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Vista Coal Mine
The Vista Coal Mine is an open-pit thermal coal mine near Hinton, Alberta, operated by Coalspur Mines and the largest thermal coal mine in Canada.
Vista Energy
Vista Energy, S.A.B. de C.V., is a Mexican oil and gas company founded in 2017 by Miguel Galuccio that develops the Vaca Muerta shale in Argentina's Neuquén Basin.
Vistra
Vistra Corp. is a Fortune 500 integrated retail electricity and power generation company headquartered in Irving, Texas, serving about 5 million customers with a 44,000 MW fleet.
Visund Oil and Gas Field
Visund is an oil and gas field in the Tampen area of the northern Norwegian North Sea, 22 kilometers northeast of Gullfaks, producing oil since 1999 and exporting gas since 2005.
Viton fluoroelastomer
Viton is the trademarked name Chemours gives to its fluoroelastomers, synthetic rubbers classified as FKM that combine elasticity with chemical and thermal resistance, first introduced in 1957.
Vivo Energy
Vivo Energy is a pan-African fuel distribution company created in 2011 when Vitol and Helios acquired Shell's downstream fuels business in Africa, with about 4,200 Shell- and Engen-branded stations.
Vizag Thermal Power Plant
Vizag Thermal Power Plant is a 1,040 MW coal-fired power station at Palavalasa in Visakhapatnam district, Andhra Pradesh, India, owned by Hinduja National Power Corporation.
Vladimir Filanovsky Oil and Gas Field
The Vladimir Filanovsky field is an offshore oil and gas condensate field in the northern Caspian Sea, operated by LUKOIL and the largest oil field in Russia's Caspian sector.
Vltava Cascade
The Vltava Cascade (Vltavská kaskáda) is a system of nine water works on the Vltava River in the Czech Republic, built between 1930 and 1992.
Voador Oil and Gas Field
The Voador oil and gas field is an offshore field in the Campos Basin about 100 miles off Brazil, discovered in 1987 and operated by Petrobras.
Voerde power station
Voerde power station (Kraftwerk Voerde) was a hard coal-fired power station on the Rhine in Voerde, North Rhine-Westphalia, Germany, completed in 1985 and shut down in 2017.
Vogtle Electric Generating Plant
Vogtle Electric Generating Plant, known as Plant Vogtle, is a four-unit nuclear power station in Waynesboro, Georgia, the largest clean energy generator in the United States.
Void coefficient
The void coefficient of reactivity is the rate at which steam bubbles forming in a reactor's coolant change its reactivity, a key factor in reactor safety.
Voisey's Bay Mine
Voisey's Bay Mine is a nickel-copper-cobalt mine in northern Labrador, Canada, about 35 kilometers southwest of Nain. Discovered in 1993, it was one of the most significant mineral finds in Canadian history.
Vojany-Uzhgorod Gas Pipeline
The Vojany-Uzhgorod Gas Pipeline, also called the Budince Pipeline, is a 23 km gas pipeline from Slovakia's Vojany power station to Uzhhorod, Ukraine, opened in 2014.
Volga Hydroelectric Station
The Volga Hydroelectric Station (Волжская ГЭС), also known as the Volgograd Station, is a hydroelectric plant on the Volga River and the largest in Europe by capacity.
Völkersen/Völkersen-Nord Gas Field
Völkersen/Völkersen-Nord is an onshore natural gas field in the Verden district of Lower Saxony, Germany, discovered in 1992, producing from Rotliegend sandstone and among northern Germany's largest gas fields.
Volt/var optimization
Volt/var optimization (VVO) is a distribution-engineering method that coordinates voltage regulators, load tap changers, and capacitor banks to minimize power losses and keep feeder voltages within limits.
Volta Charging
Volta Charging was a California-based American electric-vehicle charging network operator that offered drivers free charging funded by advertising on station displays; Shell acquired it in March 2023, rebranding the stations Shell Recharge.
Volta River Authority
The Volta River Authority (VRA) is Ghana's state-owned electricity generation company, established in 1961 to build the Akosombo Dam, which created Lake Volta, the world's largest man-made lake.
Voltage flicker meter
A voltage flicker meter, or flickermeter, is an instrument that converts rapid mains voltage fluctuations into indices of perceived light flicker, as specified by the international standard IEC 61000-4-15.
Voltage fluctuation
Voltage fluctuation is a power quality disturbance, a continuous variation of RMS voltage caused by arc furnaces, welders, and rapidly changing loads, and linked to flicker.
Voltage ride-through
Voltage ride-through is the ability of a generator, inverter, or large load to stay connected through short voltage dips, required by grid codes such as IEEE 1547.
Voltage sag
Voltage sag, also called a voltage dip, is a short reduction in AC voltage to between 10 and 90 percent of nominal, lasting from half a cycle to 1 minute.
Voltage spike
A voltage spike is a short, high-magnitude transient rise in voltage on an electrical circuit, lasting microseconds to milliseconds and often reaching tens of kilovolts, caused by lightning, switching, or faults.
Voltage stability
Voltage stability is the ability of a power system to maintain steady, acceptable voltages at all buses after a disturbance; its loss can cause cascading blackouts.
Voltage stability analysis
Voltage stability analysis is a power systems engineering method for assessing whether a grid can maintain acceptable voltages, identifying conditions under which voltage collapse would begin.
Voltage swell
A voltage swell is a short-duration rise in RMS voltage to 110% to 180% of nominal lasting up to one minute, classified by IEEE 1159 as a power quality problem.
Voltage transformer
A voltage transformer, also called a potential transformer, is an instrument transformer that supplies meters and protective relays with an accurate scaled replica of system voltage.
Voltage unbalance
Voltage unbalance, also called voltage imbalance, is a power quality condition in three-phase electrical systems where voltages differ in magnitude or deviate from their ideal 120-degree phase angles.