Promoting the development of hydrogen energy storage systems is an important measure to enhance the flexibility of the power grid and implement the “dual carbon” goals. The existing capacity allocation models ignore the dynamic characteristics of electrohydrogen conversion
making it difficult to ensure the economic and applicability of the planning scheme. In response to the issues above
this article considers the variability of the mutual conversion efficiency of electric and hydrogen energy
as well as the impact of optimization electrolytic cell efficiency operation strategies on the capacity configuration of hydrogen energy storage systems. A model for the energy conversion efficiency of electrolytic cells in the electric hydrogen conversion process and a model for the energy conversion efficiency of fuel cells in the hydrogen electric conversion process are established
and the nonlinear problems of the model are solved using the methods such as piecewise linearization approximation. A hydrogen storage capacity configuration optimization model that combines energy conversion efficiency models with optimized operation strategies is proposed. The example compares the hydrogen storage capacity configuration results of three typical daytime traditional schemes and the proposed scheme in this article. The analysis shows that the proposed model can improve the economy and flexibility of the planning scheme.
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School of Mechanical and Power Engineering, Jiangsu Organic Solid Waste Deep Disposal and Hydrogen Production Engineering Research Center,Jiangsu Key Laboratory of Process Enhancement and New Energy Equipment Technology, Nanjing Tech University
College of Energy and Mechanical Engineering, Shanghai University of Electric Power
General Research Institute of Non-ferrous Metals
Department of Chemical Engineer,University of Petroleum
Department of Chemical Engineering,University of Petroleum