This article presented the model, the controller and the design of D-STATCOM equipment for maintaining the load bus voltage due to the drop and the overloaded voltage. The model had been used to design a current control, DC voltage control, AC voltage bus control. The DC voltage control used the hysteresis principles while the current control used P and I control. The parameters of P and I controller were determined by the most appropriate method at the symmetrical optimal in the AC voltage at the load bus. The design was used to control P and I that work together with the compensation phase lead in forward and backward. The parameters of the control voltage were searched by Genetic Algorithm. The test system in this article was the simple electrical power distribution system by experimenting in the simulation program MATLAB/ Simulink. The result of this experimental showed that the D-STATCOM equipment and the controller design could be maintained the level of the voltage load bus due to the dropped pressure and exceed quickly within 0.01 seconds.