The invention discloses a method for calculating short-circuit current of a power network with a high-temperature superconducting current
limiter, comprising the steps of establishing a short-circuitcurrent calculation method with a high-temperature superconducting current
limiter and a high-temperature superconducting current
limiter; Short-circuit current calculation model of FCL; inputting grid data and fault information into the model; simplifying the original network; constructing the
admittance matrix of the simplified network; triangulating the
admittance matrix; solving the
voltage vector by the forward-backward
substitution method; recalculating the impedance of the nonlinear
branch according to the
voltage vector, and updating the
admittance matrix; calculating the sum of the currents of adjacent branches of the fault node, and further calculating the current deviation; judging whether the current deviation is less than a preset threshold value, and if so, completing the calculation; injecting the three-sequence currents of the fault node and the
bus at both ends of the current limiter into the
linear network, and solving the other
bus voltages and
branch currents. The technical proposal provided by the invention has the advantages of simple calculation, accurate result, strong practicability and the like, and can provide the basis for the safety and stability analysis of the
electric network containing the high-temperature superconducting current limiter, the
relay protection setting calculation and the like.