alternating-current power system

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• Flexible Alternating Current Transmission System — Système de transmission flexible en courant alternatif Pour les articles homonymes, voir Facts. Un système de transmission flexible en courant alternatif, est un équipement d électronique de puissance d appoint utilisé pour contrôler la tension,… …   Wikipédia en Français

• Alternating current — (green curve). The horizontal axis measures time; the vertical, current or voltage. In alternating current (AC, also ac) the movement of electric charge periodically reverses direction. In direct current (DC, also dc), the flow of electric charge …   Wikipedia

• Power engineering — Power engineering, also called power systems engineering, is a subfield of electrical engineering that deals with the generation, transmission and distribution of electric power as well as the electrical devices connected to such systems… …   Wikipedia

• power factor — noun The ratio of the actual power to the apparent power in an alternating current power system; specifically, the cosine of the phase angle between the voltage and the current. The power factor is of interest because it is a measure of the power …   Wiktionary

• Power factor — For other uses, see Power factor (pistol). The power factor of an AC electric power system is defined as the ratio of the real power flowing to the load over the apparent power in the circuit,[1][2] and is a dimensionless number between 0 and 1… …   Wikipedia

• Electric power transmission — Electric transmission redirects here. For vehicle transmissions, see diesel electric transmission. 400 kV high tension transmission lines near Madrid Electric power transmission or high voltage electric transmission is the bulk transfer of… …   Wikipedia

• History of electric power transmission — In the early days of commercial use of electric power, electric power transmission restricted the distance between generating plant and consumers. Originally generation was with direct current, which could not easily be increased in voltage for… …   Wikipedia

• Harmonics (electrical power) — Harmonics are electric voltages and currents that appear on the electric power system as a result of certain kinds of electric loads. Harmonic frequencies in the power grid are a frequent cause of power quality problems.CausesIn a normal… …   Wikipedia

• Power supply unit (computer) — Power supply unit with top cover removed A power supply unit (PSU) supplies direct current (DC) power to the other components in a computer. It converts general purpose alternating current (AC) electric power from the mains (110 V to… …   Wikipedia

• Power transmission — is the movement of energy from its place of generation to a location where it is applied to performing useful work.Power is defined formally as units of energy per unit time.In SI units: 1 watt = 1 joule/s = 1 newton * metre/second… …   Wikipedia

• Power semiconductor device — Power semiconductor devices are semiconductor devices used as switches or rectifiers in power electronic circuits (switch mode power supplies for example). They are also called power devices or when used in integrated circuits, called power… …   Wikipedia