A Grid‐Connected System of Hydrogen Fuel Cells Based on an Improved Super‐Twisting Sliding Mode Algorithm

To address the slow response and large errors of traditional sliding mode controllers when integrating hydrogen fuel cells into microgrids, a control strategy based on the RBF‐improved ultra‐spiral sliding mode algorithm is proposed. In this scheme, a dual closed‐loop PI control method is used to ensure the quality of the output voltage from the boost converter. In the main circuit, PQ control is applied to obtain the desired current, which is then fed into the ultra‐spiral sliding mode controller along with the actual output current of the circuit. To overcome the difficulty in selecting sliding mode control parameters, the RBF algorithm is used to fit appropriate parameters. The effectiveness of the proposed control scheme is verified through MATLAB/Simulink simulations. Simulation results show that the proposed control scheme outperforms traditional PI control.