Abstract
With the complexity of energy types and coupling relationships in the integrated energy system, the calculation of energy flow becomes more complicated and requires more convenient analysis methods. To solve this problem, this paper proposes a unified energy flow algorithm for integrated energy system. The algorithm abstracts the common coupling equipment between various energy as an energy hub (EH), and constructs the EH state variable column vector to participate in the iterative calculation of the unified energy flow of electricity, heat, natural gas systems. In order to consider the coupling relationship between multiple energy flows, hydrogen is also added to the EH model as a load in this paper. Finally, it is verified on the improved IEEE39-NGS20-HEAT5 example, which proves the feasibility of the algorithm. The results show that the algorithm can improve the convergence and reduce the computational burden.
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