Abstract:
With the low-carbon, clean energy transition, requires an electrolyzer array formed by multiple electrolyzer tanks is required in large-scale wind power hydrogen generation system, and power distribution and state switching of the electrolyzer array are performed to adapt to the volatility of wind power output. In order to further improve the hydrogen production efficiency, hydrogen production, and overall operating life of the electrolyzer array, we proposed an optimized control method for wind power hydrogen electrolyzer array considering the operating characteristics of the electrolyzer. Based on the operating characteristics of the electrolyzer, the efficiency, hydrogen production, start-stop model, and lifetime decay model of the electrolyzer were established to quantify the system optimization targets and related evaluation indexes. An optimal control method for electrolyzer arrays based on historical operation data of electrolyzers is proposed. The operation duration of electrolyzers in each operation state is taken into account, the numbers of electrolyzers operating in overload, variable load, low load, standby, hot start, shutdown, and cold start states, are determined, respectively, and according to wind power, the power allocation and state switching of the electrolyzer arrays are performed. Quantitative analysis and comparison of the optimization results of different scenarios through a multi-scenario setup show that the optimization strategy proposed in this paper integrally improves the hydrogen production efficiency, hydrogen production, operating life and hydrogen profits of the electrolyzer array, which verifies the effectiveness and economy of the proposed method.