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US 11,437,166 B2Granted
HVDC power cable with water-blocking capability
AssigneeNKT HV Cables AB
InventorsKristian Gustafsson, Amirhossein Abbasi, Tommy Johansson
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Abstract
A high voltage DC power cable designed for voltages of 320 kV or higher, including: a multi-wire conductor, an inner semiconducting layer arranged around the multi-wire conductor, the inner semiconducting layer forming a screen layer for the multi-wire conductor, a solid insulation system arranged around the inner semiconducting layer, and a water-blocking compound configured to restrict water migration into the high voltage DC power cable.
Claims17
A high voltage DC power cable designed for voltages of 320 kV or higher, comprising:
- a multi-wire conductor,
- an inner semiconducting layer arranged around the multi-wire conductor, the inner semiconducting layer forming a screen layer for the multi-wire conductor,
- a solid insulation system arranged around the inner semiconducting layer, and
- a water-blocking compound configured to restrict water migration into the high voltage DC power cable,
- wherein the water-blocking compound is a liquid with a viscosity greater than 20 Pa·s at a temperature of 20° C.,
- wherein the water-blocking compound is electrically conducting, wherein the water-blocking compound includes a carbon-based component which provides the electric conductivity of the water-blocking compound, wherein the carbon-based component is graphite, wherein the water-blocking compound includes polybutadiene, and an antioxidant.
3 more elements
Dependencies are inferred from the claim text.