Patent ID: 11190010

Abstract:
Provided are a method and apparatus for calculating fault resistance and a current-limiting current of a superconducting fault current limiter. The method includes: calculating a first short-circuit fault current In(t) of a power grid short-circuit fault transient circuit; calling an external characteristic model U(I,t), and calculating resistance Rn(t) of a superconducting fault current limiter under the first short-circuit fault current In(t); adding the resistance Rn(t) of the superconducting fault current limiter into the power grid short-circuit fault transient circuit, and calculating a second short-circuit fault current Im(t), where m=n+1; and determining whether an error between the second short-circuit fault current Im(t) and the first short-circuit fault current In(t) is smaller than a preset threshold value, if yes, determining the fault resistance and the current-limiting current of the superconducting fault current limiter to be Rn(t) and Im(t) respectively; otherwise, In(t)=Im(t), returning for iteration.