It is a question in this TP of making the modeling and the simulation of the three-phase source of voltage under the Matlab software into which the libraries Simulink and SimPowerSystems are integrated. These libraries contain blocks of modeling which allow indicates it, simulation, the implementation and the system monitoring of communication and processing of signal… etc the objective thus is to implement the three-phase source under Matlab with various manners.-It is a question in this TP of making the modeling and the simulation of the three-phase source of voltage under the Matlab software into which the libraries Simulink and SimPowerSystems are integrated. These libraries contain blocks of modeling which allow indicates it, simulation, the implementation and the system monitoring of communication and processing of signal… etc the objective thus is to implement the three-phase source under Matlab with various manners.