Bornholm Cable

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Bornholm Cable is one of the longest submarine three phase AC cables in the world. It is a 60 kV cable interconnecting the power grids of Bornholm and Sweden. The Bornholm Cable starts at 60 kV substation Hasle (55°10′13″N 14°43′24″E / 55.17028°N 14.72333°E / 55.17028; 14.72333 (Hasle 60 kV substation)) and runs on its 1.4 kilometres as underground cable with a cross section of 400 square millimetres to the Baltic Sea, where the 43.5 kilometres long submarine cable section starts. At this section copper conductors with 240 square millimetres are used. From the landing point at Sweden it runs on a length of 700 metres as underground cable with conductors with 400 square millimetres to the cable terminal situated at 55°26′00″N 14°13′30″E / 55.43333°N 14.22500°E / 55.43333; 14.22500 (Swedish 60 kV cable terminal), where a 4.2 kilometres long 60 kV overhead line to the 132 kV/60 kV-Substation Borrby substation (55°27′05″N 14°10′00″E / 55.45139°N 14.16667°E / 55.45139; 14.16667 (Borrby Substation)) starts. At this line copper conductors with 127 square millimetres are used. Borrby substation is fed by Tomelilla substation (55°33′28″N 13°56′18″E / 55.55778°N 13.93833°E / 55.55778; 13.93833 (Tomelilla Substation)) by a 132 kV line with 2 circuits.

Rønne Power Station[edit]

Rønne Power Station has 2 steam units, one oil-fired with a generation capacity of 25 MW inaugurated in 1974, and a second one, which vcan be fired either with oil or coal. It was inaugurated in 1995 and has a generation capacity of 37 MW.

Power grid of Bornholm[edit]

The power grid of Bornholm consists of a 60 kV-ring line connecting the substations Hasle, Olsker, Østerlars, Dalslunde, Bodilsker, Aakirkeby, Rønne-Syd, Rønne Power Station, Viadukten, Snorrebakken. Apart from the section between Ronne-Syd and Snorrebakken, it is an overhead line. From this ring line several 60 kV lines branch, which are all implemented as underground cables. These are the branch to Allinge starting at Olsker, that to Gudhjem starting at Østerlars, a branch to Svaneke starting at Dalslunde, a branch to Svaneke via Nexo starting at Bodilsker, a branch to Poulsker starting at Bodilker. A further branch to Westhaven starts at Rønne Power Station. A further connection built as underground cable connects Hasle substation with Rønne-Nord, Viadukten and Ronne-South.

Technical data of 60 kV Substations of Bornholm[edit]

Substation Coordinates Year of inauguration Count of transformers Transformer (MVA) Count of 10 kV feeders Remarks
Aakirkeby 55°4′5″N 14°53′52″E / 55.06806°N 14.89778°E / 55.06806; 14.89778 (Aakirkeby Substation) 1967 2 16.0 10
Allinge 55°16′6″N 14°48′1″E / 55.26833°N 14.80028°E / 55.26833; 14.80028 (Allinge Substation) 1984 2 20.0 4
Bodilsker 55°3′47″N 15°3′57″E / 55.06306°N 15.06583°E / 55.06306; 15.06583 (Bodilsker Substation) 1959 2 14.0 6
Dalslunde 55°6′0″N 15°3′3″E / 55.10000°N 15.05083°E / 55.10000; 15.05083 (Dalslunde Switching Station) 0 0 0 Switching Station, no transformers
Gudhjem 55°11′57″N 14°57′11″E / 55.19917°N 14.95306°E / 55.19917; 14.95306 (Gudhjem Substation) 1998 1 4.0 4
Hasle 55°10′13″N 14°43′24″E / 55.17028°N 14.72333°E / 55.17028; 14.72333 (Hasle Substation) 1980 2 20.0 7
Nexø 55°3′47″N 15°6′57″E / 55.06306°N 15.11583°E / 55.06306; 15.11583 (Nexo Substation) 1981 2 20.0 6
Olsker 55°13′55″N 14°47′44″E / 55.23194°N 14.79556°E / 55.23194; 14.79556 (Olsker Substation) 1959 2 8.0 6
Østerlars 55°9′12″N 14°56′6″E / 55.15333°N 14.93500°E / 55.15333; 14.93500 (Østerlars Substation) 1974 1 6.3 4
Poulsker 55°1′20″N 15°3′21″E / 55.02222°N 15.05583°E / 55.02222; 15.05583 (Poulsker Substation) 1990 1 10.0 5
Rønne Nord 55°6′40″N 14°42′28″E / 55.11111°N 14.70778°E / 55.11111; 14.70778 (Rønne Nord Substation) 1989 1 10.0 6
Rønne Power Station 55°6′40″N 14°42′28″E / 55.11111°N 14.70778°E / 55.11111; 14.70778 (Rønne Nord Substation) 2 41.0 9
Rønne Syd 55°5′23″N 14°43′50″E / 55.08972°N 14.73056°E / 55.08972; 14.73056 (Rønne Syd Substation) 1983 1 10.0 4
Snorrebakken 55°6′42″N 14°44′40″E / 55.11167°N 14.74444°E / 55.11167; 14.74444 (Snorrebakken Substation) 1977 1 10.0 6
Snorrebakken 55°6′24″N 14°44′19″E / 55.10667°N 14.73861°E / 55.10667; 14.73861 (Snorrebakken Cable Terminal) 0 0 0 Cable terminal, no transformers
Svaneke 55°8′5″N 15°8′10″E / 55.13472°N 15.13611°E / 55.13472; 15.13611 (Svaneke Substation) 1988 1 10.0 6
Vesthavnen 55°6′10″N 14°41′26″E / 55.10278°N 14.69056°E / 55.10278; 14.69056 (Westhavnen Substation) 1994 1 10.0 4
Viadukten 55°5′52″N 14°42′50″E / 55.09778°N 14.71389°E / 55.09778; 14.71389 (Viadukten Substation) 1988 1 10.0 7

External links[edit]