Elia Group SA (Elia), formerly Elia-System Operator SA is primarily engaged in electricity transmission. The company also provides consulting services to international customers through its subsidiary Elia Grid International. Elia Group has developed projects such as the hybrid interconnector that links Germany to Denmark and Belgium's artificial energy island in the North Sea.

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Elia continuously explores innovations to address the operational and technical challenges arising from the evolving energy system. The company’s R&D activities are focused on system operations, infrastructure and asset management, markets and flexibility, and offshore energy, with the objective of maintaining grid stability while enabling higher penetration of renewable energy. In system operations, Elia focuses on developing and testing solutions that support secure grid operation under increasing variability from renewable generation. In infrastructure and asset management, R&D efforts are directed toward improving the performance, resilience, and lifetime management of existing grid assets while supporting the development of future transmission infrastructure. In markets and flexibility, the company works on solutions to enable demand-side flexibility and improve system balancing as renewable generation increases. In offshore energy, Elia focuses on developing and validating technologies and system concepts to support the integration and transmission of offshore wind power to onshore grids. R&D activities are carried out through dedicated teams, including the Innovation Team, Consumer Centricity Team, and Offshore Departments within Elia and 50Hertz. These teams are responsible for testing new technologies, validating operational use cases, and supporting the planning, development, and operation of offshore transmission infrastructure.