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In this paper, a new performance for capacitor compensators is proposed to limit the fault current in power systems which capacitors used. In the normal mode of operation, the shunt capacitors banks as reactive power compensators that delivers reactive power to increase the power factor. When faults states occurs, the capacitor can reduce fault current peak value, a dynamic model for calculating short-circuit current of power system with reactive compensators is established by using the equations describing balanced three-phase power system short-circuit equivalent circuit in Matlab-Simlink program. Simulations performed in MATLAB/Simulink environment indicate that the proposed performance for capacitor compensators performs well to limit the fault currents of distribution systems and line-voltage drops.