HVDC > HVDC References > Europe > Konti-Skan
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The Scandinavia - Northern Europe interconnections
Vester Hassing station in Denmark with pole 2 (thyristor valves) in the foreground and old pole 1 (mercury-arc valves) in the background. | The first interconnection between Sweden and the western grid in Denmark was established in 1965 with the 250 MW Konti-Skan HVDC link across the Kattegatt from Gothenburg to Aalborg. The converter stations were based on mercury-arc valve technology and situated in Stenkullen and Vester Hassing respectively. In 2006 the mercury-arc |
converters were replaced by thyrisor converters.
A second Konti-Skan cable rated 300 MW was added in 1988 from Lindome on the Swedish side to Vester Hassing.
Both poles of Konti-Skan have been testing ground for new ABB HVDC developments:
Pole 1:
1973: Second generation thyristor test valve
(photo), 135 kV, 1,050 A (air cooled) in Vester Hassing.
1988: Light triggered thyristor (LTT) test valve
(photo), 135 kV, 1050 A in Vester Hassing.
1992: The world's first air insulated outdoor thyristor valve
(photo), 135 kV, 1,050 A, in Stenkullen.
Pole 2:
1991: The world's first active DC filter
(photo) in Lindome.
1993: The world's first electronically controlled AC filter ,Contune,
(photo) in Lindome.
| Main data | Pole 1
(decommissioned) | Pole 2 |
| Commissioning year: | 1965 | 1988 |
 | | |
| Power rating: | 250 MW | 300 MW |
| | |
| No. of poles: | 1 | 1 |
| | |
| AC voltage: | 130/150 kV | 400 kV (both ends) |
| | |
| DC voltage: | 250 kV | 300 kV |
| | |
| Length of DC submarine cables: | 87 km | 88 km |
| | |
| Length of DC overhead line: | 86 km | 61 km |
| | |
| Main reason for choosing HVDC: | Length of sea crossing | Length of sea crossing |
| | |