Research on collaborative control strategy for photohydrogen storage DC microgrid

Hydrogen energy is regarded as one of the future development directions of the energy industry due to its advantages of cleanness, high energy density, and long-term storage in large quantities. In this paper, based on the photovoltaic hydrogen storage DC micro grid, the operation characteristics of each unit are analyzed, and the mathematical model of the photovoltaic array, battery, and hydrogen storage tank is constructed. A collaborative control strategy with bus voltage as the transmission signal and considering the operation characteristics of each unit is proposed, and a control strategy considering SoC is proposed for energy storage batteries to ensure the safe operation of energy storage batteries. For photovoltaic power generation, a power-voltage droop control strategy is proposed, which can make the photovoltaic power generation smoothly transition from the maximum power point mode to the reference power point mode. For the hydrogen production unit, a control strategy for the adaptive transition between the maximum efficiency point and the maximum power point operation mode is proposed. Through numerical examples, the above control strategies can effectively realize the stable operation of the micro grid system and the effective consumption of photovoltaics.