Limits RegistryPUBLIC RECORD
Limits RegistryBuilt jointly by Denmark's Energinet and Britain's National Grid, Viking Link lets the two countries' grids trade surplus renewable generation (particularly Danish wind power) across the North Sea. The record for longest interconnector has shifted repeatedly in recent years as European grid operators have built a series of increasingly long HVDC subsea links to help balance renewable generation across the continent, so the current record is likely to be surpassed again as newer, longer interconnectors are completed.
The question, scope, and sources behind this Registry record.
Built jointly by Denmark's Energinet and Britain's National Grid, Viking Link lets the two countries' grids trade surplus renewable generation (particularly Danish wind power) across the North Sea. The record for longest interconnector has shifted repeatedly in recent years as European grid operators have built a series of increasingly long HVDC subsea links to help balance renewable generation across the continent, so the current record is likely to be surpassed again as newer, longer interconnectors are completed.
Viking Link, a 1,400 MW HVDC interconnector between Denmark and the United Kingdom that entered commercial operation in December 2023, runs 765 km in total length (approximately 650 km of which is subsea), making it the longest land-and-subsea electricity interconnector in the world, surpassing the previous record held by the Norway-UK North Sea Link (720 km, commissioned 2021).
Change a parameter to stress-test whether a proposed result is still inside the published specification. This is an audit aid, not a proof checker.
This record has no editable parameters. Read the formal question and assumptions before challenging it.
Current frontiers derived from accepted Claims.
An observed or demonstrated result; no opposing bound is implied.
The frontier is not sacred
Most progress starts with a disagreement that survives contact with evidence. If you can push the known lower bound up or pull the upper bound down, show us the work.
≥ when you have shown that at least this value is achievable.≤ when you have shown that anything above this value is impossible.No vibes. State the value, define the scope, and link the paper, proof, code, or reproduction that lets another person check it. Editors review every challenge before the public record changes.
Challenge this recordAssertions tied to evidence, attribution, and review.
The frontier as it changed over time.
Only accepted Claims matching the current specification contribute to the displayed bounds. Strict inequalities remain open; contradictory Claims require editorial review.
1 accepted Claim, with 1 linked evidence records.
Permanent ID limitsregistry.com/limits/LR-VIKING-LINK-INTERCONNECTOR
No active verified bounties are linked to this Limit.
View verified bounty tracker ↗No accepted machine-checked reproductions are recorded for this Limit.
Limits Registry. LR-VIKING-LINK-INTERCONNECTOR. Viking Link — world's longest land-and-subsea electricity interconnector. 2026.