Development and Implementation of the Adaptive Fuzzy Logic Based Automatic Voltage Regulator

This paper presents the development and laboratory implementation of the adaptive fuzzy logic (FL) based automatic voltage regulator (AVR) of the synchronous machine. First, the two input fuzzy controller was implemented using the control hardware based on the personal computer to control 2 kVA laboratory synchronous machine. Further the paper contains comparison between the operation of a synchronous machine with excitation control by PI (proportional-integral) and Fuzzy logic techniques. The experimental results showed a better performance of a classical PI controller. In order to improve the dynamic performance of a synchronous machine with FL based AVR, field current (FC) is introduced as the third input to FL controller (FLC). Using the mentioned experimental setup, the performance of the proposed controller is evaluated under various operating conditions. The sets results are presented and discussed. The effectiveness of the adaptive FLC is demonstrated by its encouraging study results, when compared with those of a PI controller