Improvement of Fractional-Order Sliding Mode Control in Hydrogen Fuel Cell Grid-Connected Systems Based on RBF Algorithm

In recent years, there has been widespread attention on integrating new energy sources such as hydrogen fuel cells into microgrids. This article proposes an improved fractional sliding mode control for a hydrogen fuel cell grid-connected system based on the RBF algorithm. Firstly, establishing a mathematical model of the hydrogen fuel cell, its input characteristics and power characteristics are analyzed. Then, the fractional-order sliding mode control (FOSMC) algorithm is used to track the grid-connected current and obtain the control rate. To reduce chattering and enhance the system’s robustness, the RBF algorithm is used to improve the fractional-order sliding mode, allowing the sliding mode parameters to be adjusted based on the actual output error. Finally, simulation experiments were conducted using MATLAB/Simulink to verify the feasibility of the hydrogen fuel cell grid connection using the improved fractional-order sliding mode control scheme.