For studying the feature of static var compensator（SVC）installing in the power grid and its influence on the power grid

it’s necessary to model the SVC and perform electromagnetic transient simulation. The simulation which is high identical to the real SVC equipment is needed with purpose of studying the effectiveness of electromagnetic transients. The method which is high identical to the real SVC equipment is set up by ATP（alternative transients program）simulation software is introduced through an actual case. The control and modeling method of SVC for the grid is described in detail. Such functions and methods as low voltage control

adaptive gain and firing angle by linear fitting are introduced in detail. The simulation results of the built ATP model and that of RTDS（real time digital power system）of actual device are compared

showing the waveforms of both are very close. It is shown that the built ATP model can fully reflect the characteristics of actual SVC and provide effective and credible means for the study of electromagnetictransientthroughATPsoftware.