Showing papers by "Jacob Østergaard published in 2004"
TL;DR: The aim of this demonstration project is to gain experience with HTS cables under realistic conditions in a live distribution network and the implications of these experiences for the future applications of HTS cable systems are analysed.
Abstract: A superconducting cable based on Bi-2223 tape technology has been developed, installed and operated in the public network of Copenhagen Energy in a two-year period between May 2001 and May 2003. This paper gives a brief overview of the system and analyses some of the operation experiences. The aim of this demonstration project is to gain experience with HTS cables under realistic conditions in a live distribution network. Approximately 50 000 utility customers have their electric power supplied through the HTS cable. The cable system has delivered 226 GW h of energy and reached a maximum operating current of 1157 A. The operation experiences include over-currents of 6 kA due to faults on peripheral lines, commissioning, servicing and failure responses on the cooling system, continuous 24 h, 7 day per week monitoring and performance of the alarm system. The implications of these experiences for the future applications of HTS cable systems are analysed.
35 citations
01 Jan 2004
TL;DR: The research and development of superconducting cables started in the late 1960s when the low temperature super-conducting alloys became available [1], and the motivation for this development in the 1970s and 1980s was the increasing need for transmission systems with high rated power as discussed by the authors.
Abstract: The research and development of superconducting cables started in the late 1960s when the low temperature superconducting alloys became available [1]. The motivation for this development in the 1970s and 1980s was the increasing need for transmission systems with high rated power. Later on the increasing environmental concern about the overhead lines especially in urban areas made it desirable to find solutions where cables could transfer large amounts of power.
2 citations