FAULT TOLERANT SUBSEA TRANSFORMER

摘要

According to some embodiments, subsea fault tolerant transformer includes an arrangement of two tanks mounted one above the other. A lower tank houses the transformer windings and core and is below and abutting an upper tank. Both tanks are filled with respective dielectric oil. The electrical terminals for the primary and secondary power connections are on the second/instrument tank and the conductors pass through the instrument tank and then through the shared wall to the transformer tank. The design allows for enhanced cooling of the transformer through a single wall portion of the lower tank as well as fault tolerance associated with double barriers.

主权项

1. A subsea transformer comprising:
a primary set of coil windings; a secondary set of coil windings; a first sealed tank defined by a first tank wall and housing said primary and secondary sets of coil windings and a first dielectric fluid which bathes said primary and secondary sets of coil windings, said first tank wall being configured for deployment in a subsea environment; a second sealed tank housing a second dielectric fluid and being positioned adjacent to the first sealed tank such that the first and second sealed tanks share a shared portion of the first tank wall, wherein a volume of said second sealed tank extends around said shared portion of said first tank wall; a set of primary terminals mounted on said second sealed tank connected to a first electrical conduction path to said primary set of coil windings and passing through said second sealed tank, said shared portion of the first tank wall and into said first sealed tank; and a set of secondary terminals mounted on said second sealed tank connected to a second electrical conduction path to said secondary set of coil windings and passing through said second sealed tank, said shared portion of the first tank wall and into said first sealed tank.