Optimization of hydrogen production power，electrolytic cell model，and voltage fluctuation at the grid connection point of the electrolytic cell can enhance the efficiency of hydrogen production in the system and increase the hydrogen yield and profits.The voltage variability at the grid connection point of the electrolytic cell results in changes in the reactive power demand of the electrolytic cell，which affects electrolytic current and diminishes hydrogen production efficiency.An energy management optimization strategy considering the voltage impact at the grid connection point of the electrolytic cell is introduced.First，a model of the reactive power demand of the electrolytic cell and its impact on hydrogen production efficiency is established.Then，system hydrogen production efficiency is optimized by comprehensively considering objectives such as hydrogen production and line losses，and the reactive power outputs of photovoltaics，wind power，and the power grid are coordinated.Finally，the effectiveness of the proposed management strategy is verified through examples.The research results demonstrate that the proposed energy management strategy can enhance hydrogen production by 7.51%，mitigate voltage fluctuations at the grid connection point of the electrolytic cell，and significantly improve the hydrogen production efficiency of the electrolytic cell，while ensuring electrolytic cell consumption and full consumption of power generation with an increase in line loss.