Invention Grant
- Patent Title: Fast-cycling, conduction-cooled, quasi-isothermal, superconducting fault current limiter
- Patent Title (中): 快速循环,传导冷却,准等温,超导故障限流器
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Application No.: US13813060Application Date: 2011-07-29
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Publication No.: US08948830B2Publication Date: 2015-02-03
- Inventor: Michael Sumption , Edward Collings , Milan Majoros
- Applicant: Michael Sumption , Edward Collings , Milan Majoros
- Applicant Address: US OH Columbus
- Assignee: The Ohio State University
- Current Assignee: The Ohio State University
- Current Assignee Address: US OH Columbus
- Agency: Standley Law Group LLP
- International Application: PCT/US2011/045994 WO 20110729
- International Announcement: WO2012/016202 WO 20120202
- Main IPC: H01B12/00
- IPC: H01B12/00 ; H01F6/00 ; H01L39/00 ; H02H9/02 ; H01L39/16 ; H01F6/04

Abstract:
Fault Current Limiters (FCL) provide protection for upstream and/or downstream devices in electric power grids. Conventional FCL require the use of expensive conductors and liquid or gas cryogen handling. Disclosed embodiments describe FCL systems and devices that use lower cost superconductors, require no liquid cryogen, and are fast cycling. These improved FCL can sustain many sequential faults and require less time to clear faults while avoiding the use of liquid cryogen. Disclosed embodiments describe a FCL with a superconductor and cladding cooled to cryogenic temperatures; these are connected in parallel with a second resistor across two nodes in a circuit. According to disclosed embodiments, the resistance of the superconducting components and its sheath in the fault mode are sufficiently high to minimize energy deposition within the cryogenic system, minimizing recovery time. A scheme for intermediate heat storage also is described which allows a useful compromise between conductor length enabled energy minimization and allowable number of sequential faults to enable an overall system design which is affordable, and yet allows conduction cooled (cryogen free) systems which have fast recovery and allows for multiple sequential faults.
Public/Granted literature
- US20130190187A1 FAST-CYCLING, CONDUCTION-COOLED, QUASI-ISOTHERMAL, SUPERCONDUCTING FAULT CURRENT LIMITER Public/Granted day:2013-07-25
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