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specific power of wind turbines
Rated power of generator (W) / rotor swept area (m2).
The difference between the total available capacity of all fossil fuelled power generators already coupled to the power system and their actual loading.
A party wishing to develop and finance (with equity) a project. Shareholders of project companies are known as sponsors.
The market for buying and selling a specific commodity, foreign currency, or asset at the prevailing price for immediate delivery.
The current market price of the actual physical commodity. Also called the cash price.
Small Power Producer
For ensemble prediction the spread between the ensemble members gives a hint to the skill (accuracy) of the prediction. At higher spreads a larger forecast error is more likely.
special purpose vehicle
Shuttle Radar Topography Mission
Stability of a power system refers to the abilitiy to continue intact operation following a disturbance.
An equilibrium state reached in a solar thermal collector (energy captured equals energy lost) during periods of continuous high solar irradiation without consumption
The solar thermal collector temperature at which stagnation occurs
Description of the aerodynamical effect that the air stream around an airfoil (e.g. rotor blade) breaks away and which results in a reduction of the lift coefficient
Power limitation method in a wind turbine. Stalling works by increasing the angle at which the relative wind strikes the blades (angle of attack), and it reduces the induced drag (drag associated with lift). Stall controlled rotors are generally operated at two speeds.
stand-alone PV System
A photovoltaic system that operates independent of the utility grid, an off-grid PV system.
A power source/generator that operates independently of or is not connected to an electric transmission and distribution network; used to meet a load(s) physically close to the generator. (Syn. Off-grid system)
SD - a measure that is used to quantify the amount of variation or dispersion of a set of data values from the average value.
standard test conditions
STC - accepted standard for controlled laboratory testing and certification of PV cells and module output. Standard Test Conditions are defined as 1,000 W/m2 of light intensity with a replicated solar spectrum of AM 1.5 and 25°C cell (or module) temperature.