Coordinated control of electric-hydrogen hybrid energy storage for multi-microgrid with fuel cell/ electrolyzer/ PV/ battery

The AC system with multiple microgrids containing photovoltaic/battery/fuel cell in parallel operation is affected by the difference of line impedance, and the effect of the system operation is not satisfied, such as the active power cannot be reasonably distributed. Combining the good robustness of the super-twisting algorithm (STA) method, a P-Usi inverse droop control method (ST-PDC) based on STA is proposed. The ST-PDC realizes the adaptive adjustment of the active power reference value and reasonable power distribution. According to the storage state of the hybrid energy storage system, a system management strategy is adopted to distribute power to each distributed generation of the solar-hydrogen-electric DC microgrid. Finally, experiments are realized by the RT-LAB real-time platform, and the feasibility and effectiveness of the ST-PDC method are verified through real-time operation compared with 3 other methods. The experimental results indicate that the proposed method can make the system run stably, with reasonable power distribution, short response time, and improved accuracy of the bus voltage.