Distributionally robust optimization; District heating system; Integrated energy systems; Natural gas network; Second-order cone programming; Vehicle-to-grid; Multi-energy systems; Natural gas networks; Renewable energies; Robust optimization; Vehicle fleets; Vehicle to grids; Energy Engineering and Power Technology; Electrical and Electronic Engineering
Abstract :
[en] The widespread adaptation of electric vehicles will extend their impact from power systems to natural gas and heating networks since these energy systems are delicately interconnected. This study investigates uncoordinated and coordinated charging control strategies of electric vehicle fleets (EVFs) in network-constrained multi-energy systems (NMES). A mixed-integer second-order cone programming (MISOCP) model is presented to capture the nonlinearities in EVFs battery degradation cost, power flow equations of the electric distribution system (EDS) and natural gas network (NGN). To deal with uncertain renewable energy production, a Wasserstein-based distributionally robust optimization (DRO) framework is applied. Moreover, the behavioral uncertainties in EVFs’ traveled distance and arrival/departure times are also taken into account. The model is implemented on two different NMES sizes (one small and one large benchmark systems) to assess the models functionality and scalability in real-world applications. The outcomes illustrate how smart and uncoordinated EVF charging strategies can impact each of these networks, while the proposed DRO model leads a conservative estimation over the probability distribution functions of renewable energy production. Most notably, using the smart charging strategy led to 50.55% reduction in the operational costs of the small test system and 27.83% for the large test system. Furthermore, despite the lowered risk and heightened reliability, the application with DRO model showed 23.67% and 5.88% higher cost for the small and large systems, respectively.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Zeynali, Saeed; SnT, University of Luxembourg, Luxembourg, Luxembourg
This work was supported by the Luxembourg National Research Fund (FNR) LightGridSEED Project, ref. C21/IS/16215802/LightGridSEED . For the purpose of open access, and in fulfilment of the obligations arising from the grant agreement, the author has applied a Creative Commons Attribution 4.0 International (CC BY 4.0) license to any Author Accepted Manuscript version arising from this submission.
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