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کلیدواژهها
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Microgrids, grid-forming converters, Kharitonov Theorem, static output feedback theory, simultaneous tuning, stabilizing parameter tuning, dynamic control systems, robust stability, robust performance.
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چکیده
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In modern power grids, smart converters are essential for integrating renewable energy sources; however, a significant gap exists between technological advancements and theoretical knowledge. While there has been substantial theoretical growth in control methodologies, many of these developments are not directly applicable to industry, which favors simple, reliable, and cost-effective solutions. This thesis addresses the inherent uncertainties in modern power grids, particularly those arising from renewable energy integration, by emphasizing the need for robust control systems that ensure stability and performance. The primary objective is to enhance the existing Proportional-Integral-Derivative (PID) and simple structure controllers without increasing the complexity or cost. To bridge this gap, this research work considers strong control theories, such as Kharitonov’s theorem and the H∞-based static output feedback (H∞-SOF) method. The proposed strategy involves adapting these theories for practical implementation with the existing PID controllers. To validate the results, the MATLAB/Simulink platform, PSIM software, Julia Language, and Typhoon for real-time setups, as well as various experimental configurations such as Myway devices at different stages of the research are employed. The results demonstrate these enhancements significantly improve the robustness of simple structure controllers in terms of stability and performance, thereby providing a viable solution for the challenges faced in the modern power grid applications.
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