The definitions of generator excitation models at home and aboard widely used in power system simulation software have some obvious differences. In order to convert the Chinese excitation defined in BPA/PSASP models to the Institute of Electrical and Electronic Engineers(IEEE)standard model

a conversion method of excitation model with invariant compensation characteristic based on frequency domain is proposed. The Chinese excitation model of frequency compensation characteristics is firstly calculated based on the BPA/PSASP definition with basic frequency

and the total amplitude-frequency compensation characteristic of proportion integration differentiation(PID)correction module of excitation model is calculated

based on which the matched parameters of IEEE excitation model are obtained. This method can retain the dynamic characteristics of the original excitation system without a lot of custom modeling work and initial value balancing calculation to realize the transformation of the vast majority of Chinese excitation models. The time domain simulation results of an actual power grid have verified the effectiveness of the proposed method. This work is supported by State Grid Corporation of China.