Chresten Træholt

Chresten Træholt

Lektor

DTU ELEKTRO
Institut for Elektroteknologi

Danmarks Tekniske Universitet

Elektrovej

Bygning 325, rum 154

2800 Kgs. Lyngby

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Nøgleord Smart Grid | Electric power engineering | Superconductivity | Materials science

Summary of experience 9 years of professional experience in materials science from the Technical University of Denmark and Delft University of Technology in the Netherlands. My main topics were characterisation and analysis of thin films and coatings using transmission electron microscopy. Some teaching experience obtained at DTU. The following 5 years were spent working in the high voltage laboratory of the Department of Electric Power Engineering on the Technical University of Denmark. This period comprises experience with cryogenics (liquid nitrogen), high voltage test of cable and thermo-electrical insulator, high currents and vacuum techniques. In detail the experience covers measurements of mechanical, thermal and electrical characteristics on high temperature superconducting tapes, cable models and terminations. During the last 3 years the test facility and the planning and testing of high temperature superconducting cable models have been part of my responsibility. Little experience with teaching classes, more experience with teaching at advanced level (supervising). The recent 4 years of work at Ultera included almost all aspects of work with design, construction, testing and reporting on commercial prototype superconducting cable, termination, splice and cooling system. Testing was done at NKT Research, DTU, IHK (Ballerup) and ORNL, Tennessee (US). Further, the work included responsibility with the websites www.ultera.net (our home page) and www.supercables.com, involvement in our own and others patents (IP), field installation in Columbus, Ohio, conferences as well as guest teaching at DTU. Award(s) August 2001 The Electro Prize 2001 (Elektroprisen). Education and experience July 2006 Senior Research Engineer, Ultera, A Southwire/nkt cables Joint Venture, ?NKT Cables A/S, Priorparken 560, Brøndby, Copenhagen, Denmark. Function: Participate in cable development, IP protection and technical marketing of superconducting cables as well as of conventional cables. Project leaders: David Lindsay, Ultera US and Dag Willén, Ultera DK. May 2002 Senior Research Scientist, Ultera, A Southwire/nkt cables Joint Venture, ?NKT Research and Innovation A/S, Blokken 84, Birkerød, Copenhagen, Denmark. Function: Participate in the development, construction and installation of a 200 m long, 3.4 kA superconducting 3 phase demonstration cable using high temperature superconducting Bi-2223/Ag tapes. Installation is completed in Columbus, Ohio, USA Project leaders: David Lindsay, Ultera US and Dag Willén, Ultera DK. January 2000 Associated professor, Department of Electric Power Engineering, Technical University of Denmark, Lyngby, Copenhagen, Denmark. Project: Construction of a 2 kA superconducting 3 phase demonstration cable using high temperature superconducting Bi-2223/Ag tapes. Project leaders: Dr. Dag Willén, NKT Research, Brøndby, Denmark and Prof. Ole Tønnesen, Department of Electric Power Engineering, Technical University of Denmark, Lyngby, Denmark. August 1997 Assistant professor, Department of Electric Power Engineering, Technical University of Denmark, Lyngby, Copenhagen, Denmark. Project: Construction of a 2 kA superconducting demonstration cable using high temperature superconducting Bi-2223/Ag tapes. Project leaders: Dr. Dag Willén, NKT Research, Brøndby, Denmark and Prof. Ole Tønnesen, Department of Electric Power Engineering, Technical University of Denmark, Lyngby, Denmark. April 1995 Senior research scientist on the National Centre for High Resolution Electron Microscopy, Laboratory of Materials Science, Delft University of Technology, Delft, Holland. Project title: Transmission electron microscopy (TEM) of Ti doped or ion irradiated Bi2Sr2CaCu2Ox, TEM of catalysts and TEM of superconducting thin films using the exit wave reconstruction technique (from a focus series) in order to improve the resolution of the microscope to 0.1 nm. Financed one and a half year by FOM. Supervisor: Associate prof. Henny W. Zandbergen, National Centre for High Resolution Electron Microscopy, Laboratory of Materials Science, Delft University of Technology, Delft, Holland. 1991 post doc. on the National Centre for High Resolution Electron Microscopy, Delft University of Technology, Delft in the Netherlands the first 2 years supported by BRITE/EURAM and the third year supported by the Dutch fund of "Fundamentaal Onderzoek der Materie" (FOM). The subject of the research was: "High Resolution Electron Microscopy of Grain Boundaries and Film/Substrate Interfaces in the High Tc superconductor YBa2Cu3O7". Part of this work was included in the Ph.D. dissertation. January 1988 Ph.D. student at Physics Institute, Technical University of Denmark, Lyngby, Copenhagen, Denmark. The subject of the Ph.D. study was: "An Electron Microscopical Investigation of GaAs/AlGaAs Heterostructures and Ceramic Superconductors of the type YBCO". The dissertation was defended in Copenhagen (August 1994) and the Ph.D. degree granted (March 1995). February 1987 Master of Science in Electrical Engineering, Technical University of Denmark, Lyngby, Copenhagen, Denmark. 1981 Graduated from Hjørring Gymnasium (preuniversity).