Cooling Unit for the 500 kV Saturated Iron Core Fault Current Limiter

被引:4
|
作者
Li, Chao [1 ,2 ]
Zhang, Pingxiang [1 ,2 ]
Wang, Dayou [1 ,2 ]
Song, Meng [3 ]
Ma, Tao [4 ]
Ma, Peng [5 ]
Ge, Zhengfu [5 ]
机构
[1] Northwestern Polytech Univ, Xian 710018, Shaanxi, Peoples R China
[2] Western Superconducting Technol Co Ltd, Xian 710018, Shaanxi, Peoples R China
[3] Guangdong Power Grid, Guangzhou 510080, Guangdong, Peoples R China
[4] Beijing Jiaotong Univ, Sch Elect Engn, Beijing 100044, Peoples R China
[5] Xian Superconducting Magnet Technol Co Ltd, Xian 710018, Shaanxi, Peoples R China
基金
国家重点研发计划;
关键词
Cryogenic cooling; saturated iron core fault current limiter; subcooled liquid nitrogen;
D O I
10.1109/TASC.2019.2897714
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The high temperature superconducting dc bias winding of the single-phase 500 kV saturated iron core is designed to be cooled with liquid nitrogen down to a temperature of 72 K. To achieve this temperature level, the coolant has to be vaporized below atmospheric pressure. An open cryogenic system was designed and fabricated, which composed of a cryostat, heat insulation pipelines, a liquid nitrogen tank, a control circuit, and a vacuum pump. Since the dc bias winding is composed of two YBCO windings and one Bi-2223 coil, three pairs of current leads are assembled on the cryostat. A control system is used to maintain the liquid nitrogen level and the operation temperature by regulating the pumping rate. According to the testing results, the steady-state heat loss including the cryostat, the conduction heat loss of current lead is about 135 W, and the total heat loss including the Joule heat loss is about 187 W at 77 K.
引用
收藏
页数:5
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