Implementation of a FUZZY logic controller (FLC) for improvement of an Automated Voltage Regulators (AVR) dynamic performance

Achieving stable and fast response of an AVR system is challenging because of the high inductance of the windings of a synchronous generator (SG). As a result, improving AVR performance is critical, and an adequate controlling technique is required to achieve this. This paper implements a Fuzzy Logic controller (FLC) to improve the dynamic performance of an AVR. AVR’s transfer function is mathematically modeled and simulated in order to observe its step response when the terminal voltage of a generator is subjected to load variations. Following an FLC-based AVR model is designed and implemented for a 5by5 and 7by7 fuzzy interface system. The transient response of the AVR system and FLC is analyzed using transient response analysis. Both AVR and FLC-based AVR are modelled and implemented on matlab Simulink 2020a.The results show an improvement in the performance of an FLC-based AVR as compared to the traditional AVR without a controller.