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Staged Z-pinch
The staged Z-pinch is a magneto-inertial fusion concept introduced in 1995, in which a pulsed current drives a plasma liner onto deuterium fuel; experiments have produced over 10 billion neutrons.
Stall regulation
Stall regulation limits a wind turbine's power output through aerodynamic stall: as wind speed rises, airflow separates from the blade, reducing lift without blade pitch control.
Standard Oil of Ohio (Sohio)
Standard Oil of Ohio, known as Sohio, was an American petroleum company in Cleveland, BP's principal United States arm from 1969 until the brand retired in 1991.
Standard Solar
Standard Solar is an American commercial and community solar developer, financier, and asset owner in Rockville, Maryland, founded in 2004 and owned by Brookfield Renewable since 2022.
Standby power
Standby power, also called vampire power or phantom load, is the electricity consumed by devices that appear switched off while still plugged in, totaling 20 to 60 watts per home.
Standortauswahlgesetz
The Standortauswahlgesetz (StandAG), the Repository Site Selection Act, is a German federal law requiring a science-based search for a nuclear waste repository, begun in 2013.
Stanley C. Suboleski
Stanley C. Suboleski is an American mining engineer and coal executive who served at Massey Energy and is a member of the National Academy of Engineering.
Stanlow Refinery
Stanlow Refinery is an oil refinery at Ellesmere Port, Cheshire, England, on the Manchester Ship Canal, owned by EET Fuels and producing about one-sixth of Britain's transport fuels.
Stanmore Resources
Stanmore Resources Limited, formerly Stanmore Coal Limited, is an Australian metallurgical coal mining company headquartered in Brisbane that operates Bowen Basin mines supplying global steelmakers.
Stanwell Corporation
Stanwell Corporation is a Queensland Government Owned Corporation that generates, trades, and retails electricity. Established in 1997, it operates coal-fired power stations at Rockhampton and the South Burnett.
Stanwell power station
Stanwell power station is a coal-fired power station 22 km west of Rockhampton in Central Queensland, owned by Queensland's Stanwell Corporation and supplying around 15% of the state's electricity.
Star Energy Geothermal
Star Energy Geothermal is an Indonesian geothermal energy producer operating the Wayang Windu, Salak, and Darajat fields in West Java, supplying 886 MW to the Java-Madura-Bali grid.
StarPlus Energy
StarPlus Energy is a joint venture of Stellantis and Samsung SDI, formed in 2022 to build two battery plants in Kokomo, Indiana, backed by over $6.3 billion in investment and a $7.54 billion federal loan.
START (tokamak)
START (Small Tight Aspect Ratio Tokamak) was the world's first hot spherical tokamak, a compact, low-cost fusion experiment at Culham, UK, operating from 1991 to 1998.
Startorus Fusion (星环聚能)
Startorus Fusion (星环聚能) is a Chinese private fusion energy startup founded in 2021 as a Tsinghua University spin-off in Xi'an, developing compact spherical tokamaks heated by magnetic reconnection.
State Corporation Commission (Virginia)
The State Corporation Commission (SCC) is an independent Virginia regulatory agency, created in 1902, that regulates utilities, insurance, banks, securities, and railroads and files corporate charters.
State Grid Corporation of China (国家电网公司)
State Grid Corporation of China (国家电网公司) is the state-owned enterprise that builds and operates most of China's electric power grid. Founded in 2002, it serves over 1.1 billion people across 26 provinces.
State Grid Xinyuan
State Grid Xinyuan Holdings Co. (国网新源) is a Beijing company, founded in 2005, that operates pumped-storage hydropower stations and is the world's largest pumped-storage operator.
State of charge
State of charge (SoC) is the fraction of a battery's capacity currently available, expressed as a percentage; since it cannot be measured directly, battery management systems estimate it.
State of health
State of health (SOH) measures a rechargeable battery's general condition against its initial state; a new battery is 100%, and 80% is commonly considered end of life.
Statera Energy
Statera Energy is a London-headquartered UK company developing grid-scale battery storage, flexible generation, pumped hydro, and green hydrogen, founded in 2015 and owned by EQT Infrastructure since 2024.
Statfjord oil field
Statfjord is an oil and gas field in the northern North Sea, straddling the Norway–UK sector border, discovered by Mobil in 1974 and producing since November 1979.
Static synchronous compensator
A static synchronous compensator, also written static synchronous condenser, is a shunt FACTS device that supplies or absorbs reactive power on an AC grid to regulate voltage.
Static synchronous series compensator
The static synchronous series compensator (SSSC) is a converter-based FACTS device that injects a controllable voltage in quadrature with line current, controlling power flow like a series capacitor or reactor.
Static VAR compensator
A static VAR compensator (SVC) is a shunt-connected power-electronic device regulating voltage on AC networks through thyristor-controlled reactive compensation, a standard FACTS controller first applied commercially in 1964.
Station blackout
A station blackout (SBO) is the complete loss of AC electrical power at a nuclear power plant, caused when both offsite grid power and emergency diesel generators fail.
Station post insulator
A station post insulator is a rigid insulator used in high-voltage substations to support bus bars, conductors, and disconnect switches, made in porcelain, composite, and toughened glass.
Station service transformer
A station service transformer (SST), also called a station auxiliary transformer, supplies a power plant's own auxiliary loads from the high-voltage transmission network, independent of generator status.
Statiq
Statiq is an Indian electric vehicle charging company founded by Akshit Bansal and Raghav Arora in 2019, operating a public charging network backed by Y Combinator and Shell.
Statkraft
Statkraft is a Norwegian state-owned renewable energy company and Europe's largest supplier of renewable energy, tracing its origins to the state's purchase of a waterfall in 1895.