Modeling the current distribution in HTS tapes with transport current and applied magnetic field

A numerical model is developed for the current distribution in a high temperature superconducting (HTS) tape, (Bi,Pb)2Sr2 Ca2Cu3Ox-Ag, subjected to a combination of a transport current and an applied magnetic field. This analysis is based on a two-dimensional formulation of Maxwell's equations in terms of an integral equation for the current density J. The finite thickness of the conductor and an arbitrary voltage-current relation (e.g. n-power relation, magnetic field dependency) for the conductor are included in the model. Another important feature is that the model also covers an applied magnetic field in arbitrary directions and a rotating field perpendicular to the conductor, which is of great interest for analyzing the AC loss of HTS (transformer) coils or three-phase electric power cables. A comparison is made with transport current loss measurements on an HTS tape with an AC applied fiel

Going Green

In future an increasingly larger share of electricity will come from renewable sources (off-shore windmills, solar plants, etc.), while consumption of electricity also increases (incl. electric vehicles). The consequence of these developments is that more electricity is moved over the power networks. Electrical networks will become smart grids with more superconducting components replacing conventional counterparts. Recently the High Voltage research group and the High Voltage Laboratory of TU Delft are involved in a pilot project for a 6 km long high voltage HTS power cable in the Netherlands.Electrical Engineering, Mathematics and Computer Scienc

Cryostat for a high-temperature superconducting power cable

Cryostat for a high-temperature superconducting power cable, comprising concentric tubes, an annular region between said tubes, wherein a multilayer thermal insulation and getter material for supporting high vacuum conditions are provided in said annular region, and wherein the multilayer insulation comprises reflective layers separated by fibrous spacer material, wherein the fibrous spacer material comprises activated carbon micro-fibers and/or activated carbon nano-fibers. Beneficially the getter material is at least in part embodied in the activated carbon fibers of the fibrous spacer material.Electrical Sustainable EnergyElectrical Engineering, Mathematics and Computer Scienc