| 摘要 |
A system for power supply to subsea installations and plants for production of hydrocarbons, comprising a preferably heat insulated pipeline ( 10 ), in which the possibility for internal formation of detrimental hydrates or wax deposits are present, and comprising electrical power supply cables ( 12, 31 ) for direct electrical heating of the pipeline ( 10 ), and having an electrical connection ( 36 ) to the surrounding sea at an end of the supply cable. The power supply cable ( 12 ) is further configured, in a second circuit configuration, to provide a three-phase power supply to an electrically powered motor in an subsea installation unit ( 11 ) connected to the pipeline ( 10 ), and that means ( 18, 19 ) are arranged for switching so that the three conductors ( 28 ) forming the power supply cables ( 12 ) form parallel conductors in a second circuit configuration, wherein the power supply cables ( 12, 31 ) supply power for direct heating of the pipeline ( 10 ).
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