초록 ▼

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, 3

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).

대표청구항 ▼

The invention claimed is: 1. A system for power supply to subsea installations and plants for production of hydrocarbons, comprising a pipeline, wherein the possibility for internal formation of detrimental hydrates or wax deposits is present, and comprising electrical power supply cables connected

The invention claimed is: 1. A system for power supply to subsea installations and plants for production of hydrocarbons, comprising a pipeline, wherein the possibility for internal formation of detrimental hydrates or wax deposits is present, and comprising electrical power supply cables connected to each end of the pipeline and configured to directly electrically heat the pipeline through application of alternating current to the pipeline by means of cable connectors having an electrical connection to the surrounding sea in a first circuit configuration, wherein the power supply cables are further configured to, in a second circuit configuration, provide a three phase power supply to an electrically powered motor in a subsea installation unit connected to the pipeline, and that means are arranged for switching so that three conductors forming the power supply cables form parallel conductors in the first circuit configuration, and wherein only a single power source is used to supply power to directly electrically heat the pipeline and to power the electrically powered motor.