基于涂层导体高温超导股线的电磁和机械特性以及稳定性研究

项目名称： 基于涂层导体高温超导股线的电磁和机械特性以及稳定性研究

项目编号： No.51477053

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 电工技术

项目作者： 王银顺

作者单位： 华北电力大学

项目金额： 95万元

中文摘要： 近年来，第二代高温超导涂层导体取得了重大进展，单位厘米宽度载流达到500A以上，为高温超导电力应用提供了重要材料基础。然而，由于第二代高温超导涂层导体是带材结构，宽厚比大于20，极易发生尖端放点，低温绝缘问题突出，限制了其在高压电力装置中的应用，是高温超导高电压应用中的瓶颈问题。为了解决尖端放电问题及高载流问题，本课题提出横截面为圆形、正方形或长方形结构超导涂层导体股线概念，由超导股线线芯和包覆层组成，包覆层卷制包覆在超导股线线芯上，采用激光焊接技术将包覆带对缝焊接。超导股线线芯由涂层超导板经切割成涂层超导带材排列拼合成圆形、矩形横截面，实现了基于涂层超导体各向同性超导股线。本课题拓展了涂层超导体的应用范围，超导股线具有各向同性、载流容量大、工程电流密度、无尖端放点的特点，可以应用于高电压等级超导电缆、超导故障限流器、超导变压器、超导电机、大型高场超导磁体、电流引线等超导电力装置中。

中文关键词： 涂层导体；各向异性；高温超导股线；工程电流密度；失超及恢复

英文摘要： Progress on ReBCO coated conductor, so called the second generation (2nd G ) HTS tapes, has been great made in recent 10 years, and its transport current density per unit centimeter is higher than 500 A, which can provide an important material basis for HTS power applications. However, point discharge phenomenon easily happens in 2nd G HTS tapes since its geometry of cross section is thin slab whose gross aspect ratio is more than 20, which easily results in difficulty of cryogenic electrical insulation and is also the bottleneck of its application in superconducting apparatus with high-voltage class. In order to avoid point discharge and improve current density, concepts of HTS strands with geometrical structure of circular, rectangular cross-sections are suggested. The strand consists of 2nd G tapes and cladding metal sheath, the former are arranged in central core of the strand on which the latter are cladded by laser welding technology. Consequently the isotropic HTS strands based on 2nd G HTS tapes are realized. It is predicted that the suggested project can expand the application scope of ReBCO CC. With its advantages of isotropy, large transport current capacity and then high engineering current density without point discharge, it can be applied in applications of superconducting power apparatus with high-voltage level such as cable, fault current limiter (FCL), transformer, generator/motor, magnet with large scale and current leads.

英文关键词： coated conductor;anisotropy;HTS strand;engineering current density;quench and recovery