Fenno–Skan is the designation of the high voltage direct current transmission between Dannebo in Sweden and Rauma in Finland.
thumb|Fenno-Skan HVDC power line, running over Turku-Pori route in Finland. Unlike in 3-phase AC power transfer, only two wires instead of three are required (in addition to the lightning protection wires, which on the Finnish side serve as electrode line).
History
Fenno–Skan was inaugurated in 1989.
Description
The Fenno–Skan is a monopolar system with a maximum transmission rate of 550 megawatts (MW) at a voltage of 400 kV. It would be converted to become a bipole. Two converter stations were supplied by ABB. Compare with Fenno–Skan 1, the Swedish converter station is located in Finnböle. The Fenno–Skan 2 cable is connected to the converter station by a long DC overhead line. The pylons of this line are "classic HVDC pylons" with a single crossbar carrying two conductors, which consist of a bundle of three or four ropes, on long insulators, on the Finnish side. On the Swedish side, the towers carry the pole conductor (long insulators) and the neutral conductor (short insulators) from Finnböle to the Dannebo (Fenno-Skan 1) converter station.
Fenno–Skan 2 crosses the traction current power line Tierp-Gävle and the parallel-running three phase 220 kV AC powerline Mehedeby-Gävle west of Mehedeby approximately at . This is the only crossing of an HVDC powerline and a single-phase AC powerline in the world and the only place where all kinds of electric transmission systems, three phase AC powerline, single phase AC powerline and HVDC come close together.
In February 2012 a German ship laid anchor on top of the cable, damaging it. The cost to Finnish consumer and industry in the following two months in higher electricity prices was estimated to be 80 million €.
Sites
{| class="wikitable sortable" style="float:left"
|- bgcolor="#dfdfdf"
! Site
! Coordinates
|-
| Finnböle HVDC Static Inverter ||
|-
| Dannebo HVDC Static Inverter ||
|-
| Hallen Electrode Line Terminal (Sweden) ||
|-
| Rihtniemi Cable Terminal (Finland) ||
|-
| Lautakari Electrode Line Terminal (Finland) ||
|-
| Ruokalho Electrode Line Branch (Finland) ||
|-
| Rauma HVDC Static Inverter Plant ||
|}
Waypoints
; Fenno–Skan 2 in Sweden
; Underground cable in Sweden
; Electrode line in Sweden
; Overhead line in Finland
; Electrode line in Finland
See also
- Energy in Finland
- Energy in Sweden
- List of high-voltage transmission links in Sweden
- Estlink, cable between Estonia and Finland
- LitPol Link, cable between Lithuania and Poland
References
External links
- https://web.archive.org/web/20070221180533/http://www.fingrid.fi/uploads/ConstructionSiteMap/attachments/esite.pdf
- https://web.archive.org/web/20110720015135/http://www.fingrid.fi/uploads/ConstructionSiteMap/attachments/fenno-skan_fin.pdf
- THE FENNO - SKAN SCHEME www.transmission.bpa.gov
- Fenno Pictures www.transmission.bpa.gov
- Overhead line of Fenno-Skan 2