Abstract
The integrated energy system(IES)can greatly mobilize the synergies between different energy sources and improve the comprehensive energy utilization efficiency. As the premise of optimal control, modeling has become an important research direction of IES in recent years. In this paper, a standardized segment modeling method for IES based on energy hubs is proposed to realize matrix description of complex multi-energy flow structures. On the basis of graph theory, the complex IES is divided into several simple interconnected parts by means of the arrangement of energy conversion units (ECU) and the insertion of virtual ECU. By solving and multiplying the coupling matrix of each part step by step, the energy hub model of complex IES is constructed. On this basis, a case study is carried out and an optimal operation model is proposed to minimize the daily operation cost of a park IES. The simulation results show that the modeling method can not only effectively describe the multi-energy flow model of IES including renewable energy and energy storage devices, but also ensure the solution accuracy and efficiency in the optimization operation.
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