| Title |
Improvement of Quench Properties of a Superconducting Fault Current Limiter Using YBCO Films by Serial and Parallel Combinations |
| Keywords |
superconducting fault current limiter ; simultaneous quench ; YBCO film |
| Abstract |
We improved quench properties of a superconducting fault current limiter (SFCL) based on YBCO thin films by their serial and parallel combinations. The SFCL consisted of 6 switching elements fabricated of 4 inch-diameter YBCO thin films. The quench currents of the switching elements were distributed between 33.9 A and 35.6 A. Simple serial connection resulted in imbalanced power dissipation between switching elements even at the quench current difference of 0.6 A. On the other hand, 2×2 and 3×2 stack combinations produced simultaneous quenches. The 3×2 stack combination showed better simultaneous quench behavior than the 2×2 stacks. This is suggested to be because the currents between switching elements in parallel connection of the 3×2 stacks were more effectively redistributed than the 2×2 stacks. |