Green hydrogen, produced through the water electrolysis system, needs to be compressed to 200-700 bar for transportation, storage, and charging. Thus, it is necessary to consider the compression process of the produced hydrogen. In this study, an alkaline water electrolysis cell model was developed, and a system simulation model was proposed by integrating it into gPROMS. Total energy consumption and efficiency, according to operational conditions, were analyzed by considering the energy consumption for hydrogen compression to 200 bar through the developed model. The optimal operating pressure demonstrated in the previous study was less than 10 bar when the compression process was not considered. However, the energy efficiency was highest at 10-30 bar with the energy required for hydrogen compression. Nonetheless, a high-pressure operation may be subject to material restrictions or legal regulations. Therefore, material constraints and social regulations should be simultaneously considered to minimize the operating costs and maximize energy efficiency.