الفهرس 
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Abstract
This study investigates the impact of static var compensator (SVC) and Flexible alternating current transmission system (FACTS) devices on the stability of the power system stabilizer (PSS). In modern electrical networks’ increasing demand and complexity, maintaining stable operating conditions around the equilibrium point has become a significant challenge. The study proposes a coordinated control strategy that involves PSS and SVC devices to damp out low-frequency oscillations (LFOs). This major factor can disrupt power system stability if it does not properly reduce its effect. The advance of this strategy lies in using fractional-order proportional integral-derivative (FOPID) tuned controllers, whose controller constants are optimized using the moth flame optimization algorithm (MFO). The coordination aims to enhance the interaction between the two controllers, increasing the power system stability margin. The study uses the MFO and antlion optimization technique (ALO) to optimize three control schemes: lead-lag (LL-PSS), proportional-derivative-integral (PID-PSS), and FOPID. The study develops four test scenarios to examine the proposed MFO FOPID-PSS & SVC performance under three operating conditions. The researchers used six different indices to evaluate and analyze the impact of coordinated controllers: maximum overshot, settling time, integral absolute of the error (IAE), integral time absolute of the error (ITAE), integral square of the error (ISE), and integral square time of the error (ISTE). ii Numerical analysis confirms that the proposed coordinated controller significantly improves power system stability compared to alternative controllers. The MFO algorithm outperformed ALO, showing a 5% improvement in settling time and a 3% reduction in overshot. In coordinated control, MFO-FOPID-PSS and SVC demonstrated a 12% reduction in settling time and an 11% decrease in overshot compared to individual MFO FOPID-PSS. Finally, the thesis experimentally evaluates the proposed technique using a laboratory developed single machine infinite bus system (SMIB). This system includes a transmission line model, generation set, and load and was constructed entirely in the lab. The experimental evaluation provides a practical validation of the proposed technique and its effectiveness in real world scenarios. The study indicates that the proposed coordinated controller with MFO optimization enhances power system stability, outperforming other configurations and algorithms in various simulation scenarios and real world laboratory tests.