https://doi.org/10.6028/NIST.TN.2217
G.3. Modeling of Return to Service After Trip
LN DCTE has two attributes whose usage is unclear regarding the permit service requirement. IEC 61850-7-420 provides the following information:
• RtnSrvAuth: “Authorization setting that permits the DER to return to service. True = authorized; false = not authorized. If true, the DER may or may not initiate the return to service process, depending on other factors. The CeaEngz command sets this setting to false [3].”
• RtnSrvAuto: “If true, the DER is authorized to automatically return to service; if false, the DER must wait until an external RtnSrvAuth is received to allow it to return to service [3].”
Proposal
NOTE on IEC 61850-7-420: It is recommended to remove RtnSrvAuto and use RtnSrvAuth only with a changed semantic, to indicate permit service. If true, and the conditions are met, DER will return to service.
Discussion
Created
Status
WG17 February minutes: more explanation is required in the document, for example a table showing how the combination of DO states affect the return to service
07 Nov 23
Accepted
Discussed in WG17 February 2023
Documentation to be improved.
RtnSrvAuto is a setting, typically set during installation
RtnSrvAuth is a control, sent from the grid operator at the appropriate time.
RtnSrvAuto RtnSrvAuth
False False Wait for RtnSrvAuth command = true
False True Return to service now allowed
True N/A Return to service always allowed