A New Combined Model for Simulation of Mutual Effects between LFC and AVR Loops

In this paper a new model is proposed to show the interaction between the LFC and the AVR loops. These coupling effects of the AVR and LFC loops are studied by extending the linearized AGC system to include the excitation system. A complete system model for low-frequency oscillation studies should be composed of mechanical and electrical loops. So one machine - infinite bus model of a power system is combined to load frequency control system. This proposed combined model is tested on one-area power system. The results are shown that by using this model more accuracy will be reachable in dynamic and steady state responses.