Communication for Smart Charging of Plug-in Electric Vehicles Using Smart Energy Profile 2.0
|Publication Date:||1 August 2019|
This document describes the details of the Smart Energy Profile 2.0 (SEP2.0) communication used to implement the functionality described in the SAE J2836-1 use cases. Each use case subsection includes a description of the function provided, client device requirements, and sequence diagrams with description of the steps. Implementers are encouraged to consult the SEP2.0 schema and application specification for further details. Where relevant, this document notes, but does formally specify, interactions between the vehicle and vehicle operator.
The primary purpose of SAE J2847-1 is specifying the communications needed for grid-optimized energy transfer for plug-in electric vehicles (PEV); that is, ensuring that vehicle operators have sufficient energy for driving while enabling the delivery of that energy to vehicles in ways that minimize stress upon the grid or reduce customer costs. This can be accomplished, for example, by vehicle owners' voluntary participation in a utility controlled-charging program in return for incentives, and the specification therefore supports information flows that enable such mechanisms.1
This specification supports forward power flow (FPF) energy transfer from the grid to the vehicle to charge the vehicle's rechargeable energy storage system (RESS). Implementation of SAE J2847-1 is encouraged for enabling utility or premises Energy Management System (EMS)-controlled charging load management and demand response incentive programs and vehicle communication with home area network (HAN) SEP2.0 communications-capab
Reverse power flow (RPF) is the transfer of power from the vehicle to the grid and is used to provide the utility sources of power to augment ancillary and regulatory services to control the reliability of the grid, such as to prevent grid outages. PEV-to-utility-grid communications for RPF is specified in SAE J2847-3.
Beyond its primary purpose of energy transfer, SAE J2847-1 enables other applications between vehicles and the grid, such as vehicle participation in a utility-controlled charging plan (as noted above), or participation in an HAN of SEP2.0 communications-capab
1 Such programs exist for other large electrical loads, such as air conditioners, and it is an explicit goal of the specification to support information flows that enable such mechanisms for plug-in vehicles. This will enable systems that distribute the economic and environmental benefits of plug-in vehicles to all market participants, thereby ensuring faster market development.