Svenska kraftnät

Sweden’s transmission system operator (TSO). A state-owned enterprise (affärsverk) responsible for operating, maintaining, and developing the Swedish high-voltage transmission grid (stamnätet). Also responsible for the real-time balance of electricity supply and demand across Sweden.

Roles

• Grid owner/operator: owns and operates the ~15,000 km transmission grid (220–400 kV)
• System balance: maintains 50 Hz frequency through balancing markets (FCR, aFRR, mFRR). When reserves are insufficient the control room falls back on out-of-market measures — e.g. on 8 June 2026, two simultaneous faults (an SE2↔SE3 line trip + a −500 MW Swe-Pol Link loss, frequency to 49.80 Hz) exhausted all mFRR bids in SE3/SE4, forcing four gas-turbine starts and 200 MW each imported from Lithuania and Norway. (Source - Svk Driftstörningar 8 Juni 2026, Capacity Adequacy and Flexibility as the Missing Reserve › 8 June 2026 — a reserve-exhaustion event in miniature)
• Grid development: plans and executes transmission grid expansion and reinforcement
• Market facilitator: operates the Swedish Bidding Areas (SE1–SE4) and manages cross-border capacity allocation
• Connection authority: processes connection applications for large generation and consumption facilities
• Elberedskapsmyndighet (electricity preparedness authority): responsible for national transmission-based system restoration after large-scale outages; gives support (including cost compensation) to local/regional ö-drift capability at DSO level. Can compensate costs for maintaining capability, planning and testing — but only towards actors within the electricity supply chain. (Source - Svk Om Ö-drift (2025))

Current situation

Svk faces an unprecedented expansion challenge. The energy transition is driving simultaneous needs for:

1. Reinvestment in aging infrastructure (many lines and substations from the 1950s–70s reaching end of technical life) — Svk’s first concrete answer at the station level is the digital substation: station Åker (Strängnäs, commissioned 28 July 2026) replaced an end-of-life station with one running most control functions in networked software rather than hardware, explicitly framed as necessary to keep resource use per station low enough to sustain the historic buildout pace below. Two more (Ockelbo, Lindbacka) are planned. (Source - Svk Digital Substation Åker (2026))
2. System reinforcement to increase north-south capacity (the fundamental Bidding Areas imbalance)
3. New connections for industrial electrification, hydrogen, data centers, offshore wind
4. Market integration via HVDC interconnections with Nordic and European neighbors

The connection queue for input (generation) has accumulated to over 175 GW applied for over 2020–2025, against a Swedish peak load of only ~25 GW. Svk’s own report compares the smaller, already-reduced current queue to peak load and calls it “more than twice as high” — the often-quoted ~7× figure divides the cumulative 2020–2025 applied-for total by peak load, a wiki-derived comparison rather than one the source document itself makes. Even though most applications won’t materialize, it signals enormous demand for grid access.

Svk’s planned investment for 2025–2035: SEK 225 billion, a sharp increase from historical levels of ~5,000 MSEK/year to 25,000+ MSEK/year. (Source - Svk Network Development Plan 2026-2035)

The Verksamhetsplan 2026–2028 (government budget submission) details the near-term tranche: 56,800 MSEK in planned investments for 2026–2028 alone, accelerating from 8,396 MSEK actual in 2024 to 15,400 → 20,200 → 21,200 MSEK per year — a doubling of annual investment expenditure by 2027–2028 versus today’s level. Total investments 2025–2030 reach ~125 billion SEK; including 2031–2035, ~235 billion SEK. Total assets on the balance sheet are projected to grow from ~106 billion SEK (2024) to 161 billion SEK (2030). Svk holds ~52 billion SEK at Riksgälden (Swedish National Debt Office) — accumulated from congestion revenue inflows generally — and expects no new borrowing until 2030. (Source - Svk Verksamhetsplan 2026-2028)

Key initiatives

• NordSyd — flagship program to increase north-south transmission capacity through four parallel branches. The Mellansverige regional NUP (June 2026) details the build-out across Gävleborg, Örebro, Dalarna, Värmland, Västmanland and Uppsala — the four “ben” (Uppsalabenet, Västeråsbenet, Karlstadbenet, Hallsbergsbenet), replacing series-compensated 400 kV lines with non-compensated doubles to enable new station connections — and classifies the region into six connection sub-areas (A–F), tagging all six as suitable for flexibility (in A, D and E the only use named). The defining constraint is north–south transfer over snitt 2. (Source - Svk Regional NUP Mellansverige (2026))
• Gotland connection — new transmission grid connection (two 220 kV AC submarine cables) planned for 2030; sits alongside the existing HVDC connection (per Svk’s 2026 press release); increases capacity and enables further wind generation expansion on Gotland. See Island Operation › Gotland — total defence island operation planning.
• Stockholm package — major system reinforcement for the capital region (SEK 30 billion, the single largest project)
• HVDC interconnectors — see section below; three planned projects paused as of May 2026
• Flow-Based Capacity Calculation — transitioned from NTC in October 2024 for more accurate cross-border capacity allocation
• Centralt datahanteringsverktyg — Svk participates jointly with Ei in a new government assignment (Regeringsbeslut 2025-09-18) to develop a proposal for a central data management tool for the electricity market. Ei coordinates; Svk contributes. This replaces Svk’s 2015 solo mandate (M2015/2635/Ee) to build an elmarknadshubb, which was formally cancelled by the same decision. The joint proposal (Ei R2026:08) was submitted to the government on 30 September 2026: Svk would provide and manage the tool through a wholly owned subsidiary, with the government deciding next. (Source - Uppdrag Centralt Datahanteringsverktyg (2025), Source - Ei R2026-08 Förslag Centralt Datahanteringsverktyg (2026), Elmarknadshubb)
• LT50 — Lead Time 50%: Svk’s strategic programme to halve project lead times across the entire investment portfolio. Identified as critical for matching Svk’s unprecedented investment pace (225 billion SEK, 2026–2035) with the speed at which electricity demand is growing. Tools include: regional dialogue units in all 21 counties, strengthened interaction with county boards/municipalities/regions, new internal roles and working methods, standardisation, and supply chain partnerships. Announced in Svk’s Strategi mot 2030 (2026) as part of the “Elnät i takt med behov” shift area (“halve project lead times”). (Source - Svk Strategi mot 2030 (2026), Source - Nationell Dialog Flexibilitet Nätkapacitet 12 Maj 2026) The wider stakes are quantified in Energiforsk’s NEPP lead-time study: permitting and grid connection are the key bottlenecks, and Sweden already carries an investeringsskuld (a shortfall of initiated projects relative to the 2045/300 TWh scenario pathways) that even large lead-time cuts only partly close — see Source - Energiforsk 2026-1185 Ledtider för Energiomställningen (2026), Long-Term Market Analysis › Planeringsscenario — Svk’s expanded planning mandate.

Strategy 2030

Svk published its strategic direction document in January 2026, setting out priorities through 2030. (Source - Svk Strategi mot 2030 (2026))

Vision: Ett hållbart och lysande Sverige. Three verksamhetsmål: trygg elförsörjning (including the riksdagsmål of ≥300 TWh by 2045 and the leveranssäkerhetsmål); samhällsekonomisk effektivitet och konkurrenskraft; klimatneutralt och hållbart samhälle.

Five förflyttningsområden (strategic shift areas):

The strategy explicitly identifies flexibility and storage as increasingly important and commits to developing new incentive mechanisms for system capabilities in a more volatile system. The investment level is described as historically high — from ~5,000 MSEK/year to 25,000+ MSEK/year.

V2G and the physical address requirement

Svk requires all ancillary service providers (BSPs) to register a physical address for each resource participating in the balancing market. This requirement — designed for fixed generation and load assets — creates a structural barrier for Vehicle-to-Grid resources. An EV is inherently mobile; it cannot maintain a single registered location while providing grid services from multiple places (e.g., home, workplace, VW dealership) without re-registering each new location.

In practice, this limits V2G ancillary service participation to a single fixed discharge location per vehicle registration — constraining the mobile use case that is one of V2G’s theoretical advantages over stationary storage. (Source - Power Circle V2X Synthesis 2024, Source - KTH Thesis V2G Sweden 2024)

Svk’s 100 MW minimum threshold for BSP participation in ancillary services (FCR, aFRR, mFRR) is a related barrier: individual EV owners cannot reach this threshold alone. Aggregation via an aggregator or OEM fleet portfolio is required. See Vehicle-to-Grid › Ecosystem actors for the OEM fleet aggregation strategic opportunity.

Elområdesindelning — government assignment (due January 2027)

The government assigned Svk in May 2025 (KN2025/01072) to analyze the prerequisites for changing Sweden’s four-area bidding zone structure. The assignment was amended on 28 May 2026 (Regeringsbeslut I:9, KN2026/01206), extending the deadline and substantially expanding the scope. (Source - Ändring Uppdraget Svk Elområdesindelning (2026))

The expanded assignment now includes:

• Analysis of three zone configurations (single zone / two zones at Snitt 2 / ACER alternative) plus export zone concept
• A formal rapport om strukturell överbelastning under Art. 14.7 of Regulation (EU) 2019/943 — the document that can trigger the binding EU bidding zone change process if approved by Ei (starts a 12-month clock)
• A holistic 5–10 year recommendation on the most appropriate zone structure
• If more than 2 areas are recommended: a concrete, timed action plan toward a 2-area structure (reflecting the Tidöavtalet goal of Sweden eventually becoming a samlat elprisområde)

Deadline: 29 January 2027 (extended from original 29 May 2026). See Bidding Areas for full context on the EU BZRR background, the four alternative configurations studied, and the Art. 14.7 process.

Grid planning and connection

Svk’s transmission build-out and connection work — the paused HVDC interconnector projects and the revised 2027–2029 investment plan, the anvisningssystem connection-process reform and kapacitetskartan, the localization principles and the national målnät 2045, the LMA2026 long-term market analysis, and the kapacitetsåtgärder TSO–DSO connection bridge — is treated in Svk Transmission Grid Planning. It was split out from this page because those sections had grown into a distinct sub-topic: how the grid gets planned and built, as opposed to how Svk operates the market on it.

Civil defense — civilplikt

Svk is activating civilplikt (civil duty) within electricity supply under a government mandate to train and assign 1,000 civil duty personnel by 2028. This creates a reserve workforce for electricity supply under heightened preparedness and wartime conditions.

Cost profile: ~33.6 MSEK (2025), rising to ~58.8 MSEK/year (2026–2028). Civilplikt personnel are assigned to specific roles within the electricity supply chain and can be mobilised during crises or war. (Source - Svk Verksamhetsplan 2026-2028)

Related investments: transformer protection hardening, mobile distribution stations, cybersecurity training for industrial control systems, and regional ö-drift capability. The military-civil dual-use capability target (robusthet, reparationsberedskap, ö-drift) — electricity supply must resist, manage, and recover from disturbances, crises, and wartime conditions — underlies much of Svk’s current operational security investment.

ERAA 2025 scenarios — Svk’s FNA system needs input

Svk uses the ERAA 2025 (European Resource Adequacy Assessment, ENTSO-E) National Trends / Central Reference Scenario as the basis for the system-level component of the Flexibility Need Assessment. Svk’s national input data was derived from KMA2024 and LMA2024.

Sweden installed generation capacity (MW; 2026 figure is KMA2025, 2030/2035 are ERAA2025): hydro 16,416 → 15,617 → 15,617; wind 16,134 → 20,726 → 26,152; nuclear 6,981 → 6,981 → 8,081; solar 5,583 → 6,863 → 10,079 (2026 → 2030 → 2035). Wind overtakes hydro as the largest technology by 2035; solar grows proportionally the most (+80%):

Electricity demand and DSR (ERAA 2025, 2030/2035):

• Total Sweden: 177 TWh (2028; 2030 not reported in source), 204 TWh (2035)
• DSR national: 2,287 MW (2030) → 4,465 MW (2035)
• Batteries: 8,077 MW (2030) → 15,503 MW (2035)

DSR by bidding area (post-EVA):

• SE1: 300 MW (2030) → 1,090 MW (2035)
• SE2: 210 MW (2030) → 920 MW (2035)
• SE3: 2,970 MW (2030) → 5,240 MW (2035) — dominant share, consistent with SE3’s population/industry
• SE4: 680 MW (2030) → 1,220 MW (2035)

These are scenario assumptions, not targets. (Source - FNA Webinar 7 (2026-03-16))

FNA role

Svk is the national aggregator for the Flexibility Need Assessment (FNA). The reporting chain runs: lokalnät → regionnät → Svk → ACER + European Commission. Svk compiles the national picture, performs TSO-level analysis, and is responsible for the market barriers and digitalization evaluation (coordinating a survey across DSOs and flexibility providers).

In the first FNA cycle (2026), Svk and Ei agreed that Svk will not report transmission network flexibility needs — this is deferred to FNA 2028 due to insufficient methodology maturity. The FNA 2026 therefore covers only distribution-level needs.

Svk also has a data provision role: it must inform overlying regionnät (and through them, lokalnät) about the indicative capacity at connection points for target years 2030 and 2035 — the capacity indications that DSOs need to assess their own flexibility requirements. (Source - FNA Överenskommelse Svenskt genomförande 2026 (2025))

BRP and BSP agreements

Svk’s BRP agreement (Avtal 5938) and BSP agreement (Avtal 5937) — contract terms, fee structure, the Strategisk reserv surcharge, and the Art. 18 “paper construction” cross-BRP bidding limitation — are covered in detail on BSP and BRP Roles › Contract terms — Avtal 5937 (BSP) and Avtal 5938 (BRP). The 2025 strategic reserve procurement failure (CONE methodology) is covered on Strategisk Reserv.

Transmission network charge

Svk sets the charge that producers and grid companies with a subscription point on its 400 and 220 kV network pay (transmissionsnätsavgiften). From 1 January 2027 it has four components (fixed fee, energy fee, customer-specific fee, power fee); the board decided the model on 19 February 2026 and the 2027 price list in September 2026, with congestion income cutting the tariff by billions of SEK. See Transmission Network Charge.

Flaskhalsinkomster (congestion income)

Svk receives substantial annual congestion income from price differences between the four Swedish bidding zones and at cross-border interconnectors — projected accumulated balance ~90.9 GSEK at end-2027 (conditional on Ei approving the tariff reduction), ~14.7 GSEK expected inflow in 2027 alone. Ei approves Svk’s proposed use annually (under the ACER methodology implementing Art. 19.4, Regulation (EU) 2019/943): countertrading, överbelastningshantering, reactive power, EPAD support, Nordic RCC implementation, co-funded network investment, Kraftsystemhubben, and a direct tariff reduction. The May 2026 HVDC interconnector pause is partly driven by EU nätpaketet restrictions on how this income can be used, and Kommittédirektiv 2026:83 floats a further possible use — Svk buying regional grid lines from DSOs. Full breakdown, figures, and sourcing at Flaskhalsinkomster.

Capacity adequacy — Uppdrag 3.1 (June 2026)

Svk’s capacity adequacy report (Uppdrag 3.1 in its 2026 regleringsbrev), the volume gap between what ERAA2025 requires and what’s actually procurable, the überbelastningshantering and outside-ERAA bridge measures, and why Ei’s autumn 2026 reliability-norm review is the single most consequential near-term decision for Swedish adequacy, are covered in full at Capacity Adequacy and Flexibility as the Missing Reserve › Uppdrag 3.1 — quantifying the volume gap and bridge measures. (Source - Svk Uppdrag 3.1 Leveranssäkert Elsystem (2026))

Forskning och innovation — Uppdrag 3.5 (2026)

Svk is legally mandated to promote R&D under Förordning (2025:782) (new Svk instruction replacing the older förordning). The 2026 regleringsbrev included assignment 3.5 requiring Svk to report on research significance, Energimyndigheten utilization, and complementarity between the two funding streams. (Source - Svk Forskning Uppdrag 3.5 (2026))

Budget:

• ~30 mnkr/year in fee-funded R&D (from transmission network customers and balance responsible parties)
• ~6–7 mnkr/year dam safety (anslagsfinansierat)
• ~4–6 mnkr/year electricity preparedness (anslagsfinansierat)

Four R&D areas: Nätteknik, hållbarhet och säkerhet; Elmarknad; Systemutmaningar; Digitalisering.

Key results relevant to this wiki:

• AI-based forecasting: implemented as operational decision support in the control room — wind, consumption, and rotational energy (inertia) forecasts enable proactive reserve activation and shift from reactive to predictive system operation
• FCR market design: external market-design and machine-learning research influenced FCR design and implementation timing
• Dynamic Line Rating (DLR): weather-based capacity assessments shown to give a better basis than static assumptions; the report does not state whether DLR is operationally deployed
• Power flow controllers: analysis shows potential to relieve bottlenecks without new lines; pilot studies recommended
• Energilager for transmission capacity: useful as complement but cannot replace grid investment as general solution — value is highly location-dependent
• Flexibility methods: explicitly named as R&D priority — identifying, valuing, and activating flexibility resources; market model development across timehorizons and geographic scales

Energimyndigheten relationship: The report identifies that externally funded research (Energimyndigheten) is not systematically utilized within Svk. Recommended: structured dialogue on research needs, Svk role in shaping Energimyndigheten program calls, more active participation in strategic investments. The two streams are complementary — Energimyndigheten covers broad knowledge development and demonstration; Svk covers operational translation and system-specific implementation.

International cooperation: ENTSO-E RDIC (Research, Development and Innovation Committee); Nordic R&D Group (SE/NO/FI/DK TSOs); CIGRE; Energiforsk (Svk is part-owner).

Relevance to flexibility

Svk’s grid development timelines are long (10–15 years for major projects), and demand for grid access is growing much faster than the grid can be built. This creates the structural need for Flexibility:

• Congestion management between bidding areas — until NordSyd and other reinforcements are built, flexibility must help manage the north-south bottleneck
• Conditional connection agreements — Svk explored TSO-level equivalents of Villkorade Avtal but found full-scale implementation impossible with current systems and tools, highlighting the digital infrastructure gap
• Hydrogen co-planning — co-locating flexible hydrogen production with northern generation could reduce the need for south-bound transmission
• Coordination with DSOs — Svk and DSOs may need flexibility from the same resources, creating coordination challenges that regulation must resolve

(Source - Svk Network Development Plan 2026-2035)