Quench behavior of YBaCuO films for fault current limiters under magnetic field
Quench behavior of YBaCuO films for fault current limiters under magnetic field
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DOI：
10.1109/tasc.2003.812988
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发表时间：
2003-07
影响因子：
1.8
通讯作者：
Kwon-Bae Park;J. Kang;Byung-Jae Lee;I. Oh;Hyosang Choi;Hye-Rim Kim;O. Hyun
中科院分区：
文献类型：
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作者：
Kwon-Bae Park;J. Kang;Byung-Jae Lee;I. Oh;Hyosang Choi;Hye-Rim Kim;O. Hyun
阻性超导限流器(SFCL)是电力系统中极具吸引力的装置。但YBCO薄膜在用作限流材料时，由于制作工艺的不均匀性，存在一些严重的问题。当YBCO薄膜具有一定的不均匀性时，为了提高额定工作电压，串联故障限流单元很难实现同时熄灭。为了解决这些问题，在YBCO元件上施加了0~130mT的垂直磁场。然后，通过电学测量方法和气泡行为的观察，研究了所有元素的扩展电场-电流特性和失超特性。将实验结果与串联的YBCO元件的失超特性进行了比较。实验结果表明，周围线圈产生的外加磁场可以使所有带材产生均匀的淬火分布，并在所有YBCO元件中实现同时淬火。最后，通过施加垂直于限制器的垂直磁场，串联5片YBCO薄膜，实现了1.2kV/次均方根/额定阻性故障限流器。
The resistive superconducting fault current limiters (SFCLs) are very attractive devices for the electric power network. But they have some serious problems when the YBCO thin films were used for the current limiting materials due to the inhomogeneities caused by manufacturing process. When the YBCO films have some inhomogeneities, simultaneous quenches are difficult to achieve when the fault current limiting units are connected in series for increasing operating voltage ratings. In order to solve these problems, vertical magnetic fields varied from 0 to 130 mT were applied to the YBCO elements. Then, extensive electric field-current (E-I) and quench characteristics were investigated for all elements by using both electrical measuring method and observations of bubble behaviors. The experimental results were compared with the quench properties of YBCO elements, which were connected in series. From the experiment works, it was revealed that applied magnetic fields generated by surrounding coils could induce uniform quench distribution for all strips and simultaneous quenches were realized in all YBCO elements. Finally, by applying vertical magnetic fields perpendicular to the limiting devices, 1.2 kV/sub rms/ rated resistive fault current limiter were realized using five YBCO films in series.