Calculation of Sudden Three-Phase Short-Circuit Current of Turbine Generator by 3D Magnetic Field Analysis

Abstract

Sudden three-phase short circuit current of a turbine generator was calculated by a three-dimensional magnetic field analysis. That analysis takes into account the rotation, magnetic saturation, and eddy current at a rotor part.
To compare test results and calculated results, we proposed a method for short-circuit phase estimation at sudden three-phase short-circuit test by line voltage waveform of the test results. The calculated results of short-circuit current waveform are good agreement with the test results.