Total system generating capacity minus annual system peak demand, divided by the annual system peak demand, expressed as a percent.
The difference between net system capability and system maximum load requirements (peak load or peak demand).
The difference between the peak load and the portion of electric resources that are expected to be able to operate during the peak load of a utility or geographic area. Reserve margin is expressed in megawatts or the percentage by which the available portion of the resources exceeds the peak load.
The amount by which the utility's total electric power capacity exceeds maximum electric demand.
the amount of reserve capacity set by North American Electric Reliability Council (Nerc) regions that needs to be on the accounting books of an electricity utility. It has to have a certain specified amount of capacity above the utilityâ€(tm)s peak requirements, which are calculated using probabilistic models.
The amount of installed generation which exceeds the operating generation capacity needed to meet the expected peak load of a given utility with a defined statistical probability. Standards vary from utility to utility, but most utility planners consider a 15-20 percent reserve margin essential for good reliability.
The amount of unused capacity or idle capacity that a utility has at the period of peak demand.
The amount of unused but available generating capacity that can be applied to an electricity system within both 10 minutes and 30 minutes at peak load, expressed as a percentage of total system capability.
The amount of unused available capability of an electric power system at peak load for a utility system as a percentage of total capability.