新型高温超导限流器无感线圈结构设计与性能测试

本文设计了一种用于磁偏置高温超导故障限流器的平行带材式YBCO超导无感线圈,该线圈由10个单元模块串联而成,每个模块的设计采用一种新型的正反S弯绕制工艺及自张紧结构。实验研究了单模块直流35 kV耐压性能、整个线圈在77 K工作温度下的临界电流性能,以及10 ms且有效值为250 A故障电流冲击下暂态电阻性能。结果表明,超导无感线圈在77 K环境下的临界电流为83 A,10 ms故障电流冲击下的限流电阻约为0.83Ω。测试结果满足设计要求。

Structure design and performance test of a novel superconducting non inductive coil for high temperature superconducting current limiter

In this paper,a parallel ribbon YBCO superconducting non inductive coil for the SFCL with bias magnetic field was designed.The coil was composed of 10 modules in series.Each module adopted a new positive and negative S-bend winding process and self tension structure design.The single module DC 35 kV withstand voltage performance,the critical current performance of the whole coil at 77 K operating temperature and the transient resistance performance under fault current impulse of 10 ms and effective value of 250 A were studied.The experimental results show that the critical current of the coil is 83 A at 77 K,and the current limiting resistance under 10 ms fault current impulse is about 0.83Ω.Those results meet the design requirements.