Available Power

available power

[ə′vāl·ə·bəl ′pau̇·ər]
The power which a linear source of energy is capable of delivering into its conjugate impedance.

Available Power


in an electric power system, the portion of the total system power that can be used by a dispatcher to meet the system’s loads (power demand). The amount of available power is defined as the total power of the system’s generators minus the power of the generators undergoing repair. Ordinarily, the available power is greater than the demand; the difference between the two values constitutes the reserve that is used to meet sudden load peaks.

In the normal operation of an electric power system, the available power must not be less than the demand at any given moment. If this condition is violated, a power deficit develops in the system that can lead to a lower quality of electric power in the form of a change in the frequency and voltage. In the most severe cases, damage may occur. A deficit can be met by using power supplied over power transmission lines from other systems. If the available power is to be utilized completely, the power transmission lines and the elements of the electrical network should have adequate transmission capability.


Lapitskii, V. I. Organizalsiia i planirovanie energetiki. Moscow, 1967.
Markovich, I. M. Rezhimy elektricheskikh sistem, 4th ed. Moscow, 1969.


References in periodicals archive ?
Oxxius is set on expanding further this product family by introducing new wavelengths, and increasing available power levels.
Overall efficiency with HD Radio in Hybrid Mode at -14dbc shall exceed 55% with available power output of at least 13 kilowatts.
But mild windy weather, high levels of electricity imports from the continent and greater than expected levels of available power plants meant the capacity margin was "adequate", and extra help to meet demand was not needed, the report said.
Those that have never actually driven a Volt are surprised at how much available power there is.
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New functionality and technology features found on both vehicles for 2015 include: available power fold-flat second- and third-row seats that enhance cargo convenience; approximately two inches greater legroom for second-row passengers, along with easier entry/exit; available eight-inch color touch screen radio with next-generation MyLink connectivity; up to six USB ports and six power outlets -- including a 230-volt three-prong outlet -- to support electronic devices of all kinds; available keyless entry and push-button start; available Magnetic Ride Control; advanced crash avoidance and driver assistance technologies; and also available rear-seat entertainment system with dual screens (Suburban only) and Blu-ray DVD player.
WHEN will Ed Davey and those other naively green politicians understand that all generators connected directly to the grid rotate at the same speed, and what determines how much of their available power each delivers, depends upon how hard it is driven.
We talked to Manitoba Power and they told us (because of contractual obligations) the first available power from them is the mid-2020s.
He also stressed for encouraging energy efficiency in new policy as Pakistan can increase available power by up to 20% by plugging leaks.
The upgrade nearly triples the amount of available power, raising the facility's total to 25 MVA of redundant utility capacity from Texas New Mexico Power (TNMP).
Its motor runs more quietly compared to other available power sources.
Total available power output stood at 9,646 MW, compared with 8,721 MW in 2011.