National Grid plc is a British multinational electricity and gas utility company headquartered in London, England. Its principal activities are in the United Kingdom, where it owns and operates electricity and natural gas transmission networks, and in the Northeastern United States, where as well as operating transmission networks, the company produces and supplies electricity and gas, providing both to customers in New York and Massachusetts.
A transmission system operator (TSO) is an entity entrusted with transporting energy in the form of natural gas or electrical power on a national or regional level, using fixed infrastructure. The term is defined by the European Commission. The certification procedure for transmission system operators is listed in Article 10 of the Electricity and Gas Directives of 2009.
A distribution network operator (DNO), also known as a distribution system operator (DSO), is the operator of the electric power distribution system which delivers electricity to most end users. Each country may have many local distribution network operators, which are separate from the transmission system operator.
Alcatel–Lucent S.A. was a multinational telecommunications equipment company, headquartered in Boulogne-Billancourt, France. It was formed in 2006 by the merger of France-based Alcatel and U.S.-based Lucent, the latter being a successor of AT&T's Western Electric and a holding company of Bell Labs.
TenneT is a transmission system operator in the Netherlands and in a large part of Germany.
Energinet is the Danish national transmission system operator for electricity and natural gas. It is an independent public enterprise owned by the Danish state under the Ministry of Climate and Energy. Energinet has some 1150 employees, and its headquarters are located in Erritsø near Fredericia in Jutland. The gas division is located in Ballerup near Copenhagen.
Terna S.p.A. is a transmission system operator (TSO) based in Rome, Italy. It operates through Terna Rete Italia, that manages the Italian transmission grid and Terna Plus which is in charge of new business opportunities and non-traditional activities in Brazil, Chile, Peru and USA (2022). With 74,910 kilometres (46,550 mi) of power lines or around 98% of the Italian high-voltage power transmission grid, Terna is the sixth largest electricity transmission grid operator in the world based on the size of its electrical grid. Terna is listed on the Borsa Italiana and is a constituent of the FTSE MIB index.
Réseau de Transport d'Électricité, usually known as RTE, is the electricity transmission system operator of France. It is responsible for the operation, maintenance and development of the French high-voltage transmission system, which at approximately 100,000 kilometres (62,000 mi), is Europe's largest.
Elektroprivreda Crne Gore AD is an integrated electricity company located in Niksić, Montenegro. The company is listed at Montenegro Stock Exchange with majority of shares owned by the government. Rest of the shares are traded at the Montenegro Stock Exchange.
Elering AS is a national transmission system operator for electricity and natural gas with headquarters in Tallinn, Estonia. The managing director of Elering is Taavi Veskimägi.
Elia is a Belgian transmission system operator for high-voltage electricity, located in Brussels, Belgium. It operates in Belgium and Germany. The company transmits electricity from generators to distribution system operators, which then supply SMEs and homes. Elia also has contracts with major industrial users that directly connect to its high-voltage grid.
50Hertz Transmission GmbH, formerly named Vattenfall Europe Transmission, is one of four transmission system operators for electricity in Germany, and is wholly owned by Eurogrid GmbH, indirectly owned and managed by the Belgian transmission system operator Elia System Operator and Australian-based IFM Investors. The company is a member of the European Network of Transmission System Operators for Electricity (ENTSO-E).
Denmark's western electrical grid is part of the Synchronous grid of Continental Europe whereas the eastern part is connected to the Synchronous grid of Northern Europe via Sweden.
Italy's total electricity consumption was 302.75 terawatt-hour (TWh) in 2020, of which 270.55 TWh (89.3%) was produced domestically and the remaining 10.7% was imported.
The Malta–Sicily interconnector is the submarine power cable which connects the power grid of Malta with the Italian Transmission Network managed by Terna, which is part of the European grid. It was constructed in 2014-2015, and supplies roughly 1⁄4 of Malta's electrical power.
CESI - Centro Elettrotecnico Sperimentale Italiano "Giacinto Motta" is a company that provides testing and certification services, energy consultancy, engineering and technology consulting for the electricity sector worldwide. CESI is headquartered in Milan, Italy and was founded in 1956. It currently has offices and laboratories in five continents and over 70 countries.
Elektromreža Srbije is a Serbian national transmission system operator company with the headquarters in Belgrade, Serbia.
Independent Power Transmission Operator S.A. is the Transmission System Operator for the Hellenic Electricity Transmission System. The mission of the company is the operation, control, maintenance and development of the national transmission system of Greece to ensure the reliable and efficient electricity supply, as well as the operation of the electricity market following the principles of transparency and equality.
Scottish and Southern Electricity Networks is one of two energy companies in the UK to be involved both in electricity transmission and distribution.
