Cascaded Lyapunov-Based Hybrid Control of Multiphase Interleaving Converters for Power-to-Hydrogen in DC Microgrid

In this article, the control of a photovalatic (PV)-battery-based dc microgrid is presented to power an electrolyzer-based hydrogen system. The three-phase interleaving topology is considered for three different converters: an interleaving boost converter, an interleaving four-switch single-inductor buck–boost converter, and an interleaving buck converter. MPPT and droop-based control are recommended for maximum power extraction from the PV system and regulation of the dc-bus voltage. A cascaded hybrid nonlinear controller is developed for current and voltage control, merging the advantages of both linear and nonlinear control theory. The design ensures an uninterrupted power supply to the electrolyzer for hydrogen production. The algorithm is simulated in MATLAB/Simulink and validated through rapid control prototyping using a TI C2000 microcontroller unit (MCU) and a Typhoon 404 device for real-time results. Moreover, a comparative analysis with other state-of-the-art control structures is also presented to show the efficiency of the proposed controller. The simulation results, comparative analysis, and hardware results under different conditions confirm the adaptability of the proposed control algorithms for real applications.