Konti-Skan
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Kontiskan (also Konti-Skan) is the name of high-voltage direct-current transmission line between Denmark and Sweden. The 1965-built Kontiskan 1, which was able to transmit an up to 250 megawatts of power with an operating voltage of 250 kV, was taken out of operation and was disconnected on 15 August 2006. The 1988-built Kontiskan 2 can transmit 300 megawatts with a voltage of 285 kV. While Kontiskan 1 used mercury vapor rectifiers in the static inverter plants, Kontiskan 2 uses thyristors.
On the Danish side the static inverter plant of Kontiskan 2 is close to Vester Hassing near Aalborg. From Vester Hassing a 34 km long, two-pole overhead line with the high voltage poles of Konti-Skan 2 to the cable beginning at the Danish coast near Staesnaes, while two 27 km long underground cables transfer the current of the other poles of Konti-Skan 2 to the grounding electrode at Soera. The 23 km long submarine cable to the Danish island of Laeso begins at Stensnaes. This cable consists of 3 parallel cables, each of two partial conductors with a copper cross section of 310 square millimeters. One of these cables was used by Kontiskan 1 and one is used by Kontiskan 2. Of the third set of cables, one conductor was used for Kontiskan 1 and the other is used for Kontiskan 2. Laeso island is crossed by the Konti-Skan on a 17 km long two-pole overhead line. Between Laeso and Sweden a monopolar copper cable was laid for Kontiskan 1 and 2 with a cross section of 1200 square millimetres.
From the Swedish coast a 38 km long overhead power line runs to the converter station of Konti-Skan 1 near Stenkullen. On the first 9 km of this line the pylons also carry the high-voltage conductor of Kontiskan 2 and the conductor to the common grounding of Kontiskan 1 and 2 near Risø on the Baltic Sea. In opposite to Kontiskan 1 the static inverter station of Kontiskan 2 is situated South of Göteborg in near Lindome, and the route of the Kontiskan 1 line. The last 30 km of Konti-Skan 1 are installed on guyed aluminum framework pylons with an unusually low weight of only 800 kilograms.
