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Enhanced renewable integration for power system stability

Figure 20. Rotor angle deviation with FACTS
controllers and renewable energy integration
Abbreviations: ACO: Ant colony optimization;
FACTS: Flexible Alternating Current Transmission
System.
Figure 18. Rotor angle deviation over time experimental validations were conducted using the
Abbreviation: ACO: Ant colony optimization. IEEE 30-bus system, demonstrating its applicability to
modern power grids with high penetration of renewable
energy sources.
Figure 20 illustrates the impact of renewable energy
integration on ∆δ in a power system employing ACO-
optimized FACTS controllers (SVC, STATCOM, SSSC,
and UPFC). The comparison between systems with and
without ACO-based FACTS controllers demonstrates
their effectiveness in damping LFOs. With renewable
energy sources integrated, the system exhibits improved
stability, reduced deviations, and better synchronization,
ensuring enhanced dynamic performance under varying
loading conditions. These results validate the efficiency
of ACO-based FACTS controllers in mitigating
oscillations and enhancing power system stability.

6. Conclusion
Figure 19. Rotor angular frequency deviation
Abbreviation: ACO: Ant colony optimization. This study introduces an optimized FACTS controller
design incorporating ACO to enhance power system
ratios, rotor angles, and time-domain responses of stability, with an additional focus on renewable energy
the recommended ACO technique against a baseline integration. The results demonstrate that the ACO-
system under varying loading scenarios. Results based tuning method significantly improves system
demonstrate that the proposed ACO method effectively performance by reducing overshoot, shortening settling
reduces LFO and improves the dynamic stability of time, and enhancing voltage stability when compared to
power networks. In addition, the study includes the conventional controllers. As shown in Figure 17, the ∆δ is
integration of intermittent renewable energy sources, significantly reduced when ACO-based FACTS controllers
such as solar and wind power, to assess their impact on are combined with renewable energy integration. The
system stability. The ACO-based FACTS controllers deviation stabilizes more rapidly and exhibits reduced
effectively mitigate the fluctuations introduced by oscillations compared to the system without ACO,
renewable energy sources, ensuring smoother power highlighting the beneficial impact of integrating renewable
system operation. These findings demonstrate that sources with optimized FACTS control.
the proposed model is effective in resolving the issue Key contributions of this work include improved
of LFO in power systems. Simulation, modeling, and damping of interarea oscillations, more efficient power

Volume 22 Issue 2 (2025) 165 doi: 10.36922/ajwep.8393