Choi Y H, Song J B, Yang D G, Kim Y G, Hahn S, Lee H G
Department of Materials Science and Engineering, Korea University, Anam-Dong 5 Ga, Seongbuk-Gu, Seoul 136-713, South Korea.
National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA.
Rev Sci Instrum. 2016 Oct;87(10):104704. doi: 10.1063/1.4963680.
This paper presents our recent progress on core technology development for a megawatt-class superconducting wind turbine generator supported by the international collaborative R&D program of the Korea Institute of Energy Technology Evaluation and Planning. To outperform the current high-temperature-superconducting (HTS) magnet technology in the wind turbine industry, a novel no-insulation winding technique was first proposed to develop the second-generation HTS racetrack coil for rotating applications. Here, we briefly report our recent studies on no-insulation (NI) winding technique for GdBCO coated conductor racetrack coils in the following areas: (1) Charging-discharging characteristics of no-insulation GdBCO racetrack coils with respect to external pressures applied to straight sections; (2) thermal and electrical stabilities of no-insulation GdBCO racetrack coils encapsulated with various impregnating materials; (3) quench behaviors of no-insulation racetrack coils wound with GdBCO conductor possessing various lamination layers; (4) electromagnetic characteristics of no-insulation GdBCO racetrack coils under time-varying field conditions. Test results confirmed that this novel NI winding technique was highly promising. It could provide development of a compact, mechanically dense, and self-protecting GdBCO magnet for use in real-world superconducting wind turbine generators.
本文介绍了在韩国能源技术评价与规划院国际合作研发项目支持下，兆瓦级超导风力发电机核心技术开发的最新进展。为了超越风力涡轮机行业目前的高温超导（HTS）磁体技术，首次提出了一种新颖的无绝缘绕组技术，用于开发旋转应用的第二代高温超导跑道线圈。在此，我们简要报告我们最近在以下方面对钆钡铜氧（GdBCO）涂层导体跑道线圈的无绝缘（NI）绕组技术的研究：（1）无绝缘GdBCO跑道线圈在施加于直线段的外部压力下的充放电特性；（2）用各种浸渍材料封装的无绝缘GdBCO跑道线圈的热稳定性和电稳定性；（3）用具有不同叠层的GdBCO导体缠绕的无绝缘跑道线圈的失超行为；（4）无绝缘GdBCO跑道线圈在时变场条件下的电磁特性。测试结果证实，这种新颖的NI绕组技术非常有前景。它可以为实际的超导风力发电机开发一种紧凑、机械致密且自我保护的GdBCO磁体。
