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Metering Requirements and Design for an Electric Vehicle Charging System Providing Grid Services

Journal Article
13-01-02-0009
ISSN: 2640-642X, e-ISSN: 2640-6438
DOI: https://doi.org/10.4271/13-01-02-0009
Published December 08, 2020 by SAE International in United States
Metering Requirements and Design for an Electric Vehicle Charging System Providing Grid Services
Sector:
Citation: Bai, K., McGee, R., and Kempton, W., "Metering Requirements and Design for an Electric Vehicle Charging System Providing Grid Services," SAE J. STEEP 1(2):145-152, 2020, https://doi.org/10.4271/13-01-02-0009.
Language: English

Abstract:

Vehicle-to-Grid (V2G) technology is capable of providing grid services from electric vehicles (EVs). To do so, it imposes more demanding engineering design requirements on electric vehicle supply equipment (EVSE). To provide grid services, bidirectional power flow and accumulated energy between grid and EVs must be metered and uploaded to a remote server participating in electricity markets. Requirements, including accuracy and latency of power and energy data, are crucial parameters. In this article, an overview is provided of a built-in metering module, now designed and built into an EVSE charging station. Design decisions and performance include measurement approaches, communication to a higher-level module, and the standards that must be met.