Study on the Wide Range Power Operation of Alkaline Water Electrolyzer Considering the Adjustment of Alkaline Electrolyte Circulation Speed

China is going through a critical period of achieving the “3060” goal, and the development of alkaline electrolysis technology that adapts to the fluctuating renewable energy is of great significance. This article addresses the issue of equipment debugging not reflected in the wide power operation modeling of alkaline electrolysis cells. Based on the gas content model and electrolysis balance, the influence of alkaline solution circulation speed on hydrogen oxygen mixing degree is demonstrated. The case study demonstrates that the hydrogen energy systems can effectively reduce the operating costs of microgrids and significantly improve the consumption rate of renewable energy. When considering operation with wide range power, the cost will further decrease by 4.52%, and the consumption rate will further increase by 2.50%. Moreover, this article verifies that reducing the circulation rate of alkaline solution can effectively reduce the degree of hydrogen oxygen mixing.