Comparative performance analysis of classical controllers for automatic voltage regulator

This paper proposes a four term proportional-integral-derivative plus second order derivative (PIDD2) controller for automatic voltage regulator (AVR) system. The four parameters of the proposed controller are optimized using linear quadratic regulator (LQR) method. A juxtaposition of voltage responses of the AVR system with PID controller, tuned by different optimization techniques, and the voltage response obtained from the AVR system controlled by proposed controller is accomplished. Robustness analysis of the proposed PIDD2 controller is performed for controlling the AVR system while changing the studied system parameters. Simulation results manifest a stupendous response of the proposed PIDD2 controller in collation to the other optimizing techniques based PID controller for controlling the studied AVR system. Moreover, it is entrenched that the proposed PIDD2 controller is robust enough to control the studied system with variation in system parameters within a substantial range.

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