Abstract—An Injection of a renewable energy generator will cause a change in power flow in the existing system and can affect the overall system stability. With the injection of new generator, an evaluation of the power system needs to be done to update data in relation to the condition of power system. In this study, simulations of steady state analysis and dynamic stability were carried out which included rotor angle stability, frequency stability and voltage stability, as well as critical clearing time to evaluate the impact of Jeneponto Wind Power Plant (WPP) injection on SULSELBAR power system performance in Indonesia. The steady state analysis results show that voltage profile of the system has improved and reduced active power losses of 0.11%, reactive power of 0.12% after injection of the WPP. Next, dynamic stability analysis shows recovery time of the rotor angle, frequency and voltage can return to the steady state condition after experiencing interference with duration of 0.823 sec. The critical clearing time after the WPP injection is longer the duration of the interruption, i.e. the duration of the interruption time 0.1889 sec the rotor angle experienced synchronous release.