HomeScience & ExplorationTop 8 Countries by UHVDC Power Transmission Mileage
Top 10Updated 2026年3月16日

Top 8 Countries by UHVDC Power Transmission Mileage

This ranking covers the operating and under-construction UHVDC transmission line mileage globally as of 2026. UHVDC technology is the cornerstone for long-distance, high-capacity power delivery, reflecting a nation's energy infrastructure capabilities and the scale of its ultra-high voltage grid coverage.

Current #1
China

Interesting Facts & Summary

The Race for Energy Arteries

In the field of UHVDC transmission, China holds an absolute global lead, not only by continuously breaking records in transmission distance (e.g., ±1100kV lines) but also by maintaining a grid scale that far exceeds any other nation.

  • Technological Gap: The 800kV and 1100kV UHVDC technologies widely implemented in China have become the industry benchmark.
  • Future Trends: Driven by the global energy transition, nations like Brazil and India are rapidly narrowing the geographic gap between energy production hubs and consumption centers by adopting advanced UHVDC technology.
RankCountryMileage (km)Representative Line / Note
China
58000Possesses the world's most complete UHV network
Brazil
9200Belo Monte UHVDC transmission project
India
7500Raigarh-Pugalur ±800kV link
4
Russia
4500Early DC transmission exploration
5
Canada
3800Hydro-Québec bulk power transmission
6
USA
3200Pacific DC Intertie
7
Norway
1800North Sea subsea DC cables
8
United Kingdom
1500Cross-sea grid interconnection
9
Others (Cluster)
800Small-scale DC interconnects
10
South Africa
600Regional DC pilot project

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