Comparative Analysis between Conventional AVR and Fuzzy Logic Controller Based Excitation Controller of Synchronous Genrator

The main objective of the excitation system is to enhance the dynamic stability of the system. The issue of power system dynamic stability has garnered significant interest in recent decades due to two primary factors: the escalating scale of generating units and the adoption of high-speed excitation devices. The impact of high-speed excitation on dynamic stability manifests as the introduction of negative damping into the system, resulting in oscillations characterized by diminished damping. Transient instability and subsequent machine oscillation have been noticed in certain circumstances due to the implementation of this excitation mechanism. The design of the excitation system should also be capable of meeting the requirements of various operating situations. Considerable attention has been directed into investigating the impact of excitation control on the damping characteristics of these oscillations. The concepts of linear system theory are used to develop the excitation controller for a synchronous generator. Therefore, the utilization of a linear controller, such as an automated voltage regulator (AVR), can effectively contribute to the provision of required damping via excitation control. This ensures stability in the system after experiencing a minor disturbance. This study presents the development of a standard automated voltage regulator (AVR) and a fuzzy logic-based excitation controller, with the aim of enhancing the attributes of the AVR. The utilization of MATLAB/SIMULINK software is employed for the purpose of evaluating the efficacy of controllers.