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CIM Issues #6296

New "Transformer Compensated" Quality Code needed in Part 9

Added by David Haynes about 1 year ago. Updated about 1 year ago.

Status:
New
Priority:
Normal
Author/Contact Info:
dhaynes@hubbell.com
Base Release:
Solution to be Applied To:
Solution Version:
Solution Applied By:
Completion Date:
CIM Keywords:
61968-Metering
Breaking Change:
No
Breaking Change Description:
CIM Impacted Groups:
WG14
Requestor:
David Haynes
Standard(s):

61968-9

Version:
4
Clause:
Annex D
Sub-Clause:
Paragraph:
Table:
Originally Closed in Version:
Origination Date:
03/17/2023
Origination ID:
Originally Assigned To:

Description

It is possible for a meter to be connected in primary fashion to the distribution voltage (above the service transformer.) When this happens, transformer losses are not reflected in the measurement. When large amounts of power flow, the 1-2% loss through the transformer accumulates to a considerable amount. Who pays for it? It is an unmetered loss. Usually this can be accounted for by an MDMS, but some high-end meters also offer a transformer loss compensation function. When active, all power measurements are adjusted by the meter. They look like any other measurement, but the compensation has already been applied.
We missed this usecase in our original analysis. The Part 9 team should add a new quality code that provides a new categorization of "compensated" and a new index of "transformer loss." This code could then markup the data and help prevent the compensation from being applied twice.


Proposed Solution

Extend existing quality code enumerations by adding new enumerations to cover the need. We have a code for "estimated" but this is not an "estimated" reading. It is an adjusted reading. The term in use is "compensated"


Release Notes

This issue was originally raised in the UCAIug sharepoint as a specialized UOM, but this was rejected. The better solution is to allow any measurement to indicate with a QC that it has been adjusted / compensated. The UCAIug Part 9 team entry is rejected in order to remove it from the sharepoint, but the issue lives on here in redmine.


Related issues

Related to WG14 Part 9 Issues - CIM Issues #6322: New "Low Loss Potential" Quality Code needed in Part 9NewActions
#1

Updated by David Haynes about 1 year ago

  • Related to CIM Issues #6322: New "Low Loss Potential" Quality Code needed in Part 9 added
#2

Updated by David Haynes about 1 year ago

  • Release Notes updated (diff)
#3

Updated by David Haynes about 1 year ago

  • Subject changed from New Quality Code needed in Part 9 to New "transformer compensated" Quality Code needed in Part 9
  • Proposed Solution updated (diff)
#4

Updated by David Haynes about 1 year ago

  • Subject changed from New "transformer compensated" Quality Code needed in Part 9 to New "Transformer Compensated" Quality Code needed in Part 9

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