An Application Protocol communicates information and commands between the Distribution Utility Operator and DERs such as:
Nameplate ratings/device capabilities
Requests – e.g., load reduction
Event Optin or Optout
Settings of devices
Status of devices
The initial focus of GEI is on the leading application-level protocols for the grid edge: DNP3, IEC 61850, IEEE 2030.5, IEEE 1547/UL 1741, OpenADR, SunSpec Modbus – as opposed to the transport layer protocols (Wi-Fi, Zigbee, Wi-SUN, etc.).
Note: an application protocol could be sent over any communications network that supports the protocol – wireless, cable, satellite, RF, Fiber optic, etc.