1581   Synchrophasor positive sequence cannot be mapped to SEQ cdc

This tissue has following status: green

Created: 18 May 2017

Links:

Page: 38

Clause: 7.4.7

Paragraph:

Category: Issue for edition 2 of this part

Issue: Most of currently available PMUs (Phasor Measurement Units) are able
to compute the positive sequence using synchrophasor filtering algorithms.

In application where we would transmit synchrophasor values using the IEC61850-90-5 TR
transport, this computed value needs to be mapped to the IEC61850 model.

Current there is no possibility to map correctly this value to IEC61850 due to these 2 issues:

1.The PhaseReferenceKind enum type which define the angle reference doesn't
have a "Synchrophasor" value like the PhaseAngleReferenceKind has.

2.Most PMUs only computes the positive sequence using PMU algorithms, but
the SEQ cdc doesn't allow a single sequence to be present (c1,c2,c3 are
all Mandatory).

Proposal: To fix these 2 issues I would propose:

1.Add an enum value to the PhaseReferenceKind enum as follow:
<EnumVal ord="3">Synchrophasor</EnumVal>

2.In the SEQ cdc, change c2 and c3 From Mandatory to Optional in case where
phsRef attribute is "Synchrophasor".

Discussion Created Status
?
Ballot until Editor
21 Oct 18 green
Issue will be applied to next Revision (Amd 1)

Suggest Proposal as Final Proposal:
- Add "Synchrophasor" to enumeration
- In SEQ, change condition of c2 and c3 to OMSynPh - Optional if value of PhsRef is "Synchrophasor", otherwise mandatory
26 Apr 18 final proposal 26.4.18

 

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