Selecciona tu región e idioma

Global
Argentina
Australia
Austria
Bahrain
Brazil
Bulgaria
Canada
Chile
China
Colombia
Czech Republik
Denmark
Egypt and North Africa
Finland
France
Germany
Greece
Hungary
India
Indonesia
Iraq
Ireland
Italy
Japan
Jordan
Kuwait
Malaysia
Mexico
New Zealand
Norway
Oman
Pakistan
Panama
Peru
Philippines
Poland
Portugal
Qatar
Saudi Arabia
Singapore
Slovakia
South Africa
South Korea
Spain
Sweden
Switzerland
Taiwan, China
Thailand
Türkiye
Ukraine
United Arab Emirates
United Kingdom
United States
Vietnam
English
Spanish
English
German
English
Portuguese
English
English
French
Spanish
Chinese
Spanish
English
English
English
English
French
German
English
English
English
English
English
Italian
Japanese
English
English
English
Spanish
English
English
English
Spanish
Spanish
English
Polish
English
English
English
English
English
English
English
Spanish
Swedish
German
French
Italian
English
English
English
English
English
English
English
English

Menú

SEL000315
Customer Success Story

Gotland HVDC Light®

The Swedish island of Gotland is also the site of the world's first commercial HVDC Light® transmission. HVDC Light® is based on voltage-source converter (VSC) technology, which uses IGBTs (Insulated Gate Bipolar Transistors) to convert electrical current from AC to DC.


Breezy southern Gotland was an early favorite for wind power plants. By the late 1990s the island had installed wind power capacity of 40 MW. But to cope with additional wind generation capacity, the island grid needed an improved way to maintain power quality. In addition, there were great difficulties in getting the necessary permits to build an additional overhead transmission lines.

HVDC Light® power transmission solved the problem with its ability to overcome power quality problems inherent in wind power generation, and to transmit the power via underground cables. This encouraged the local utility GEAB to decide to build the world’s first commercial HVDC Light® transmission. GEAB is a subsidiary of Vattenfall AB, who financed the project together with the Swedish National Energy Administration.

The transmission link between the southern part of Gotland and the city of Visby is rated 50 MW and was put into operation in June 1999. Two 70 km long extruded 80 kV HVDC Light® underground cables, buried close to each other, connect the stations. All equipment was mounted in enclosed modules in the factory and fully factory tested, so that civil works, installation and commissioning time was kept to a minimum.

Gotland HVDC Light upgrade project will be done in 2024 and include complete HVDC control equipment replacement.

Main data
Commissioning year: Upgrade: 2024
1999
Configuration: Symmetrical monopole
Power rating: 50 MW
Direct voltage: ±80 kV
Application: Interconnecting grids