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Delivery of electrical power from the power plant to the load center of widespread done through transmission networks with limited capacity. The operation of such an electric power system can cause a stable condition to be disturbed and a worse result is a total blackout. This study aims to investigate the influence of dynamic loads on the electric power system oscillation damping. The behavior of the electric power system after disruption studied to determine the effect of parameter changes the dynamic load of the electric power system oscillation damping. The electric power system model in this study is a dynamic load model and synchronous generator model. Dynamic load models are developed from the Hill model based on load power responses due to voltage changes. The mathematical formula that describes the interaction between voltage and load power is realized by first-order differential equations. While the electric power system model is based on a model developed by Demello, which is a single electric generator connected to an infinite bus. The synchronous machine in this model is obtained from the classical Park model by assuming that (1) the condition is balanced, (2) the stator coil resistance is ignored, (3) the influence of saturation is ignored, (4) the transmission network is assumed to be zero, and (5) the local load is assumed the voltage depends only on the real power. Based on the two models, an overall block diagram is made that illustrates the interaction between dynamic loads and the electric power system. The results showed that there was an increase in the stability of the electric power system with dynamic load feedback and a decrease in the rotor angle and increase in voltage. So that it can be concluded that changes in dynamic load parameters affect the stability of the electric power system.