The invention relates to a method for designing a multimodal energy system having a plurality of components, comprising the steps: providing a plurality of parameters; determining a plurality of secondary conditions; and determining at least one target function. The method according to the invention is characterized by determining at least one critical operating state (42) of the multimodal energy system; and extremalizing the at least one target function as a function of the parameter, the secondary conditions and the at least one critical operating state (42) by means of an optimizing method. The invention further relates to a multimodal energy system.
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