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Montézic Power Station
The Montézic Power Station ( French: ''Centrale de Montézic'') is a pumped-storage power plant near the commune of Montézic in northern Aveyron, France. Its 910 megawatt capacity ranks it second among France's main pumped-storage facilities, and is the only one situated on the Central Massif. Montézic is a pure pumped-storage plant, which means that its upstream reservoir receives little to no natural inflow of water. The station has a weekly time cycle. History The construction of the power station started in 1976 and it was commissioned in 1982. The following are some key dates from this period: In August 1976: the power station's access tunnel was bored, and betweenNovember 1977 and July 1978 Grading work for the plant, the connecting tunnels, and the dams was carried out. In July 1979 assembly of the turbine generators took place. In May 1981 the Etang Dam (''Barrage de l'Etang'') was completed, and from June to August the upper reservoir was filled. * October 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montézic
Montézic (; ) is a commune in the Aveyron department in southern France. The Montézic Power Station, a pumped-storage hydroelectricity plant, is located near the commune. Charles de Louvrié, inventor of the jet engine, was born in the commune. Population See also *Communes of the Aveyron department The following is a list of the 285 communes of the Aveyron department of France. Out of the land area is being , and the percentage of the department's land area is just 34 per cent of its land area of an average commune. The communes cooperat ... References Communes of Aveyron Aveyron communes articles needing translation from French Wikipedia {{Aveyron-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truyère River
The Truyère () is a river in south-western France, right tributary of the Lot. Its source is in the south-western Massif Central, north of Mende. It flows generally west through the following ''départements'' and towns: * Lozère: Le Malzieu-Ville * Cantal * Aveyron: Entraygues-sur-Truyère The Truyère flows into the Lot in Entraygues-sur-Truyère. Its main tributaries are the Bès near Albaret-le-Comtal, the Goul near Saint-Hippolyte and the Selves near Campouriez. The Truyère feeds several reservoirs, like the Lac de Grandval and the Lac de Barrage de Sarrans, to supply hydroelectricity. The Garabit Viaduct, built by Gustave Eiffel, spans the Truyère near Ruynes-en-Margeride. File:France, Aveyron, Barrage de Sarrans.jpg, Sarrans hydroelectric dam File:Truyère Château d'Alleuze.jpg, Truyère river and Château d'Alleuze File:Truyère Grandval.jpg, Truyère river at Lac de Grandval Lac de Grandval is a reservoir lake in Cantal, France France, offici ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Outage
A power outage, also called a blackout, a power failure, a power blackout, a power loss, a power cut, or a power out is the complete loss of the electrical power network supply to an end user. There are many causes of power failures in an electricity network. Examples of these causes include faults at power stations, damage to Electric power transmission, electric transmission lines, Electrical substation, substations or other parts of the electricity distribution, distribution system, a short circuit, Cascading failure#Cascading failure in power transmission, cascading failure, fuse (electrical), fuse or circuit breaker operation. Power failures are particularly critical at sites where the environment and public safety are at risk. Institutions such as hospitals, Sewage Treatment, sewage treatment plants, and mining, mines will usually have backup power sources such as emergency power system, standby generators, which will automatically start up when electrical power is lost ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Grid
''Power Grid'' is the English-language version of the second edition of the multiplayer German-style board game ''Funkenschlag'', designed by Friedemann Friese and first released in 2004. ''Power Grid'' was released by Rio Grande Games. In the game, each player represents a company which owns power plants and tries to supply electricity to cities. During the game, players bid on power plants and buy resources to provide electricity to the growing number of cities in their network. Background ''Power Grid'' was developed from ''Funkenschlag'', the original game, which had players draw their networks with crayons instead of playing on a fixed map. This and other changes were made when Friedemann Friese reworked the game. The new game is called ''Funkenschlag'' in the German market, but is sold under other names elsewhere. Game play The game comes with a double-sided board with a map of the United States on one side and Germany on the other. Each map has six regions, conta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synchronization (alternating Current)
In an alternating current (AC) electric power system, synchronization is the process of matching the frequency, phase and voltage of a generator or other source to an electrical grid in order to transfer power. If two unconnected segments of a grid are to be connected to each other, they cannot safely exchange AC power until they are synchronized. A direct current (DC) generator can be connected to a power network simply by adjusting its open-circuit terminal voltage to match the network's voltage, by either adjusting its speed or its field excitation. The exact engine speed is not critical. However, an AC generator must additionally match its timing (frequency and phase) to the network voltage, which requires both speed and excitation to be systematically controlled for synchronization. This extra complexity was one of the arguments against AC operation during the war of currents in the 1880s. In modern grids, synchronization of generators is carried out by automatic systems. C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thyristors
A thyristor (, from a combination of Greek language ''θύρα'', meaning "door" or "valve", and ''transistor'' ) is a solid-state semiconductor device which can be thought of as being a highly robust and switchable diode, allowing the passage of current in one direction but not the other, often under control of a gate electrode, that is used in high power applications like inverters and radar generators. It usually consists of four layers of alternating P- and N-type materials. It acts as a bistable switch (or a latch). There are two designs, differing in what triggers the conducting state. In a three-lead thyristor, a small current on its gate lead controls the larger current of the anode-to-cathode path. In a two-lead thyristor, conduction begins when the potential difference between the anode and cathode themselves is sufficiently large (breakdown voltage). The thyristor continues conducting until the voltage across the device is reverse-biased or the voltage is removed (b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Revolutions Per Minute
Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or r⋅min−1) is a unit of rotational speed (or rotational frequency) for rotating machines. One revolution per minute is equivalent to hertz. Standards ISO 80000-3:2019 defines a physical quantity called ''rotation'' (or ''number of revolutions''), dimensionless, whose instantaneous rate of change is called ''rotational frequency'' (or ''rate of rotation''), with units of reciprocal seconds (s−1). A related but distinct quantity for describing rotation is ''angular frequency'' (or ''angular speed'', the magnitude of angular velocity), for which the SI unit is the radian per second (rad/s). Although they have the same dimensions (reciprocal time) and base unit (s−1), the hertz (Hz) and radians per second (rad/s) are special names used to express two different but proportional ISQ quantities: frequency and angular frequency, respectively. The conversions between a frequency and an angular frequency ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frequency Changer
A frequency changer or frequency converter is Electronics, electronic or electromechanical equipment that converts alternating current (Alternating current, AC) of one frequency to alternating current of another frequency. The equipment may also change the voltage, but if it does, that is incidental to its principal purpose, since voltage conversion of alternating current is much easier to achieve than frequency conversion. Traditionally, these were electromechanical machines called a motor-generator set. There were also mercury arc rectifiers or vacuum tubes in use. With the advent of solid state electronics, it has become possible to build completely electronic frequency changers. These usually consist of a rectifier stage (producing direct current) which is then inverted to produce AC of the desired frequency. The inverter (electrical), inverter may use thyristors, Integrated gate-commutated thyristor, IGCTs or Insulated-gate bipolar transistor, IGBTs. If voltage conversion is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Substation
A substation is a part of an electrical generation, transmission, and distribution system. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Between the generating station and the consumer, electric power may flow through several substations at different voltage levels. A substation may include transformers to change voltage levels between high transmission voltages and lower distribution voltages, or at the interconnection of two different transmission voltages. They are a common component of the infrastructure. There are 55,000 substations in the United States. Substations are also occasionally known in some countries as switchyards. Substations may be owned and operated by an electrical utility, or may be owned by a large industrial or commercial customer. Generally substations are unattended, relying on SCADA for remote supervision and control. The word ''substation'' comes from the days before the distri ... [...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] |
Megavolt Ampere
The volt-ampere ( SI symbol: VA, sometimes V⋅A or V A) is the unit of measurement for apparent power in an electrical circuit. It is the product of the root mean square voltage (in volts) and the root mean square current (in amperes). Volt-amperes are usually used for analyzing alternating current (AC) circuits. In direct current (DC) circuits, this product is equal to the real power, measured in watts. The volt-ampere is dimensionally equivalent to the watt: in SI units, 1 V⋅A = 1 W. VA rating is most used for generators and transformers, and other power handling equipment, where loads may be reactive (inductive or capacitive). Formulation For a simple electrical circuit running on direct current, the electrical current and voltage are constant. In that case, the real power (''P'', measured in watts) is the product of the current (''I'', measured in amperes) and the voltage from one side of the circuit to the other (''V'', measured in volts): :P = I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kilovolts
The volt (symbol: V) is the unit of electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI). Definition One volt is defined as the electric potential between two points of a conducting wire when an electric current of one ampere dissipates one watt of power between those points. It can be expressed in terms of SI base units ( m, kg, s, and A) as : \text = \frac = \frac = \frac = \text\text^2\text^. Equivalently, it is the potential difference between two points that will impart one joule of energy per coulomb of charge that passes through it. It can be expressed in terms of SI base units ( m, kg, s, and A) as : \text = \frac = \frac = \frac = \text\text^2\text^. It can also be expressed as amperes times ohms (current times resistance, Ohm's law), webers per second (magnetic flux per time), watts per ampere (power per current), or joules per coulomb (energy per charge), which is also equivalent t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
