IEC 61850-7-4:2010/AMD1:2020 6.13.8 LN: Fault locator Name: RFLO Table 147:
Logical node RFLO:
For a more efficient use of this logical node two additional data objects are needed:
the fault reactance X and the fault resistance R, both in Ohm.
Actually still only FltZ and FltDiskm exist in Measured and metered values, although tissue 810 is green, see https://iec61850.tissue-db.com/tissue/810
Proposal
Add two data objects to the LN RFLO "Measured and metered values":
- FltX, CDC MV, Fault reactance, mandatory
- FltR, CDC MV, Fault resistance, mandatory
Discussion
Created
Status
6 months over
30 Nov 22
In Force (green)
See IEC document 57/2445/INF .
01 Feb 22
Must Implement
New state: Must implement.
01 Feb 22
Must Implement
Solution is accepted.
02 Aug 21
Solution Accepted
Starting ballot period
30 Jun 21
Ballot Period
No change to test procedures needed except reference to new NSD file during batching process
30 Jun 21
Conformance Test Verification
Next step is to prepare/change conformance tests if necessary.
07 Jun 21
Conformance Test Preparation
UC 5a, Extent exusting LN with new DO (otional)
Extension was already agreed in #810 but unfortunately forgotten in ed.2.1
Conclusion: no compatibility issues!
04 Jun 21
Analysis Of Compatibility
Change to Verify Draft Implamentation
13 Apr 21
Verify Draft Implementation
Change to stage: Drafting implementation.
16 Dec 20
Drafting Implementation
Proposal:
Add DO FltX (CDC MV) Fault reactance and FltR (CDC MV) Fault resistance. Presence condition for both:"OFCond(1)"
Change presence condition of FltZ to "OFcond(1)".
Add text before LN table:
Cond(1) Either FltZ or the two DO FltR and FltX should be modelled.
27 Nov 20
Discussion (red)
Some end-user are interested more in FltX/FltR depending on further use of these values. I would agree to make the presence condition "AllOnlyOneGroup(n)", so that only either FltZ or FltX/FltR is present.
02 Nov 20
Discussion (red)
I suggest to refuse this request.
FltZ and the proposed FltX/FltR will contain duplicate information (polar and rectangular representations of the same value).
Only one of the two representations should be modeled.
22 Oct 20
Discussion (red)
FltZ is modelled as optional data object. So FltR and FltX cannot be mandatory.
Shall we modelled FltX/FltR exclusively to FltZ, so there will be no contradication between results of calculation?
Can this extension of RFLO be part of the new amd2.2 or is it a future ed.3 issue?
22 Oct 20
Discussion (red)
Accepted as tissue, discussion is open.
22 Sep 20
Accepted
Unfortunately tissue #810 has not been considered in amd 2.1.
So it would be valueable to open the tissue process/discussion for it.