901 articles
2015 Ukraine power grid cyberattack
The 2015 Ukraine power grid cyberattack cut electricity to about 225,000 customers on December 23, 2015, the first confirmed cyberattack to disrupt an operating power grid.
2019 California PSPS shutoffs
The 2019 California PSPS shutoffs were deliberate Public Safety Power Shutoffs by California utilities, chiefly PG&E, to keep power lines from igniting wildfires during extreme fire weather.
2021 Texas power crisis
The 2021 Texas power crisis, known as the Great Texas Freeze, was a February 2021 grid failure that cut power to over 4.5 million homes during Winter Storm Uri.
2026 Gary power outage
The 2026 Gary power outage was the loss of power to roughly 38,300 Gary, Indiana, homes and businesses after an August 11, 2026 derecho brought winds over 100 mph.
765 kV
765 kV is a voltage level for extra-high-voltage AC power transmission, the highest used in North America since 1969 and a backbone voltage for bulk power transfer in India.
765 kV transmission line green corridor
The 765 kV transmission line green corridor is India's network of extra-high-voltage lines and substations built to carry bulk renewable power from Khavda, Gujarat, to demand centers nationwide.
Aboitiz Power
Aboitiz Power Corporation is a Philippine holding company for power generation, distribution, and retail electricity supply, incorporated in 1998 and listed on the Philippine Stock Exchange since 2007.
Abu Dhabi National Energy Company
Abu Dhabi National Energy Company, known as TAQA (Arabic for energy), is a state-controlled Abu Dhabi power and water utility founded in 2005 with assets in 26 countries.
AC power plugs and sockets
AC power plugs and sockets are connectors that link appliances to the AC mains supply, with plug types A through O defined by national standards.
AC power plugs and sockets: British and related types
The British plug and socket system, standardized as BS 1363 and known as Type G, is the 13-ampere, fused, three-pin plug system used in the United Kingdom and Ireland.
Accelerated Strategic Transmission Investment
Accelerated Strategic Transmission Investment (ASTI) is an Ofgem framework, introduced in December 2022, that fast-tracks funding for 26 strategic onshore transmission projects supporting 50GW of offshore generation by 2030.
ACEA (utility)
Acea S.p.A. is an Italian multiutility headquartered in Rome, controlled by Roma Capitale and listed in Milan since 1999, Italy's top water operator serving about 10 million people.
Active neutral-point-clamped converter
The active neutral-point-clamped (ANPC) converter is a three-level voltage-source converter topology that replaces the clamping diodes of the NPC converter with active switches, balancing losses among devices.
Adani Electricity Mumbai
Adani Electricity Mumbai Limited (AEML) is an Indian power utility serving about 3.18 million customers in Mumbai, formed in 2018 from Reliance Infrastructure's Mumbai power business.
Adani Energy Solutions
Adani Energy Solutions, formerly Adani Transmission, is an Indian utility company of the Adani Group that builds power transmission networks, distributes electricity, and installs smart meters.
Adaptive protection (power systems)
Adaptive protection is power system protection in which relay settings are adjusted online to match prevailing network conditions, developed since the 1980s for distribution networks.
Adrian Zaccaria
Adrian Zaccaria was an American engineering executive who spent his 41-year career at Bechtel, rising from nuclear planning engineer in 1971 to president, COO, and vice chairman.
Advanced metering infrastructure
Advanced metering infrastructure (AMI) is the integrated system of smart meters, two-way communication networks, and data management systems that electric utilities use to measure consumption automatically and act remotely.
Aeolian vibration
Aeolian vibration is a high-frequency, low-amplitude oscillation of overhead power line conductors caused by wind flowing across them, and the leading cause of fatigue damage at conductor clamps, countered by Stockbridge dampers.
AEP Ohio
AEP Ohio is the brand of Ohio Power Company, an American Electric Power utility headquartered in Gahanna, Ohio, serving about 1.5 million customers in central and southern Ohio.
AEP Texas
AEP Texas is the transmission and distribution utility subsidiary of American Electric Power, delivering electricity to more than one million meters across south and west Texas without selling the power itself.
AES Corporation
AES Corporation is a Fortune 500 power company headquartered in Arlington, Virginia, founded in 1981, operating electricity generation and utilities across the US and Latin America.
AES Indiana
AES Indiana, formerly Indianapolis Power & Light Company (IPL), is a regulated electric utility serving Indianapolis and central Indiana, renamed in 2021 as a subsidiary of The AES Corporation.
AES Ohio
AES Ohio, the trade name of The Dayton Power and Light Company, is a regulated electric utility headquartered in Dayton, Ohio, serving over 527,000 customers across 24 counties.
Air circuit breaker
An air circuit breaker (ACB) is a circuit breaker that extinguishes its arc in air, used in main distribution switchgear and once common on high-voltage transmission systems.
Air-blast circuit breaker
An air-blast circuit breaker is a high-voltage circuit breaker that interrupts current by blasting compressed air at the arc; invented in 1926, it dominated extra-high-voltage switching until about 1990.
Air-insulated switchgear
Air-insulated switchgear (AIS) is electrical switchgear in which ambient air insulates live conductors from each other and from grounded enclosures, in contrast to gas-insulated switchgear.
Alabama Power
Alabama Power is an investor-owned electric utility headquartered in Birmingham, Alabama, serving roughly 1.5 million customers across much of the state as a subsidiary of Southern Company.
Alden P. Yates
Alden P. Yates was an engineer and construction executive who served as president of Bechtel Group from 1983, succeeding George P. Shultz, and died in 1989.
Alexander Apostolov (Александър Апостолов)
Alexander Apostolov (Александър Апостолов), born 1949 in Sofia, Bulgaria, is a Bulgarian-born American power systems engineer at OMICRON, elected to the US National Academy of Engineering in 2025 for leadership in digital protection and control.