Stamnätsdel

Stamnätsdel is a term used in Sweden to describe a defined part of the national transmission network (stamnätet). It designates the backbone portion of the electricity grid that carries large-scale energy over longer distances and interconnects major regional networks and cross-border links. The exact delineation of a stamnätsdel can vary with regulatory and planning documents, and may change as the grid is developed.

A stamnätsdel typically includes high-voltage transmission lines, major substations and switching installations, and the associated equipment necessary for long-distance transfer of electricity. It serves to enable reliable long-range transfer, facilitate market access, and manage cross-regional and cross-border energy flows.

Ownership and control: In Sweden, these assets are owned and operated by the transmission system operator (TSO), primarily Svenska Kraftnät, though the precise ownership structure can involve agreements with other entities. Regulation and market access: Access to the stamnätsdel is regulated; tariffs for use of the backbone grid are set by the regulatory authority in line with European Union energy market rules; the separation of transmission from distribution is required by law.

Relation to other networks: The stamnätsdel sits between the generation and regional/or distribution networks. Planning, maintenance, and expansions are coordinated in the overall grid development plan to ensure stability and resilience of the national grid.

Etymology and usage: The term combines stamnätet (backbone network) with del (part or segment) and is used primarily in regulatory, planning, and technical contexts within the Swedish electricity system.