The demand for energy is increasing, especially in developing countries. Renewable energies such as hydroelectric power, has become one of the most demanded energy sources for its generation, that is why it was studied and analyzed, through the computational dynamics of fluids "CFD" in the software ANSYS, the flow of a micro vortex gravitational hydroelectric power station for the generation of electric power. This study analyzes a structure that, by its design, has the capacity to form a gravitational vortex current from a water flow with a small difference in height. To verify results, a prototype of the system is built, which will generate energy from the formation of the gravitational vortex. 