Enhancing transient response performance of automatic voltage regulator system by using a novel control design strategy

The terminal voltage of the synchronous generator must be kept between determined values by a closed-loop control system called automatic voltage regulator (AVR). To enhance the performance of the AVR system, this study introduces a new type of controller design. In this context, a novel controller named fractional order (FO) proportional-integral-derivative plus second-order derivative (FOPIDD²) has been proposed for the first time, and an optimization method known as the reptile search algorithm (RSA) has been utilized in order to tune the six parameters of FOPIDD² controller. The performance of the proposed RSA-FOPIDD² controller is compared with twenty-two studies employing a variety of controllers such as PID, PIDA, FOPID, and PIDD² and published within the last three years. The results of the comparison show that the proposed controller provides improved performance for the AVR system when compared to other methods.