Reduced grid operating costs and renewable energy curtailment with electric vehicle charge management

TitleReduced grid operating costs and renewable energy curtailment with electric vehicle charge management
Publication TypeJournal Article
Year of Publication2019
AuthorsSzinai, Julia, Colin Sheppard, Nikit Abhyankar, Anand R Gopal
JournalEnergy Policy
Pagination111051
Date Published11/2019
ISSN03014215
Keywordselectricity grid, Mobility model, Plug-in electric vehicles, renewable energy, Smart charging, Time-of-use electricity rate
Abstract

Widespread adoption of plug-in electric vehicles (PEVs) and renewable energy (RE) can help to jointly decarbonize the transportation and electricity sectors. Previous studies indicate strategies to manage PEV charging facilitate integration of RE into electricity grids, but the value of such strategies at scale is unclear because electricity markets and PEV charging have been inadequately represented together. This analysis focuses on the state of California in 2025, and improves on prior work by linking high-resolution mobility and grid dispatch models to quantify the value of managed charging under a 50% RE grid and PEV adoption scenarios up to California's 5 million vehicle target. Even after accounting for practical charging and grid constraints, 0.95 to 5 million “smart” charging PEVs avoid $120 to $690 million in California grid operating costs annually (up to 10% of total costs) and reduce RE curtailment up to 40% relative to unmanaged PEVs. Overnight time-of-use (TOU) charging provides similar cost savings but increases curtailment. Both of these managed strategies defer system infrastructure expansion at the 5 million PEV deployment. The results suggest residential smart charging complemented by TOU tariffs with added daytime periods are policies with most potential to advance California's dual PEV and RE goals.

DOI10.1016/j.enpol.2019.111051
Short TitleEnergy Policy