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Planning Geomagnetic Disturbance Task Force

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Planning Geomagnetic Disturbance Task Force <[log in to unmask]>
Date:
Tue, 28 May 2019 19:52:27 +0000
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***** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials. *****

PGDTF,

Pass 3 ended last Friday, 5/24/2019. There are still a number of entities that have not made a submission or confirmed they had no changes. Please either submit your changes or reply saying you had no changes to submit for pass three ASAP.

If you have any questions, don't hesitate to call or email me.

Thanks,

Eric


[cid:image001.jpg@01D16FE2.A112C930]<http://www.ercot.com/>


Eric Meier
Network Model Engineer 2
Network Model Administration
2705 West Lake Drive
Taylor, Texas 76574
[log in to unmask]
O: 512-248-6770





From: Planning Geomagnetic Disturbance Task Force [mailto:[log in to unmask]] On Behalf Of Meier, Eric
Sent: Friday, May 10, 2019 12:50 PM
To: [log in to unmask]
Subject: GIC Model Building Pass Three


***** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials. *****

***** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials. *****
PGDTF,

The materials for Pass 3 of the GIC Model Build have been posted to MIS. For this pass the expectation is that the branch table will be fully updated along with any other corrections and updates that need to be made to materials and tables covered in previous passes.

Due to modeling deficiencies, we were not able to calculate flows at the end of Pass Two due to two major issues. These issues MUST be corrected before we have functional models that are able to calculate flows. They must be corrected by the end of Pass 3.

1.       There are buses missing from the GIC DC Model that are in the GIC AC Model.

2.       There are transformers split between stations. For example, one bus of the transformer is in Station A and the other bus of the transformer is in Station B.

There are other issues that were discovered while trying to find GIC flows but did not cause PSSE to error out. These are:

1.       Shunts in the DC Model but not in the AC Model.

2.       Branches in the DC Model but not in the AC Model.


All of the issues listed above can be found in the GIC File Errors to be Fixed text file located in the GIC Pass Three Materials - Data Issues folder.

In the MIS postings under: GIC Case Build Pass Files, there is a zip file with all the necessary materials. Inside the zip file is a folder called Data Issues. Please review the sheets in there and make corrections based off of them if the equipment is yours. A new full database validation has also been included along with the line data issues spreadsheet that was released in the previous passes (which has not been updated).

Please update the branch table as needed, removing lines from the DC model that do not exist in the AC model, and adding lines to the DC model that exist in the AC model but not the DC model. Also, update line attributes as needed.

Pass 3 End Date: 5/24/2019



[cid:image003.png@01D51564.F754F270]

If you have any questions please call or email me.

Thanks,

Eric


[cid:image001.jpg@01D16FE2.A112C930]<http://www.ercot.com/>


Eric Meier
Network Model Engineer 2
Network Model Administration
2705 West Lake Drive
Taylor, Texas 76574
[log in to unmask]<mailto:[log in to unmask]>
O: 512-248-6770






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