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A characteristic of the transmission system produced by a constraint on the optimum economic operation of the power system, such that the marginal price of energy to serve the next increment of load, exclusive of losses, at different locations on the transmission system is unequal.
- Browse Related Terms: Capacity margin, congestion, Critical notices, Curtailable load, First Contingency Reliability Criteria, Independent system operator (ISO), Interruptible or nonfirm transportation, Intertie, Load-serving entity (LSE), Loop flow, Marginal electric generating unit, Native load, Operating reserves, Outage, Regional Transmission Organization (RTO), Transmission loading relief (TLR)
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