901 articles
Ice shedding
Ice shedding is the sudden detachment of ice from overhead transmission line conductors due to melting, wind, or de-icing, causing jumping conductors, flashovers, and tower damage.
IDACORP
IDACORP is a Boise, Idaho-based holding company formed in 1998 whose principal subsidiary is Idaho Power, a regulated utility serving southern Idaho and eastern Oregon.
IEC 60287
IEC 60287 is a series of IEC standards, Electric cables – Calculation of the current rating, giving formulae for the continuous current, or ampacity, of power cables in ground, ducts, or air.
IEC 60320
IEC 60320, the international appliance coupler standard family (Parts 1, 2-1 to 2-4, 3) from IEC/TC 23/SC 23G, covering detachable inlets and connectors rated up to 250 V AC and 16 A, with the 2021 fourth edition adding Annex E for use up to +90 °C.
IEC 62351
IEC 62351 is a multi-part international standard series defining data and communications security for power system protocols like IEC 61850 and DNP3, first published by the IEC in 2007.
IEEE 1159
IEEE 1159 is an IEEE recommended practice, formally the Recommended Practice for Monitoring Electric Power Quality, that defines terms and categories for sags, swells, and interruptions.
IEEE 1547
IEEE 1547 is the IEEE standard for interconnecting distributed energy resources, including inverters, generators, and converters, with electric power systems, first published in 2003 and revised in 2018.
IEEE 2030
IEEE 2030, formally IEEE Std 2030-2011, is an IEEE standard for smart grid interoperability across power, communications, and information technologies; a revision, project P2030, has been underway since 2023.
IEEE 2800
IEEE 2800 is a 2022 IEEE standard that sets uniform minimum requirements for interconnecting inverter-based resources like solar, wind, and storage plants to transmission systems.
IEEE 519
IEEE 519 is the IEEE standard for harmonic control in electric power systems, first published in 1981 and the principal North American standard for harmonic distortion limits.
IEEE C37.111
IEEE C37.111 is the IEEE standard defining COMTRADE, a file format for storing and exchanging transient waveform and event data from power systems, first published in 1991.
IFA-2
IFA-2, the second France–Great Britain interconnector, is a 1,000 MW high-voltage direct current link between Tourbe in Normandy and Chilling in Hampshire, developed by National Grid and RTE and in commercial operation since January 2021.
Impedance-based fault detection
Impedance-based fault detection, known in practice as distance protection, is a power system protection method that infers a fault's presence, direction, and location from apparent impedance at the relay.
Impedance-based fault location
Impedance-based fault location is the technique of finding where a short-circuit fault lies on a power line by converting measured voltage and current at the line terminals into a distance.
Independent Electricity System Operator
The Independent Electricity System Operator (IESO) is the not-for-profit corporation that operates Ontario's electricity grid, runs its wholesale markets, and plans the province's future electricity supply.
Indiana Michigan Power
Indiana Michigan Power is an investor-owned electric utility in Fort Wayne, Indiana, a subsidiary of American Electric Power serving over 600,000 customers across 30 counties.
Indraprastha Power Generation
Indraprastha Power Generation Company Limited (IPGCL) is the electricity generation company of the Government of Delhi, created on 1 July 2002 when the Delhi Vidyut Board was unbundled.
Inner Mongolia Energy Power Generation Investment Group
Inner Mongolia Energy Power Generation Investment Group (蒙能集团, Mengneng Group) is a state-owned energy company of Inner Mongolia, China, engaged in power generation, coal development, and power engineering.
Inner Mongolia MengDian HuaNeng Thermal Power
Inner Mongolia MengDian HuaNeng Thermal Power (内蒙古蒙电华能热电) is a Chinese power company headquartered in Hohhot, Inner Mongolia, listed in Shanghai and controlled by China Huaneng Group.
Insulation coordination
Insulation coordination is the engineering process of selecting insulation withstand levels and surge-protective equipment, chiefly arresters, so power system equipment survives lightning and switching overvoltages at defensible cost.
Inter RAO
Inter RAO (ПАО «Интер РАО») is a Russian energy holding company, founded in 1997, that serves as Russia's only electricity exporter and importer and operates about 31.2 GW of generation.
Inter-area oscillation
An inter-area oscillation is a low-frequency oscillation in a large power grid where geographically separate generator groups swing against each other across weak transmission links, limiting power transfer.
Interconnection queue
An interconnection queue is the list of proposed power plants and storage projects a transmission operator studies before they connect to the grid, a major bottleneck for solar and wind.
Interharmonics
Interharmonics are voltage or current components in a power system whose frequencies are not integer multiples of the fundamental supply frequency, such as 50 or 60 Hz.
Interline power flow controller
The interline power flow controller (IPFC) is a FACTS device proposed in 1999 that uses shared DC-linked voltage source converters to coordinate power flow on two or more transmission lines.
Intermountain Power Agency
The Intermountain Power Agency is a political subdivision of the State of Utah, organized in 1977, that owns the 1,800 MW Intermountain Power Project serving Utah and California.
Interphase power controller
The interphase power controller (IPC) is a passive FACTS device that controls power flow between AC transmission networks, introduced in 1994 at CITEQ in Varennes, Quebec.
Interstate Power and Light Company
Interstate Power and Light Company is an investor-owned utility headquartered in Cedar Rapids, Iowa, that supplies electricity and natural gas to roughly 490,000 electric and 225,000 gas customers in Iowa.
Invenergy
Invenergy is a privately held American energy company headquartered in Chicago, founded by Michael Polsky in 2001, describing itself as North America's largest privately held independent power producer.
Iraqi Ministry of Electricity
The Iraqi Ministry of Electricity (وزارة الكهرباء) is the government ministry responsible for Iraq's electricity sector, established in 2004 and headquartered in Baghdad, covering generation, transmission, and distribution.