|
Converter Station
An HVDC converter station (or simply converter station) is a specialised type of substation which forms the terminal equipment for a high-voltage direct current (HVDC) transmission line.Arrillaga, Jos; High Voltage Direct Current Transmission, second edition, Institution of Electrical Engineers, , 1998. It converts direct current to alternating current or the reverse. In addition to the converter, the station usually contains: * three-phase alternating current switch gear * transformers * capacitors or synchronous condensers for reactive power * filters for harmonic suppression, and * direct current switch gear. Components Converter The converter is usually installed in a building called the valve hall. Early HVDC systems used mercury-arc valves, but since the mid-1970s, solid state devices such as thyristors have been used. Converters using thyristors or mercury-arc valves are known as ''line commutated converters''. In thyristor-based converters, many thyristors are con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nelson River Bipoles 1 And 2 Terminus At Rosser
Nelson may refer to: Arts and entertainment * Nelson (1918 film), ''Nelson'' (1918 film), a historical film directed by Maurice Elvey * Nelson (1926 film), ''Nelson'' (1926 film), a historical film directed by Walter Summers * Nelson (opera), ''Nelson'' (opera), an opera by Lennox Berkeley to a libretto by Alan Pryce-Jones * Nelson (band), an American rock band * ''Nelson'', a 2010 album by Paolo Conte People * Nelson (surname), including a list of people with the name * Nelson (given name), including a list of people with the name * Horatio Nelson, 1st Viscount Nelson (1758–1805), British admiral * Nelson Mandela, the first black South African president * Bishop of Nelson (other), a title sometimes referred to as "Nelson" Fictional characters * Alice Nelson, the housekeeper on the TV series ''The Brady Bunch'' * Dave Nelson, a main character on the TV series ''NewsRadio'' * Emma Nelson (Degrassi: The Next Generation), on the TV series ''Degrassi: The Next Generation'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry (unit)
The henry (symbol: H) is the unit of electrical inductance in the International System of Units (SI), defined as 1 kg⋅ m2⋅ s−2⋅ A−2. If a current of 1 ampere flowing through a coil produces flux linkage of 1 weber turn, that coil has a self-inductance of 1 henry. The unit is named after Joseph Henry (1797–1878), the American scientist who discovered electromagnetic induction independently of and at about the same time as Michael Faraday (1791–1867) in England. Definition The inductance of an electric circuit is one henry when an electric current that is changing at one ampere per second results in an electromotive force of one volt The volt (symbol: V) is the unit of electric potential, Voltage#Galvani potential vs. electrochemical potential, electric potential difference (voltage), and electromotive force in the International System of Units, International System of Uni ... across the inductor: V(t)= L \frac\,, where is the resulting voltage ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volga Hydroelectric Station
The Volga Hydroelectric Station or Volga GES () also known as the 22nd Congress of the CPSU Stalingrad/Volgograd Hydroelectric Power Station (), is the largest hydroelectric station in Europe, and the last of the Volga-Kama Cascade of dams, immediately before the Volga River flows into the Caspian Sea. It was the largest powerstation in the world between 1960 and 1963. Today, it is operated by the partly government-owned electricity company RusHydro. History Built as part of a massive postwar effort known as the Great Construction Projects of Communism, it was authorized by Joseph Stalin signing the Council of Ministers of the USSR order #3555 on 6 August 1950. The plan called for building a station north of the city of Stalingrad (modern Volgograd) with a minimum storage capacity of 1.7 million kWh. Ten thousand youths from the Komsomol league participated in the construction, and the city of Volzhsky was formed on the left bank of the river to provide housing. Machinery ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HVDC Volgograd-Donbass
A high-voltage direct current (HVDC) electric power transmission system uses direct current (DC) for electric power transmission, in contrast with the more common alternating current (AC) transmission systems. Most HVDC links use voltages between 100 kV and 800 kV. HVDC lines are commonly used for long-distance power transmission, since they require fewer conductors and incur less power loss than equivalent AC lines. HVDC also allows power transmission between AC transmission systems that are not synchronized. Since the power flow through an HVDC link can be controlled independently of the phase angle between source and load, it can stabilize a network against disturbances due to rapid changes in power. HVDC also allows the transfer of power between grid systems running at different frequencies, such as 50 and 60 Hz. This improves the stability and economy of each grid, by allowing the exchange of power between previously incompatible networks. The modern form o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Station
A power station, also referred to as a power plant and sometimes generating station or generating plant, is an industrial facility for the electricity generation, generation of electric power. Power stations are generally connected to an electrical grid. Many power stations contain one or more Electric generator, generators, rotating machine that converts mechanical power into three-phase electric power. The relative motion between a magnetic field and a Electrical conductor, conductor creates an electric current. The energy source harnessed to turn the generator varies widely. Most power stations in the world burn fossil fuels such as coal, petroleum, oil, and natural gas to generate electricity. Low-carbon power sources include nuclear power, and use of renewable energy, renewables such as solar power, solar, wind power, wind, geothermal power, geothermal, and hydroelectricity, hydroelectric. History In early 1871 Belgian inventor Zénobe Gramme invented a generator powerfu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mega Volt Amper
Mega or MEGA may refer to: Science * mega-, a metric prefix denoting 106 * Mega (number), a certain very large integer in Steinhaus–Moser notation * "mega-" a prefix meaning "large" that is used in taxonomy * Gravity assist, for ''Moon-Earth gravity assist'' and ''Mars-Earth gravity assist'' Business * Aixam-Mega, a French automobile manufacturer based in Aix-les-Bains, Savoie * Megaupload, a file sharing site seized by the FBI * Mega (service), a cloud storage and file hosting service * Mega Aircompany, a charter airline based in Almaty, Kazakhstan * Mega Enterprise, a South Korean company that specialises in developing games * MEGA International Srl., a French software company * Mega Maldives, a Maldivian airline * MEGA, a Russian chain of supermarkets, until september 2023 owned by IKEA Music * ''Mega'' (Yacht album), 2005 * ''Mega'' (Blank Banshee album), 2016 * Mega Records, a US record label * Mega Records, former name of Danish record company Edel-Mega Rec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delta-wye Transformer
A delta-wye transformer is a type of three-phase electric power transformer design that employs delta-connected windings on its primary and wye/star connected windings on its secondary. A neutral wire can be provided on wye output side. It can be a single three-phase transformer, or built from three independent single-phase units. An equivalent term is delta-star transformer. Transformers Delta-wye transformers are common in commercial, industrial, and high-density residential locations, to supply three-phase Electric power distribution, distribution systems. An example would be a distribution transformer with a delta primary, running on three 11 kV phases with no neutral or earth required, and a star (or wye) secondary providing a 3-phase supply at 415 V, with the domestic voltage of 240 available between each phase and the earthed (grounded) neutral point. The delta winding allows third-harmonic currents to circulate within the transformer, and prevents third-harmonic cur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Voltage
Voltage, also known as (electrical) potential difference, electric pressure, or electric tension, is the difference in electric potential between two points. In a Electrostatics, static electric field, it corresponds to the Work (electrical), work needed per unit of Electric charge, charge to move a positive Test particle#Electrostatics, test charge from the first point to the second point. In the SI unit, International System of Units (SI), the SI derived unit, derived unit for voltage is the ''volt'' (''V''). The voltage between points can be caused by the build-up of electric charge (e.g., a capacitor), and from an electromotive force (e.g., electromagnetic induction in a Electric generator, generator). On a macroscopic scale, a potential difference can be caused by electrochemical processes (e.g., cells and batteries), the pressure-induced piezoelectric effect, and the thermoelectric effect. Since it is the difference in electric potential, it is a physical Scalar (physics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transformer
In electrical engineering, a transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple Electrical network, 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, 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 Alternating current, 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 signa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baltic Cable
The Baltic Cable is a monopolar HVDC power line running beneath the Baltic Sea that interconnects the electric power grids of Germany and Sweden. Its maximum transmission power is 600 megawatts (MW). The Baltic Cable uses a transmission voltage of 450 kV – the highest operating voltage for energy transmission in Germany. The total project cost was 2 billion SEK (US$280 million), and the link was put into operation in December 1994. With a length of , it was the second longest high voltage undersea cable on earth, until Basslink came into service in 2006. Route The Baltic Cable is the only interconnector between the price zones Germany/Luxemburg (DE/LU) and Sweden 4 (SE4) and starts in Germany at the converter station at Lübeck-Herrenwyk, which is on the site of a former coal-fired power station, It crosses the river Trave in a channel below the bottom of the river and then follows its course as sea cable laid at the eastern side of the river. Afte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LC Circuit
An LC circuit, also called a resonant circuit, tank circuit, or tuned circuit, is an electric circuit consisting of an inductor, represented by the letter L, and a capacitor, represented by the letter C, connected together. The circuit can act as an electrical resonator, an electrical analogue of a tuning fork, storing energy oscillating at the circuit's resonant frequency. LC circuits are used either for generating signals at a particular frequency, or picking out a signal at a particular frequency from a more complex signal; this function is called a bandpass filter. They are key components in many electronic devices, particularly radio equipment, used in circuits such as oscillators, filters, tuners and frequency mixers. An LC circuit is an idealized model since it assumes there is no dissipation of energy due to resistance. Any practical implementation of an LC circuit will always include loss resulting from small but non-zero resistance within the components and connect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
