Abstract
Background: DC-DC Boost Converters are crucial components in solar power systems, requiring effective control for optimal performance. This paper introduces an adaptive sliding mode controller with a modified sliding function to overcome the limitations of classic sliding mode control in DC-DC boost converters. Materials and Methods: The study presents a detailed mathematical model of the DC-DC boost converter and derives a state-space representation. A Proportional-Integral (PI) type sliding function is proposed, introducing an additional tuning parameter γ that can be adaptively adjusted based on load variations. The control law and existence conditions for sliding modes are established, demonstrating the robustness of the proposed method to load changes. Results: Simulation results compare the performance of the proposed PI-type sliding mode control (SMC) with classic SMC for a DC-DC boost converter under varying load conditions. The PI-type SMC demonstrates superior dynamic performance, recovering from a sudden load change in 10 ms compared to 30 ms for classic SMC. Conclusion: The proposed PI-Type Sliding Function for DC-DC Boost Converters in solar power systems offers improved adaptability to load variations and faster dynamic response, potentially enhancing the efficiency and reliability of solar power systems.
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