US 12,300,978 B2
Subsea substation system with one enclosure having separate thermal zones
Harald Fretheim, Aurskog (NO); Oistein Martinsen, Bærums Verk (NO); Stian Ingebrigtsen, Bergen (NO); and Vitor Hugo Eiti Moritsugu, Bergen (NO)
Assigned to ABB Schweiz AG, Baden (CH)
Appl. No. 18/718,115
Filed by ABB Schweiz AG, Baden (CH)
PCT Filed Nov. 15, 2022, PCT No. PCT/EP2022/081975
§ 371(c)(1), (2) Date Jun. 10, 2024,
PCT Pub. No. WO2023/110262, PCT Pub. Date Jun. 22, 2023.
Claims priority of application No. 21214086 (EP), filed on Dec. 13, 2021.
Prior Publication US 2024/0421568 A1, Dec. 19, 2024
Int. Cl. H02B 1/56 (2006.01); H01F 27/02 (2006.01); H01F 27/12 (2006.01); H02B 7/06 (2006.01); H02J 3/38 (2006.01); H05K 7/20 (2006.01); H05K 9/00 (2006.01)
CPC H02B 1/56 (2013.01) [H01F 27/025 (2013.01); H02B 7/06 (2013.01); H02J 3/38 (2013.01); H05K 7/20236 (2013.01); H01F 27/12 (2013.01); H05K 9/0001 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A subsea substation system comprising:
an oil-filled water impermeable enclosure;
an AC-transformer, and
at least one overcurrent device electrically connected to the AC-transformer, the at least one overcurrent device, the AC-transformer, and the electrical connections between them are accommodated in the oil-filled water impermeable enclosure, wherein
the enclosure comprises thermal zones within the enclosure, wherein the AC-transformer is arranged in a first thermal zone and the overcurrent devices are arranged in a second thermal zone of the enclosure, wherein a mechanical barrier made from at least one sheet of wood or pressboard form a thermal layer that separates the first thermal zone and the second thermal zone, the mechanical barrier is not sealed against walls of the enclosure, wherein the at least one thermal layer is configured to allow oil flow between the thermal zones in areas between the walls of the enclosure and the mechanical barrier that is sufficiently low such that the first thermal zone differs from the second thermal zone with respect to temperature.