Coreso’s mission is to proactively help TSOs to ensure security of supply on a European regional basis. To ensure in its mission, Coreso interacts with numerous stakeholders.


Our shareholders


50hz50hertz ensures the operation, maintenance, planning and demand-based development of its transmission grid. It is responsible for the proper management of the entire electricity system in the German federal states of Berlin, Brandenburg, Hamburg, Mecklenburg-Western Pomerania, Saxony, Saxony-Anhalt and Thuringia.


Since 2006, EirGrid has operated and developed the national high voltage electricity grid in  Ireland. EirGrid is a state-owned company. EirGrid is independent from ESB. We operate the flow of power on the grid and plan for its future, while ESB networks is responsible for carrying out maintenance, repairs and construction on the grid. The grid moves wholesale power around the country. We bring energy from generation stations to heavy industry and high-tech users. We also supply the distribution network operated by ESB Networks that powers every electricity customer in the country.



eliaElia is Belgium’s transmission system operator and is responsible for the transmission of electricity. Elia owns all of Belgium’s 150-380-kV grid infrastructure and almost 94% of its 30-70-kV grid infrastructure.


National Grid ESO

national-gridNational Grid ESO : The Electricity System Operator (ESO) is a legally separate business within the National Grid Group. The ESO became a legally separate entity within the National Grid Group on 1st April 2019. Separating the ESO business from National Grid Electricity Transmission provides transparency in decision-making and gives confidence that everything they do will promote competition and is ultimately for the benefit of consumers.



On January 29th, 1985, Red Eléctrica de España was born – the first company in the world exclusively involved in electricity system operation and transport. It all started with a high-voltage electricity line 10,500 km long. Now, 30 years later, that network stretches to more than 42,000 km with a workforce of over 1,700 people. Our objective is to guarantee the safe and continuous supply of electricity throughout Spain, and to develop a reliable transport network to support social progress. It’s an objective that we’re as committed to today as we’ve always been.



REN – Redlogo RENes Energéticas Nacionais is responsible for operating, maintaining and developing the transmission in very high voltage electricity and overall technical management of the Portuguese National Electricity System. They are also responsible for the transport of high-pressure natural gas and overall technical management of the Portuguese National Natural Gas System, guaranteeing the reception, storage and regasification of LNG and underground storage of natural gas.



   RTE is the company responsible for operating, maintaining and developing the French electricity transmission network.



SONI is the electricity System Operator for Northern Ireland. From our control centre in Belfast, we ensure that power flows where and when needed. We bring power from those who generate energy, and supply the distribution network that brings power to individual homes, farms and businesses. Since 2014, SONI is responsible for planning for the future of the grid, while Northern Ireland Electricity Networks is responsible for maintenance, repairs and construction of the grid.



ternaThe Terna Group was the first independent operator in Europe and is the seventh largest in the world in terms of number of kilometers of operated lines. It is also the primary owner of Italy’s National High Voltage Electricity Transmission Grid, with over 62,000 km of HV lines throughout Italy. Terna is responsible for nationwide energy transmission and dispatching and so for the safe management of energy flows across Italy, guaranteeing the balance between electricity supply and demand 24/7.


Others RSCs


Baltic RSC

Baltic RSC is a grid security cooperation initiative set up by three Baltic TSO-s.


Nordic RSC

The Nordic Regional Security Coordinator (RSC) is the joint office for the four electricity Transmission System Operators (TSOs) in the Nordic region. The RSC supports the national TSOs in maintaining the operational security of the power systems across Finland, Norway, Sweden and Denmark.



intro-00Security Coordination Centre SCC, Ltd Belgrade (SCC) is the first Regional Security Coordination Initiative (RSCI) in the Southeast Europe (SEE), established as a company. SCC’s objective is to develop necessary services defined by ENTSO-E’s Policy Paper „Future TSO Coordination for Europe” and by Multilateral Agreement on Participation in Regional Security Coordination Initiatives (MLA) in order to fulfill operational planning standards which will be defined by the European NC/GL.



TSCNET Services GmbH is TSC’s service company. It develops new cooperation tools for control centres and provides integrated services for them – 24 hours a day, seven days a week.


Relevant links


entsoeENTSO-E is the European Network of Transmission System Operators for Electricity, founded in December 2008. ENTSO-E coordinates the cross-border system operations, system development and electricity market activities of 42 TSOs from 34 countries.


apxAPX Group is a joint energy exchange for the UK and the Netherlands operating the spot markets for electricity in the Netherlands, the United Kingdom and Belgium.


JAO logoThe JAO is a joint service company of twenty Transmission System Operators (TSOs) from seventeen countries*. It will mainly perform the yearly, monthly and daily auctions of transmission rights on 27 borders in Europe and act as a fall-back for the European Market Coupling.


epexThe European Power Exchange is an exchange for power spot trading in Germany, France, Austria and Switzerland.