Submarine power cable with curvature monitoring capability
AssigneeNKT HV Cables AB
InventorsAndreas Tyrberg, Patrik Holmberg, Petrus Althini
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Abstract
A multi-phase submarine power cable including: a plurality of power cores arranged in a stranded configuration, and a curvature sensor including: an elastic elongated member, and a plurality of Fibre Bragg Grating, FBG, fibres, each FBG fibre extending axially along the elongated member at a radial distance from the centre of the elongated member; wherein the elongated member extends between the stranded power cores along a central axis of the multi-phase submarine power cable.
Claims20
A multi-phase submarine power cable comprising:
- a plurality of power cores arranged in a stranded configuration, and
- a curvature sensor comprising:
- an elastic elongated member, and
- a plurality of Fibre Bragg Grating, FBG, fibres, each FBG fibre extending axially along the elongated member at a radial distance from a centre of the elongated member;
- wherein the elongated member extends between the stranded power cores along a central axis of the multi-phase submarine power cable;
- wherein the elongated member is in direct contact with one or more of the power cores in a plurality of axial locations along an axial length of the elongated member as the elongated member extends inside an interslice or cavity between the power cores.
A method of preparing a multi-phase submarine power cable for operation, the method comprising:
- a) providing a multi-phase submarine power cable including a plurality of power cores arranged in a stranded configuration, the multi-phase submarine power cable having an open end,
- b) providing a curvature sensor including an elastic elongated member and a plurality of Fibre Bragg Grating, FBG, fibres extending axially along the elongated member at a radial distance from a centre of the elongated member, and
- c) pushing the curvature sensor from the open end of the multi-phase submarine power cable in between the stranded power cores and along a central axis of the multi-phase submarine power cable;
- wherein the elongated member is in direct contact with one or more of the power cores in a plurality of axial locations along an axial length of the elongated member as the elongated member extends inside an interslice or cavity between the power cores.
Dependencies are inferred from the claim text.