Comparative assessment of classical and adaptive controllers for Automatic Voltage Regulator

In this paper various controllers such as Proportional Integral Derivative (PID) based on Adaptive Particle Swarm Optimization (APSO), Proportional Integral (PI), Fuzzy PI and Fuzzy PID are analyzed and designed for Automatic Voltage Regulator (AVR). The focal motive is to regulate the terminal voltage and reactive power to avoid instability of the generating station in an effective manner. Furthermore, stability analysis based on performance measures i.e. Integral Squared Error (ISE), Integral Absolute Error (IAE) and Integral Time-weighted Absolute Error (ITAE) and time domain analysis based on root locus are also performed. Besides in comparison, the various simulation results validate robustness and effectiveness of Fuzzy PID for control of AVR.