Resistive superconducting fault current limiter
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United States of America Patent
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Jul 7, 2009
Grant Date -
Jun 7, 2007
app pub date -
Jun 30, 2006
filing date -
Dec 2, 2005
priority date (Note) -
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Abstract
A resistive superconducting fault current limiter comprises: a superconducting limiter element which is in a superconductive state in the event of a normal current occurrence, and which is in a normal conductive state having a predetermined resistance when a fault current larger than a predetermined threshold current value flows; a superconducting serial coil serially connected to the superconducting limiter element so as to face each other so that a current loss can be minimized accordingly as currents flow in opposite directions thus to cancel magnetic fields, and having a threshold current value greater than the threshold current value of the superconducting limiter element by a predetermined ratio; and a normal conductor parallel coil connected to the superconducting limiter element in parallel and having a predetermined resistance smaller than the resistance of the superconducting limiter element when a fault current occurs, for preventing the superconducting limiter element from being overheated by dividing a current flowing through the superconducting limiter element and for uniformly quenching the superconducting limiter element by generating a magnetic field when a fault current occurs
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