Comparison between simulative and recorded data of short-circuit current

The simulative results and the actual recorded data of a short-circuit fault in power grid are compared. It shows that, they are matched well with small error, which consists of the wave recording error and the simulative calculation error. The former includes CT error, relay protection (fault recorder) error and virtual value calculation error. The latter includes operation mode simulation error and element parameter errors. The proper control of influencing factors, such as calculation method (based on power flow or not), zero-sequence mutual inductance, low voltage small generators, load models, etc., the error can be controlled within 5%, which means that, the current short-circuit current calculation method is advisable.