901 articles
Northeast blackout of 2003
The Northeast blackout of 2003 was a cascading grid failure on August 14, 2003, that cut power to about 50 million people in the US and Ontario.
Northern Power Generation Company
Northern Power Generation Company, also called GENCO-III or NPGCL, is a state-owned Pakistani electricity generation company headquartered in Muzaffargarh, Punjab, with about 2,060 MW licensed capacity.
Norwich to Tilbury
Norwich to Tilbury is a proposed 180 km, 400 kV electricity transmission connection by National Grid, running from Norwich Main substation in Norfolk to Tilbury in Essex.
Nova Scotia Power
Nova Scotia Power is a regulated, vertically integrated electric utility serving about 550,000 customers in Nova Scotia, Canada, and providing 95 percent of the province's generation, transmission, and distribution.
NSP-Minnesota
NSP-Minnesota, doing business as Xcel Energy, is a Minneapolis-based utility serving about 1.6 million electric and 0.6 million natural gas customers in Minnesota, North Dakota, and South Dakota.
NSP-Wisconsin
NSP-Wisconsin is a wholly owned utility subsidiary of Xcel Energy, headquartered in Eau Claire, Wisconsin, and renamed in 1924; it serves about 364,000 electricity and natural gas customers.
NSTAR Electric
NSTAR Electric Company is a Massachusetts regulated electric utility doing business as Eversource Energy, serving about 432,000 customers and created by the 1999 merger of BEC Energy and Commonwealth Energy System.
NTPC
NTPC Limited, formerly National Thermal Power Corporation, is an Indian government-owned power company incorporated in 1975; India's largest utility, it generates about 24% of the country's electricity.
OGE Energy
OGE Energy Corp. is an Oklahoma City energy holding company formed in 1997 around Oklahoma Gas and Electric, a regulated utility serving about 913,000 customers across Oklahoma and western Arkansas.
OGK-2
OGK-2, formally PJSC Second Generating Company of the Electric Power Wholesale Market, is Russia's largest thermal power generation company by capacity, with 17,608 MW across 12 regions, controlled by Gazprom Energoholding.
Oglethorpe Power
Oglethorpe Power is a not-for-profit generation and energy asset management cooperative headquartered in Tucker, Georgia, which supplies wholesale power to Georgia's electric membership corporations and co-owns the Vogtle nuclear plant.
Ohio Edison
Ohio Edison Company is an Akron, Ohio-based electric distribution utility serving about 1.1 million customers in central and northeastern Ohio, a founding member of FirstEnergy since 1997.
Oil circuit breaker
An oil circuit breaker is a power circuit breaker that quenches the arc by separating contacts in insulating oil, dominating high-voltage switchgear for most of the twentieth century.
Oil-filled cable
An oil-filled cable is a high-voltage power cable in which paper insulation is impregnated with oil kept under continuous pressure, as self-contained or pipe-type designs.
Oil-filled transformer
An oil-filled transformer, also called an oil-immersed transformer, is an electrical transformer with its core and windings submerged in insulating oil that both insulates and cools.
Old Dominion Electric Cooperative
Old Dominion Electric Cooperative (ODEC) is a not-for-profit wholesale generation and transmission cooperative incorporated in Virginia in 1948, serving 11 member distribution cooperatives that supply about 1.5 million people across Virginia, Maryland, and Delaware.
Omaha Public Power District
Omaha Public Power District is a not-for-profit, customer-owned public electric utility and political subdivision of Nebraska serving Omaha and 13 counties, created by the legislature in 1946.
Oman Electricity Transmission Company
Oman Electricity Transmission Company (OETC) is the owner and operator of Oman's main electricity transmission network and its system operator, formed in May 2005 under Royal Decree 78/2004.
Omexom
Omexom is the energy infrastructure brand of VINCI Energies, part of the French group VINCI, launched in 2000 and covering power generation, transmission, and solar.
OMICRON Electronics
OMICRON Electronics is an employer-affiliation entry covering Alexander Apostolov, a power-system protection engineer and Principal Engineer at OMICRON electronics in Los Angeles since September 2006.
On-load tap changer
An on-load tap changer (OLTC) is a switching device in a power transformer that regulates output voltage in discrete steps while the transformer remains energized and carrying load.
Oncor
Oncor is a regulated electricity transmission and distribution utility headquartered in Dallas, Texas, operating the largest such system in Texas and serving more than 4.1 million homes and businesses.
Onee
Onee (Office National de l'Électricité et du Potable, ONEE) is a Moroccan state-owned utility providing electricity and drinking water, formed in 2012 through a merger.
Ontario Power Generation
Ontario Power Generation (OPG) is the Province of Ontario's largest electricity generator, created in 1999 from Ontario Hydro, operating nuclear, hydroelectric, and gas stations including Darlington and Pickering.
Onward Energy Holdings
Onward Energy Holdings is the holding company of Onward Energy, a private American power producer owning wind, solar, and natural gas plants across the United States.
OPC Energy
OPC Energy is an Israeli independent power producer founded in 2010 as the first private electricity company in Israel, now operating in the United States too.
Optical current transformer
An optical current transformer is a power-system device that measures current via the Faraday effect on polarized light, offering no core saturation and a wide dynamic range.
Optical ground wire
Optical ground wire (OPGW), also called optical fiber composite overhead ground wire, is a metallic cable at the top of transmission towers that shields against lightning while carrying optical fibers, in regular use since the mid-1980s.
Orange and Rockland Utilities
Orange and Rockland Utilities is a regulated electric and gas utility headquartered in Pearl River, New York, serving New York City's northwestern suburbs and northern New Jersey.
Ores (utility)
ORES (Opérateur de Réseaux d'Energies) is a Belgian utility that manages electricity, natural gas, and public lighting networks across about 75 percent of Wallonia's municipalities, serving roughly 1.5 million customers.