Low-carbon Optimal Scheduling of Electric Vehicles With High Spatiotemporal Resolution
Main Article Content
Keywords
carbon emission flow, dynamic carbon emission factor, electric vehicles, energy storage system, low-carbon, scheduling
Abstract
As electric vehicles (EVs) become increasingly connected to power systems at scales, their emission reduction benefits no longer depend merely on whether the vehicles themselves are zero-emission, but are also closely related to charging time, charging loc ation, and the carbon intensity of electricity sources. In order to reduce indirect carbon emissions of charging for EVs, a user-side low-carbon optimal scheduling framework for EVs is established, in which dynamic electricity pricing, energy storage system operation, charging characteristics of various EV types and dynamic carbon emission factor are considered. Firstly, based on the carbon emission approach, user-side electricity consumption behavior is associated with nodal carbon intensity, which provides a theoretical basis for evaluating the carbon footprint of EVs. Secondly, through dynamic pricing mechanisms and real-time electricity trading prices, electric vehicles are encouraged to charge during low-load or low-carbon periods, while energy storage systems are coordinated for charging and discharging operations to improve the peak-to-valley load profile. Lastly, experiments are conducted to analyze the variation patterns of optimized electricity price curves, categorized EV charging power behaviors, storage system operating conditions, and the variations in dynamic marginal carbon emission factors and overall carbon emission factors. The experimental results indicate that electricity price signals alone are insufficient for user-side low-carbon scheduling, and that dynamic carbon emission factors should also be taken into account.
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