On 22 May 2025, AST announced that, after reviewing the CESI study findings on the LaSGo offshore interconnection between Latvia’s Kurzeme shore and Gotland, AST and Swedish TSO Svenska Kraftnät had agreed on next steps to jointly continue project studies and development, recognising mutual benefits for security of supply and RES integration.
In its Power Transmission System Development Plan 2025–2034, AST reported preliminary LaSGo project costs of about EUR 900 million and noted that, through an intergovernmental agreement with Sweden, the project aims to secure European co‑financing for further surveys and construction, conditional on its inclusion in ENTSO‑E’s TYNDP and the EU PCI list. Earlier planning documents also indicated estimated construction costs of EUR 700 million on the Latvian side, underscoring the scale of the planned investment even though no specific funding awards have yet been granted.
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LaSGo (Latvia–Sweden–Gotland, “LaSGo Link”) is a planned multi‑terminal HVDC subsea interconnection studied and promoted by the Latvian transmission system operator AS Augstsprieguma tīkls (AST) to directly link Latvia with Sweden via an intermediate terminal on the island of Gotland. The project...
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LaSGo, LaSGo Link, Latvia–Sweden–Gotland HVDC, Latvia–Sweden (LaSGo), Latvijas–Zviedrijas LaSGo, Augstsprieguma tīkls LaSGo
As part of the LaSGo initial implementation studies commissioned by AST and carried out by CESI, preliminary HVDC cable routing options for the Latvia–Gotland–Sweden interconnector were defined via a desktop study, identifying three alternative routes between Ventspils (LV), Gotland landfalls (Slite or Visby), and Swedish connection points (Oskarshamn, Kimstad or Glan), with total lengths of 300–450 km to support cost estimation and technical planning. These routing studies were documented in the executive summary published on 4 February 2025, marking completion of this phase of cable route engineering.
On 4 February 2025, AST published the executive summary of the "Latvia–Sweden interconnection initial implementation studies" for the LaSGo HVDC project, presenting the technological, network, market and economic analysis results and recommendations such as adopting VSC technology and a symmetrical monopole configuration.
AST and Italian consultant CESI completed and published the LaSGo initial implementation study, including technological, network and market analyses and a cost-benefit analysis, whose results demonstrated the viability and economic profitability of the planned Latvia–Sweden–Gotland HVDC interconnector for both Latvia and Sweden. The study, carried out in 2024 and presented to stakeholders at the beginning of 2025, assessed route and connection options, required reinforcements, socio‑economic welfare gains, CO₂ reductions and RES integration benefits, and its executive summary was released on 4 February 2025.
During 2024, AST and CESI carried out comprehensive initial implementation studies for the LaSGo HVDC project, including technological configuration, routing options, network impact assessments, market modelling and cost‑benefit analysis, demonstrating the project’s viability and quantifying benefits for Latvia and Sweden.
In 2023, Latvian TSO Augstsprieguma tīkls (AST) signed a contract with Italian energy consultant CESI to initiate the LaSGo HVDC interconnector study, covering dynamic stability calculations, technical implementation options and a cost‑benefit analysis for the planned Latvia–Sweden–Gotland link.
Svenska kraftnät rejected Transmission Invest’s request to connect the LaSGo Link interconnector to the Swedish transmission grid, citing insufficient onshore grid capacity and the risk that, without prior reinforcements along Sweden’s east coast, the connection would deteriorate rather than improve security of supply in southern Sweden; this rejection and its rationale were made public in June 2022 and raised concerns that the mainland Sweden–Gotland section of LaSGo could become redundant.
The LaSGo Link, an HVDC interconnection between Sweden, Gotland and Latvia, was included as a project in ENTSO-E’s Ten-Year Network Development Plan (TYNDP), where it is assigned project ID 1068 with a configuration of a 700 MW interconnector between Sweden and Gotland and a 500 MW interconnector between Gotland and Latvia.
The LaSGo Link, described as the interconnection between Latvia and Sweden via Gotland, was included by the European Commission on the 5th list of Projects of Common Interest (PCIs) under the Baltic Energy Market Interconnection Plan (BEMIP Electricity) priority corridor.
AST reports that the planned Latvia–Sweden interconnection (LaSGo) is mentioned in ENTSO-E’s Offshore Network Development Plan (ONDP) as one of the potential offshore infrastructure projects, recognising it within the EU offshore grid planning framework.
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