Abstract
This study delves into the intricacies of power system stability, specifically addressing the challenges posed by integrating renewable energy sources, primarily focusing on wind power. The intricate dynamic interactions between Synchronous Generators (SGs), Doubly Fed Induction Generators (DFIGs), and Battery Energy Storage Systems (BESS) under varying operating conditions necessitate advanced control strategies for effective stabilization. Conventional control methods, such as Power System Stabilizers (PSS) and damping controllers, are scrutinized for their inherent sensitivity to system changes and limitations in mitigating the dynamic complexities arising from integrating Wind Farms (WFs) and BESS. This research accentuates the critical need for synchronized control mechanisms to preempt dynamic instability in power systems, considering factors like wind speed fluctuations, WF integration intricacies, and responses to severe disturbances. The introduction of DFIG-based WFs is particularly examined for its impact on altering system inertia, leading to Low-Frequency Oscillations (LFOs) and diminished damping, thereby heightening stability concerns. The proposed control strategies encompass the integration of BESS, PSS, and coordinated damping controllers meticulously tailored to counteract systemic instability. Recognizing the potential inadequacy of individual control methods during severe disturbances, the study underscores the imperative of synchronized operation between PSS and BESS damping controllers. Furthermore, the investigation sheds light on the pivotal role of uncertainties in power system stability, advocating for a paradigm shift from deterministic methods to more nuanced probabilistic approaches. The proposed coordinated probabilistic control designs, leveraging participation factors for SGs, DFIGs, and BESS, offer a sophisticated solution to mitigate uncertainties and fortify system stability across diverse conditions. A rigorous evaluation employing Real-Time Digital Simulator (RTDS) simulations on the IEEE 9-bus test system substantiates the practical efficacy of the proposed coordinated control approach. The discerned outcomes underscore discernible enhancements in both small signal and transient stability, affirming the practical viability and reliability of the advanced control strategies delineated in this study.
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