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Salp Swarm Optimization Algorithm-Based Fractional Order PID Controller for Dynamic Response and Stability Enhancement of an Automatic Voltage Regulator System

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School of Electrical Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
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Department of Electrical Engineering, College of Engineering, Majmaah University, Almajmaah 11952, Saudi Arabia
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Department of Electrical Engineering, Mehran University of Engineering and Technology, SZAB Campus, Khairpur Mirs 66020, Pakistan
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Faculty of Electrical Engineering, Balochistan University of Engineering and Technology, Khuzdar 89100, Pakistan
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Author to whom correspondence should be addressed.
Electronics 2019, 8(12), 1472; https://doi.org/10.3390/electronics8121472
Received: 13 November 2019 / Revised: 23 November 2019 / Accepted: 28 November 2019 / Published: 3 December 2019
(This article belongs to the Section Systems & Control Engineering)
Owing to the superior transient and steady-state performance of the fractional-order proportional-integral-derivative (FOPID) controller over its conventional counterpart, this paper exploited its application in an automatic voltage regulator (AVR) system. Since the FOPID controller contains two more control parameters (µ and λ) as compared to the conventional PID controller, its tuning process was comparatively more complex. Thus, the intelligence of one of the most recently developed metaheuristic algorithms, called the salp swarm optimization algorithm (SSA), was utilized to select the optimized parameters of the FOPID controller in order to achieve the optimal dynamic response and enhanced stability of the studied AVR system. To validate the effectiveness of the proposed method, its performance was compared with that of the recently used tuning methods for the same system configuration and operating conditions. Furthermore, a stability analysis was carried out using pole-zero and bode stability criteria. Finally, in order to check the robustness of the developed system against the system parameter variations, a robustness analysis of the developed system was undertaken. The results show that the proposed SSA-based FOPID tuning method for the AVR system outperformed its conventional counterparts in terms of dynamic response and stability measures.
Keywords: automatic voltage regulator; fractional order PID controller; salp swarm optimization algorithm; dynamic response enhancement; stability automatic voltage regulator; fractional order PID controller; salp swarm optimization algorithm; dynamic response enhancement; stability
MDPI and ACS Style

Khan, I.A.; Alghamdi, A.S.; Jumani, T.A.; Alamgir, A.; Awan, A.B.; Khidrani, A. Salp Swarm Optimization Algorithm-Based Fractional Order PID Controller for Dynamic Response and Stability Enhancement of an Automatic Voltage Regulator System. Electronics 2019, 8, 1472.

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