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IEC61850-7-5 #7129

Autorecloser sequence is inconsistent

Added by Keith Gray 27 days ago. Updated 27 days ago.

Status:
New
Priority:
Normal
Assignee:
-
Start date:
02/10/2025
Due date:
% Done:

0%

Source:
2024 IOP
Category:
Not yet categorized
TF 7-5 Project document:
IEC 61850-7-500
Related TISSUE:

Description

FBPCU trips, RREC.AutoRecSt=TripFromProtection,
then RREC.AutoRecSt=FaultDisappeared and XCBR.Pos=open (105ms),
then RREC.AutoRecSt=WaitToComplete and OpCls=true (2ms later),
RREC.AutoRecSt=FaultDisappeared (2ms later),
then RREC.AutoRecSt=WaitToComplete again and Tr=false (110ms later),
then CBclosed OpCls=false and Pos is closed (15ms)
and RREC.AutoRecSt=Sucessfull (less than 1ms).

Files

clipboard-202502071356-sbvf4.png View clipboard-202502071356-sbvf4.png 51.5 KB Christophe CAMELIS, 02/07/2025 06:56 AM
#2

Updated by Michael Haecker 27 days ago

  • TF 7-5 Project document IEC 61850-7-500 added
  • TF 7-5 Project document deleted (-)

Issue

Autoreclosure state machine and associated states

Implementations in existing devices do not perform exactly according to the state machine.
Although there is a statement in IEC/TR 61850-7-500 "[LN RREC] describes the states the autoreclosure function may reach, ...", there is the expectation that devices would have to perform in accordance with the state machine.

Proposal

IEC/TR 61850-7-500 needs to state that this is a suggested state machine or make it mandatory when it becomes a TS.

As per UCAIug IEC 61850 2024 IOP problem report #6961
https://redmine.ucaiug.org/issues/6961

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