Influence of longitudinal temperature distribution on current limiting function of Superconducting Fault Current Limiting Cable (SFCLC)

11th European Conference on Applied Superconductivity

Kojima, H.^1 ; Osawa, T.^1 ; Hayakawa, N.^1 ; Hanai, M.^1 ; Okubo, H.^2

Nagoya University, Nagoya, Aichi

464-8603, Japan^1

Aichi Institute of Technology, Toyota, Aichi

470-0392, Japan^2

关键词: Cryocooling systems;    Current limitation;    Current-limiting functions;    Effective measures;    Fault current limiting;    Lower temperatures;    Parameter control;    Temperature rise;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/3/032026/pdf
DOI  :  10.1088/1742-6596/507/3/032026

来源: IOP

【 摘 要 】

We have proposed a Superconducting Fault Current Limiting Cable (SFCLC), which is an HTS cable with fault current limiting function. SFCLC is expected to limit the fault current and also immediately recover the cable function after the fault clearance. In the SFCLC operation, a longitudinal temperature distribution will exist due to heat penetration, AC loss, dielectric loss and the performance of cryocooling system, which will influence its current limitation characteristics. In this paper, we investigate the influence of the longitudinal temperature distribution on current limiting function and temperature rise after the current limitation of SFCLC. We suggested the effective measures of parameter control, i.e. decreasing the critical current (Ic@77K), n value at flux flow region (n1-0), increasing the coefficient of longitudinal temperature gradient (α), inflow temperature (Tin) to achieve both the higher current limiting function and the lower temperature rise.