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Phase-shifter
A phase angle regulating transformer, phase angle regulator (PAR, American usage), phase-shifting transformer, phase shifter (West coast American usage), or quadrature booster (quad booster, British usage), is a specialised form of transformer used to control the flow of real power on Three-phase electric power, three-phase Electric power transmission, electric transmission networks. For an alternating current transmission line, power flow through the line is proportional to the sine of the difference in the Phasor, phase angle of the voltage between the transmitting end and the receiving end of the line. Where parallel circuits with different capacities exist between two points in a transmission grid (for example, an overhead line and an underground cable), direct manipulation of the phase angle allows control of the division of power flow between the paths, preventing overload. Quadrature boosters thus provide a means of relieving overloads on heavily laden circuits and re-routin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Power Transmission
Electric power transmission is the bulk movement of electrical energy from a generating site, such as a power plant, to an electrical substation. The interconnected lines that facilitate this movement form a ''transmission network''. This is distinct from the local wiring between high-voltage substations and customers, which is typically referred to as electric power distribution. The combined transmission and distribution network is part of electricity delivery, known as the electrical grid. Efficient long-distance transmission of electric power requires high voltages. This reduces the losses produced by strong currents. Transmission lines use either alternating current (HVAC) or direct current (HVDC). The voltage level is changed with transformers. The voltage is stepped up for transmission, then reduced for local distribution. A wide area synchronous grid, known as an "interconnection" in North America, directly connects generators delivering AC power with the same rela ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ELIA PST Monceau 400MVA
Elia is a name which may be a variant of the names Elias, Elijah (other), Elijah, Eli or Eliahu, and may refer to: People * Aelia (gens) or Elia, a ''gens'' of Ancient Rome Mononymic * Elia or Elijah, a biblical prophet * Elia, a pen-name of Charles Lamb First name *Elia Abu Madi, (1890–1957), Lebanese poet *Elia Barceló (born 1957), Spanish writer *Elia Goode Byington (1858–1936), American journalist *Elia Cmíral (born 1950), Czech film composer *Elia Dalla Costa (1872–1961), Italian cardinal and Archbishop of Florence *Elia del Medigo (1458–1493), Greek rabbi *Elia Favilli (born 1989), Italian cyclist *Elia Frosio (1913–2005), Italian cyclist *Elia Galera (born 1973), Spanish actress *Elia Kaiyamo (born 1951), Namibian politician *Elia Kazan (1909–2003), American director and producer *Elia Legati (born 1986), Italian football player *Elia Levita (1469–1549), German Hebrew scholar *Elia Liut (1894–1952), Italian aviator *Elia Luini (born 1979), Ita ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Series And Parallel Circuits
Two-terminal components and electrical networks can be connected in series or parallel. The resulting electrical network will have two terminals, and itself can participate in a series or parallel topology. Whether a two-terminal "object" is an electrical component (e.g. a resistor) or an electrical network (e.g. resistors in series) is a matter of perspective. This article will use "component" to refer to a two-terminal "object" that participate in the series/parallel networks. Components connected in series are connected along a single "electrical path", and each component has the same current through it, equal to the current through the network. The voltage across the network is equal to the sum of the voltages across each component. Components connected in parallel are connected along multiple paths, and each component has the same voltage across it, equal to the voltage across the network. The current through the network is equal to the sum of the currents through each com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Induction Regulator
An induction regulator is an alternating current electrical machine, somewhat similar to an induction motor, which can provide a continuously variable output voltage. The induction regulator was an early device used to control the voltage of electric networks. Since the 1930s it has been replaced in distribution network applications by the Tap (transformer), tap transformer. Its usage is now mostly confined to electrical laboratories, electrochemical processes and arc welding. With minor variations, its setup can be used as a Quadrature booster, phase-shifting power transformer. Construction A single-phase induction regulator has a (primary) excitation winding, connected to the supply voltage, wound on a magnetic core which can be rotated. The stationary secondary winding is connected in series with the circuit to be regulated. As the excitation winding is rotated through 180 degrees, the voltage induced in the series winding changes from adding to the supply voltage to opposing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hradec Substation
Hradec substation ( cs, rozvodna Hradec) is a Electrical substation#Collector substation, collector substation connecting the 220 kV and 400 kV grid in the Czech Republic's electricity grid. It is situated in Rokle near its local part Hradec in the Ústí nad Labem Region. Description In Hradec the high voltage transmission lines from the surrounding lignite-fired power stations come together and the distribution of load takes place. Hradec is starting point of two high voltage transmission lines to Germany, a 400 kV line to Chemnitz#Administrative divisions, Röhrsdorf in Saxony and a 400 kV line to GKK Etzenricht, Etzenricht in Bavaria. The transmission capacity of the line to Röhrsdorf, which went into service during 1976, is 2640 MW. The 220 kV link to Zwönitz, which was built in the 1950s, no longer exists. There are direct 400 kV interconnections from the substation to Tušimice Power Station, Tušimice and Prunéřov Power Station, Prunéřov power stations. The 400 kV l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quad Booster
Quad as a word or prefix usually means 'four'. It may refer to: Government * Quadrilateral Security Dialogue, a strategic security dialogue between Australia, India, Japan, and the United States * Quadrilateral group, an informal group which includes the trade spokesmen of the United States, Japan, Canada, and the European Union * Quad Cities, a group of five cities straddling the boundary between the U.S. states of Iowa and Illinois * The "Quad", the senior members of the Cameron–Clegg coalition government in the United Kingdom from 2010 to 2015 Art and entertainment * Matthias Quad (1557–1613), engraver and cartographer * ''Quad'' (film), 2015 * Quad (music), a musical project by Gary Ramon * ''Quad'' (play), by Samuel Beckett * ''The Quad'' (TV series), 2017 * Quad (arts centre), in Derby, United Kingdom * Quad Cinema, art house in New York City, New York * Quad (company), formerly Quad/Graphics, an American printing company * Quadruple combination, the four books tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transmission Line
In electrical engineering, a transmission line is a specialized cable or other structure designed to conduct electromagnetic waves in a contained manner. The term applies when the conductors are long enough that the wave nature of the transmission must be taken into account. This applies especially to radio-frequency engineering because the short wavelengths mean that wave phenomena arise over very short distances (this can be as short as millimetres depending on frequency). However, the theory of transmission lines was historically developed to explain phenomena on very long telegraph lines, especially submarine telegraph cables. Transmission lines are used for purposes such as connecting radio transmitters and receivers with their antennas (they are then called feed lines or feeders), distributing cable television signals, trunklines routing calls between telephone switching centres, computer network connections and high speed computer data buses. RF engineers commonly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
One-line Diagram
In power engineering, a single-line diagram (SLD), also sometimes called one-line diagram, is a simplest symbolic representation of an electric power system. A single line in the diagram typically corresponds to more than one physical conductor: in a direct current system the line includes the supply and return paths, in a three-phase system the line represents all three phases (the conductors are both supply and return due to the nature of the alternating current circuits). The one-line diagram has its largest application in power flow studies. Electrical elements such as circuit breakers, transformers, capacitors, bus bars, and conductors are shown by standardized schematic symbols. Instead of representing each of three phases with a separate line or terminal, only one conductor is represented. It is a form of block diagram graphically depicting the paths for power flow between entities of the system. Elements on the diagram do not represent the physical size or location ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tap (transformer)
A transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits. A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force (EMF) across any other coils wound around the same core. Electrical energy can be transferred between separate coils without a metallic (conductive) connection between the two circuits. Faraday's law of induction, discovered in 1831, describes the induced voltage effect in any coil due to a changing magnetic flux encircled by the coil. Transformers are used to change AC voltage levels, such transformers being termed step-up or step-down type to increase or decrease voltage level, respectively. Transformers can also be used to provide galvanic isolation between circuits as well as to couple stages of signal-processing circuits. Since the invention of the first constant-potential transfo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vector Sum
In mathematics, physics, and engineering, a Euclidean vector or simply a vector (sometimes called a geometric vector or spatial vector) is a geometric object that has magnitude (or length) and direction. Vectors can be added to other vectors according to vector algebra. A Euclidean vector is frequently represented by a '' directed line segment'', or graphically as an arrow connecting an ''initial point'' ''A'' with a ''terminal point'' ''B'', and denoted by \overrightarrow . A vector is what is needed to "carry" the point ''A'' to the point ''B''; the Latin word ''vector'' means "carrier". It was first used by 18th century astronomers investigating planetary revolution around the Sun. The magnitude of the vector is the distance between the two points, and the direction refers to the direction of displacement from ''A'' to ''B''. Many algebraic operations on real numbers such as addition, subtraction, multiplication, and negation have close analogues for vectors, operations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
