Superconducting fault current limiter to enable grid integration of wind power

该项目的重点是利用第二代高温超导体(HTS)设计超导故障限流器。SFCL的建议应用是为了限制电网中由于新集成的可再生能源，特别是风电容量的增加而不断增加的故障电流水平。与现有技术相比，例如使用第一代高温超导的SFCL，建议的SFCL具有快速恢复和低交流损耗的优势，这是通过对潜在的高温超导物理的深入了解而实现的。该项目分为三个阶段。最初的物理研究主要集中在与SFCL性能密切相关的高温超导材料的失超发展和传播。实验和数值方法将被用来探索高温超导对高于其临界电流的外加电流的反应。第二阶段将重点放在SFCL的设计上，确定优化的几何结构，并通过建模估计设计的临界电流和交流损耗。第三阶段是电网系统研究与风电一体化仿真平台，考虑了SFCL的实时反应。该仿真平台将为评估SFCL在各种系统故障条件下的性能提供有力的工具。

The project focuses on the design of superconducting fault current limiter (SFCL) using second generation high-temperature superconductors (HTS). The proposed application of SFCL is to limit the ever-increasing fault current level of the grid network due to the increasing capacity of newly integrated renewable energy, especially wind power. Compared to exiting technology, e.g. SFCL using 1st generation HTS, the proposed SFCL has the advantage of quick recovery and low AC loss, which is enabled by thorough understanding of the underlying HTS physics. The project has three phases. The initial physics study focuses on the quench development and propagation of HTS which is closely related to the performance of SFCL. Experimental and numerical methods will be employed in the study to explore how HTS reacts to applied currents which are higher than its critical current. The second phase focuses on the design of SFCL, optimized geometries will be identified, and the critical current and ac loss of the designs will be estimated by the modeling. The third phase is the integration simulation platform of grid system study with wind power, considering the real time reaction of SFCL. This simulation platform will serve as a strong tool to evaluate the SFCL performance under various system fault conditions.