1961   FrequencyActivePowerLN constraints

Created: 13 Feb 2025

Status: Drafting Implementation

Part: Part 7-420 (2021; Edition 2, DER)

Links:

Page: 348

Clause: A.3.2.4.4.4

Paragraph: Table A.83

Issue

Problem reported by j61850DocBuilder 2.04

[main] ERROR IEC61850_7_420 AbstractLNs7_420GridCodeModes::FrequencyActivePowerLN : [constraint 'AllOnlyOneGroup(1)' for inexisting 'DepRef']

Proposal

Analysis
Believed due to name change to HzWCrvRef
HzWCrv has constraint AllOnlyOneGroup(1)

WGra and ChaWGra are both AllOnlyOneGroup(2)

Proposal
Change constraint AllOnlyOneGroup(1) to refer to HzWCrvRef

Discussion Created Status
HzWCrvRef should apply to the set of curves. It is not multi.
it is mandatory if HzWCrv curves is/are defined
Constraints to be set appropriately.
14 Nov 25 Drafting Implementation
Accepted for discussion 04 Nov 25 Discussion (red)
Discussed briefly in WG17 meeting 4th March 2025 04 Nov 25 Accepted
Also correct description for HzWCrv

yVal = active power or percent of WMax for generation and ChaWMax for consumption set by HzWCrvRef 		04 Mar 25 Triage

 

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