elsystem

Elsystem is a term used in several Nordic languages to refer to an electrical or electric power system. It denotes the networks and infrastructure that generate, transmit, distribute, and supply electricity to residential, commercial, and industrial users. In general usage the term can refer to a national or regional electric grid as well as the internal electrical systems within buildings or devices.

Key components include electricity generation facilities such as thermal, hydro, nuclear, wind, and solar power; high-voltage transmission lines and substations; and distribution networks that deliver power at lower voltages to end customers. System operators monitor and balance supply and demand in real time, maintaining grid frequency and voltage within predefined limits to ensure reliability.

Modern elsystems are being digitalized and modernized through smart grids, advanced metering infrastructure, demand-side management, energy storage, and greater integration of intermittent renewable energy sources. These developments aim to improve reliability, efficiency, and resilience against outages and extreme weather.

Governance and regulation vary by country but typically involve national or regional authorities, independent transmission operators, and adherence to technical standards and market rules. The term is widely used in policy and industry discussions about energy security, decarbonization, and modernization of energy infrastructure.

See also: electrical grid, power system, smart grid, energy storage, renewable energy integration.