Two-layer optimization of regional integrated energy system configuration and dispatching considering exergy efficiency
For regional integrated energy system containing a high proportion of renewable energy,"quantity"and"quality"of energy are both discussed under"Exergy"concept and a two-layer optimization method considering exergy efficiency is proposed.Firstly,a model of multi-energy coupling of electricity,gas,heat and cold was established,and exergy analysis of energy and equipment is implemented.Then,a two-layer optimization model is established that considers system capacity planning and dispatching operation.The upper layer takes exergy efficiency and economy as the optimization goal for capacity allocation,while the lower layer takes the lowest operating cost as the optimization goal for unit output,therefore the best capacity allocation and operation scheduling scheme are obtained.Finally,a regional integrated energy system case is selected,and different schemes are analyzed for comparison.The result shows that the two-layer optimization method proposed in this paper can provide a better planning and scheduling scheme for the regional integrated energy system,while the exergy efficiency can characterize the actual level of energy utilization precisely and achieve high-quality energy use.
regional integrated energy systemstwo-layer optimizationexergy efficiencycapacity configurationoperation dispatching
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