Operating electrical power system in a large scale can disturb the stability of the rotor of the synchronous generator on the generating side which can result in failures. This research is intended to investigate the effect of dynamic load parameter on power system oscillation damping. The behavior of power system after the disturbance on various value of dynamic load parameter are shown with Simulink Matlab simulation. The developed power system oscillation model consists of a dynamic load and a synchronous generator. According to the model, a block diagram is created. Thus, it can depict the interaction between the dynamic load and the power system. The results of this research show that the drop of reference voltage results in the increase of rotor angle (∆δ) and the decrease of terminal voltage (∆Vt). If the ratio of transient exponential constant (npt) with the static exponential constant (nps) is equal to one, the curve of ∆δ and ∆Vt will not oscillate. If npt/nps < 1, ∆δ curve will oscillate above the steady state value and ∆Vt will oscillate below the steady state value. Furthermore, If npt/nps > 1, ∆δ curve will oscillate below the steady state value and ∆Vt will oscillate aboce the the steady state value. Moreover, the higher nps, the value of ∆δ becomes higher and the value of ∆Vt becomes smaller. The last point is that the higher Tp, the transition of ∆δ and ∆Vt into steady state become longer.
Operation of an electric power system through a transmission network that has limited capacity can cause system instability when the system is disturbance. This study aims to investigate the influence of dynamic loads on the electric power system oscillation damping. The interaction between the electric power system and dynamic load after and before interference is simulated through Simulink Matlab. Dynamic load models are developed from the Hill model based on load power responses due to voltage changes. While the electric power system model is based on a model developed by Demello, which is a Single Machine Infinite Bus System. 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. This study can be used as a basis for studying the behavior of electrical power systems that experience greater disturbance with load feedback.
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