Superconducting fault current-limiter with variable shunt impedance
Patent
·
OSTI ID:1108610
A superconducting fault current-limiter is provided, including a superconducting element configured to resistively or inductively limit a fault current, and one or more variable-impedance shunts electrically coupled in parallel with the superconducting element. The variable-impedance shunt(s) is configured to present a first impedance during a superconducting state of the superconducting element and a second impedance during a normal resistive state of the superconducting element. The superconducting element transitions from the superconducting state to the normal resistive state responsive to the fault current, and responsive thereto, the variable-impedance shunt(s) transitions from the first to the second impedance. The second impedance of the variable-impedance shunt(s) is a lower impedance than the first impedance, which facilitates current flow through the variable-impedance shunt(s) during a recovery transition of the superconducting element from the normal resistive state to the superconducting state, and thus, facilitates recovery of the superconducting element under load.
- Research Organization:
- Superpower, Inc, Schenectady, NY, USA
- Sponsoring Organization:
- USDOE
- Assignee:
- Superpower, Inc. (Schenectady, NY)
- Patent Number(s):
- 8,588,875
- Application Number:
- 12/691,325
- OSTI ID:
- 1108610
- Country of Publication:
- United States
- Language:
- English
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