliability requirements and allows the load server to reduce its installed generation capacity below what may be otherwise necessary without interconnections to meet its generation reliability requirements

CRR

Congestion Revenue Right. See "Financial Transmission Right"

Dynamic Scheduling Service

The electronic services (metering, telemetering, computer software, hardware, communications, engineering and administration) that move a transmission customer's generation or demand out of the control area to which it is physically connected and into another area

Incremental Load

The portion of a generator's load that is in addition to its existing load

Load Forecasting

Planning by utilities to ensure a reliable electricity supply