901 articles
Shandong Chenming Paper Holdings
Shandong Chenming Paper Holdings is a Chinese pulp and paper manufacturer headquartered in Shouguang, Shandong, founded in 1958 and hit by a liquidity crisis in 2024 and 2025.
Shanghai Electric Power
Shanghai Electric Power (上海电力股份有限公司) is a Chinese power generation company based in Shanghai and a core subsidiary of State Power Investment Corporation, with coal, gas, wind, and solar assets.
Sharjah Electricity & Water Authority
Sharjah Electricity & Water Authority (SEWA; Arabic: هيئة كهرباء ومياه الشارقة) is the government utility of Sharjah, United Arab Emirates, supplying electricity, desalinated water, and piped natural gas.
Sharper Shape
Sharper Shape is a technology company founded in 2013 in Helsinki, Finland, that builds automated inspection software and aerial data collection services for electric power utilities.
Shenergy
Shenergy (申能) is a wholly state-owned energy conglomerate based in Shanghai, China, founded in 1987 and supervised by Shanghai SASAC. It supplies roughly one-third of the city's electricity.
Shenzhen Energy Group
Shenzhen Energy Group Co., Ltd. (深圳能源) is a state-controlled Chinese utility founded in 1991 and listed in Shenzhen in 1993, generating power, treating waste, and distributing gas.
Shielding angle
The shielding angle, also called the protection angle, is the angle from vertical between an overhead ground wire and the phase conductor it protects on a transmission line.
Shikoku Electric Power
Shikoku Electric Power (四国電力) is a Japanese electric utility, one of nine regional utilities established in 1951, headquartered in Takamatsu and supplying electricity to Shikoku's four prefectures.
Short-circuit analysis
Short-circuit analysis is an electrical engineering method for calculating fault currents and voltages in a power system, used to size protective devices and verify equipment ratings.
Short-circuit breaking capacity
Short-circuit breaking capacity is the maximum fault current a circuit breaker or fuse can safely interrupt at its rated voltage, called interrupting capacity in North America.
Short-circuit ratio
The short-circuit ratio (SCR) is a power system metric that quantifies the strength of an AC grid at a point of interconnection, with low values indicating a weak system.
Short-term load forecasting
Short-term load forecasting (STLF) predicts electrical power demand over horizons from an hour to a week or more, feeding unit commitment, dispatch, and market bidding.
Shunt reactor
A shunt reactor is an inductive device connected in parallel with high-voltage transmission lines to absorb capacitive reactive power, preventing excessive voltages on lightly loaded lines and cables.
Silver Spring Networks
Silver Spring Networks was an American smart grid networking company for utilities and cities, headquartered in Redwood City, California, and acquired by Itron in January 2018.
Singapore Power International
Singapore Power International Pte Ltd, formerly PowerGas Investments, is the investment holding company of Singapore's SP Group, incorporated in 1994 and holding a 40 percent stake in Australia's Jemena.
Single Day-Ahead Coupling
Single Day-Ahead Coupling is the pan-European day-ahead electricity market coupling that allocates cross-border transmission capacity via implicit auctions, run by NEMOs and TSOs under the CACM framework.
Single-line diagram
A single-line diagram, also called a one-line diagram, is a simplified drawing of an electrical power system that shows power flow with single lines and standard symbols.
Single-phase electric power
Single-phase electric power, abbreviated 1φ, is alternating current distribution in which all supply voltages vary in unison, serving homes and small buildings while three-phase systems serve industrial loads.
Sinusoidal pulse-width modulation
Sinusoidal pulse-width modulation is a modulation technique that controls a DC-AC inverter by comparing a sinusoidal reference with a high-frequency triangular carrier, reducing output harmonics.
Small-signal stability
Small-signal stability is the ability of a power system to maintain synchronism under small disturbances like load changes, analyzed by linearizing the system around an operating point.
Smart grid
The smart grid, also called grid modernization, is an electricity network upgraded with digital technology and two-way communication so utilities and customers can exchange information and manage energy use.
Smart meter
A smart meter, also called a smart energy meter, is an electronic utility meter that records electricity use in intervals and sends readings to the supplier automatically.
Smoothing reactor
A smoothing reactor is a large inductor connected in series at the DC terminal of an HVDC converter station, smoothing current ripple and limiting fault current.
Société nationale d'électricité du Congo
Société nationale d'électricité du Congo, known as SNEL, is the state-owned electricity utility of the Democratic Republic of the Congo, created in 1970 and operating the Inga dams.
Soil resistivity
Soil resistivity is the measure of how strongly soil resists conducting electrical current, a basic parameter for grounding, lightning protection, and corrosion control of buried structures.
Sol Burstein
Sol Burstein (1922–2002) was an American mechanical and nuclear engineer who led Wisconsin Electric's Point Beach nuclear plants and was elected to the National Academy of Engineering in 1985.
Solid-state circuit breaker
A solid-state circuit breaker is an electrical protection device that interrupts fault current with power semiconductor switches in microseconds, aimed mainly at fast-rising DC fault currents.
Solid-state transformer
A solid-state transformer (SST) is a power electronics-based device that converts voltage with semiconductor converters and a compact medium-frequency transformer, adding functions like fault current limiting and bidirectional power flow control.
Sonelgaz
Sonelgaz (سونلغاز), formally the National Company for Electricity and Gas, is Algeria's state-owned utility for electricity and gas distribution, created in 1969 and restructured as a holding company in 2002.
SONI (System Operator for Northern Ireland)
SONI, the System Operator for Northern Ireland, is the licensed transmission system operator for the region, owned by EirGrid since 2009 and jointly operating the all-island wholesale electricity market.