Applications of high-temperature superconductors in power technology

Abstract

Since the discovery of the first high-temperature superconductors (HTSs) in the late 1980s, many materials and families of materials have been discovered that exhibit superconductivity at temperatures well above 20 K. Of these, several families of HTSs have been developed for use in electrical power applications. Demonstration of devices such as motors, generators, transmission lines, transformers, fault-current limiters, and flywheels in which HTSs and bulk HTSs have been used has proceeded to ever larger scales. First-generation wire, made from bismuth-based copper oxides, was used in many demonstrations. The rapid development of second-generation wire, made by depositing thin films of yttrium-based copper oxide on metallic substrates, is expected to further accelerate commercial applications. Bulk HTSs, in which large single-grain crystals are used as basic magnetic components, have also been developed and have potential for electrical power applications.

Efecto de la adición de Ag en Bi-2212 texturado mediante laser

“…El desarrollo de aplicaciones comerciales basadas en superconductores de alta temperatura crítica precisa el uso de técnicas que doten de textura a estos materiales para que se puedan conseguir valores de corriente crítica (I c ) suficientes para aplicaciones tecnológicas de potencia 1 . Los superconductores de la familia del Bi y, en particular, la fase Bi 2 Sr 2 CaCu 2 O 8+δ (Bi-2212) ha demostrado ser útil para numerosas aplicaciones de potencia cuando ha sido procesada adecuadamente.…”

Properties of YBa2Cu3O7−δ Superconducting Films on Sr2YSbO6 Buffer Layers

“…For an HTS, this critical magnetic field is called the irreversibility field, B irr ,w h i c h is the field at which flux lines or vortices to flow and causes dissipation. This value is often considerably lower than the B c2 of the material (Hull, 2003). ) shows B irr in function of temperature for some materials.…”

“…This is the main reason why the YBa 2 Cu 3 O 7−δ is the preferred material for applications involving high magnetic fields, and therefore, the reason why we decided to use YBa 2 Cu 3 O 7−δ and no other superconductor material for our study. (Hull, 2003).…”

“…Different oxide materials have been successfully used as a buffer layer to fulfill these requirements (Foltyn et al, 2007;Huhne et al, 2006;Jia et al, 2002;2003;Nishikawa et al, 2003;Parans et al, 2003;Sathyamurthy et al, 2003;Wang et al, 2005;Wee et al, 2005). However, most of them are really multilayer architectures, which significantly increase the complexity as well as the cost of production (Ying et al, 2009).…”

A superconducting joint for GdBa2Cu3O7−δ-coated conductors

“…[1][2][3][4][5] These CCs are promising for superconducting magnet applications because of their high I c density, low dependency of the I c on the external magnetic field, good mechanical properties and reasonable cost, which offer opportunities to develop ultra-high-field magnets. [6][7][8] Unfortunately, these CCs have not been used in superconducting devices with persistent current mode (PCM) operation such as magnets for magnetic resonance applications owing to the unavailability of fabrication techniques for proper joining and contacts. [9][10][11][12] An ideal joint for 2G high-temperature superconducting (HTS) CCs requires perfect physical, chemical and mechanical continuity and uniformity throughout the CC-joint-CC connection, as well as sufficient metallurgical capacity without the formation of deleterious constituents, mechanical soundness and good performance under varying conditions, including closed-loop conditions for PCM operation.…”