The rising demands for electric energy for the country now require diversifying energy sources, including renewable energy from wind power. With the increasing requirements for the quality of electric power grids, generators are required to work in greatly stable grids to ensure the quality of voltages and frequencies. Many studies on the stability control in electric power grids have been conducted. However, they still need further studies. In this article, the author mentions improving the operation stability of wind power generators in their grids by means of internal control model. This method has many advantages compared to others. The simulation results show that the system can synchronize with its grid with great stability.