Abstract
In this paper, operation optimization of integrated energy system based on variable efficiency characteristics of equipment and dynamic characteristics of pipe network is studied. The equipment includes combined heating and power unit, electric boiler, and wind turbine, photovoltaic power generation. An energy hub model based on dynamic efficiency characteristics of equipment is established. At the same time, the dynamic model of thermal pipe network is considered in this paper, while the dynamic process of the pipe network under the change of mass flow is discussed. The operation optimization considering the variable efficiency of equipment and pipe network is studied with the objective of the minimum operating cost. The results show that proposed operation optimization model has better economy, the case shows that the total cost was reduced by about 8.88%. And the thermal dynamic process of the pipeline network is more obvious in the large integrated energy system, that the average time of dynamic process is increased by 31 minutes than that of the small system in the case.
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