Thanks Mike for providing the information below. All, At our last TF meeting, we discuss the building of new 2022 SP/MIN GIC system model (based on the recent 2018 SSWG base cases) with a schedule for TSP submission to ERCOT on 10/1/2018. Based on Mark Olson’s responses below, the TF should consider an accelerated schedule for these case updates so that ERCOT can post the final GIC flows (required by NERC on January 1, 2019) using that same cases (2022 SP/MIN) that will be used to conduct the GMD Vulnerability Assessment. Here’s the ask (and topic at the upcoming TF meeting): Can TSPs commit to an accelerated GIC system model update (based on the SSWG18 2022 SP & MIN cases) in advance of the 10/1/2018 date already proposed? Thanks for you thoughtful consideration of this important request. Dylan From: Planning Geomagnetic Disturbance Task Force [mailto:[log in to unmask]] On Behalf Of Juricek, Michael Sent: Tuesday, July 03, 2018 8:03 AM To: [log in to unmask] Subject: NERC response to questions on transformer thermal impact assessment and GMD Vulnerability Assessment ***This message was received from an external source. Beware of attachments and links. Report suspicious emails using the PhishMe button.*** All, Following are the responses from Mark Olson, NERC lead on GMD planning activities, to questions on the requirements for the transformer thermal impact assessment and GMD Vulnerability Assessment required by TPL-007-1. Ian Grant and Emanuel Bernabeu are the current leaders of the NERC GMDTF, and Emanuel served the standard drafting team that developed TPL-007-1. The flow chart was extracted from the Application Guidelines which is part of the Standard. We will be discussing his responses at the July 9th PGDTF meeting. Please review them and be prepared to discuss them at the PGDTF meeting? Thanks, Mike From: Mark Olson [mailto:[log in to unmask]]<mailto:[mailto:[log in to unmask]]> Sent: Monday, June 25, 2018 11:48 AM To: Juricek, Michael Cc: Grant, Ian S; Bernabeu, Emanuel E.; Loyferman, Larisa M. Subject: RE: Questions from Geomagnetic Disturbance Task Force Meeting (GMDTF) | June 13, 2018 - Charlotte, NC Hi Michael- thanks again for joining the GMDTF meeting and providing an update on the work that PGDTF is doing. We became pressed for time during the morning session and weren’t able to have more dialogue on your topics. I discussed with Emanuel and Ian afterward that we may want to look for another opportunity to do a web meeting dedicated to TPL-007 implementation, particularly since we are in an active time with the GIC studies. Here are my responses to your questions…Ian and Emanuel can add their perspectives as they think is needed. -Mark GIC System Models quickly become stale during 60-Month GMD Vulnerability Assessment period. I understand your concern, and some areas are changing more rapidly than others. I think this is a good topic for further discussion/best practices. But the standard is intended to identify risk of voltage collapse from a rare, extreme event. The standards drafting team viewed the 5-year periodicity as appropriate for obtaining a reasonable vulnerability assessment. More frequent assessments can be done by the planning entities. Should the same GIC System Models be used for the GIC calculation for the transformer thermal impact assessment and GMD Vulnerability Assessment? If the TOs and GOs use all 24 months allowed by the standard for their transformer thermal impact assessment, the GIC System Models will be out-of-date when the GMD Vulnerability Assessment is started. When the standard was written, I believe the SDT envisioned the same GIC system model would be used throughout the vulnerability assessment process, including the transformer thermal assessment. The diagram of the GMD Vulnerability Assessment process (in the application guidelines section of the standard, pasted below) implies this. I think this is also a good topic for further discussion with other entities, to understand the extent of the problem in areas and ways to address it. For instance, could updated GIC calculations be obtained when system configuration changes during the GMDVA, which would support engineering judgement of changes to transformer risk. Is the transformer thermal impact assessment part of the GMD Vulnerability Assessment or a separate assessment? Transformer thermal impact assessment should be considered part of the GMDVA (the definition includes damage to equipment). The diagram in the application guidelines section is intended to show including transformer thermal impacts in the assessment process. [cid:image001.png@01D412AD.7DCE20D0] _____________________________ Mark Olson Senior Engineer, Reliability Assessments North American Electric Reliability Corporation 3353 Peachtree Road NE, Suite 600 – North Tower Atlanta, GA 30326 404-446-9760 office | 404-801-5536 cell [log in to unmask]<mailto:[log in to unmask]> Reliability | Accountability This email and any attachments are confidential. They may contain legal, professional, proprietary and/or other privileged information. They also may contain information that is subject to copyright belonging to NERC. This email and any attachments are intended solely for the addressee(s). If you are not the intended recipient, do not use the information in this email in any way, permanently delete this email and any attachments and notify the sender immediately. From: Juricek, Michael [mailto:[log in to unmask]]<mailto:[mailto:[log in to unmask]]> Sent: Tuesday, June 19, 2018 3:16 PM To: Mark Olson <[log in to unmask]<mailto:[log in to unmask]>> Cc: Grant, Ian S <[log in to unmask]<mailto:[log in to unmask]>>; Bernabeu, Emanuel E. <[log in to unmask]<mailto:[log in to unmask]>>; Loyferman, Larisa M. <[log in to unmask]<mailto:[log in to unmask]>> Subject: Questions from Geomagnetic Disturbance Task Force Meeting (GMDTF) | June 13, 2018 - Charlotte, NC Mark, No one at the GMDTF meeting responded to the following concerns/questions about the GIC System Models to be used for TPL-007-1. • GIC System Models quickly become stale during 60-Month GMD Vulnerability Assessment period. • Should the same GIC System Models be used for the GIC calculation for the transformer thermal impact assessment and GMD Vulnerability Assessment? If the TOs and GOs use all 24 months allowed by the standard for their transformer thermal impact assessment, the GIC System Models will be out-of-date when the GMD Vulnerability Assessment is started. • Is the transformer thermal impact assessment part of the GMD Vulnerability Assessment or a separate assessment? The ERCOT PGDTF will appreciate any guidance we can get on these questions. Thanks, Michael Juricek, P.E. Senior Manager, Transmission Planning Assets Planning Distribution and Transmission Oncor Electric Delivery Co LLC Office: 214.743.6671 Mobile: 214.490.0748 Confidentiality Notice: This email message, including any attachments, contains or may contain confidential information intended only for the addressee. If you are not an intended recipient of this message, be advised that any reading, dissemination, forwarding, printing, copying or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by reply message and delete this email message and any attachments from your system. Warning: This email comes from an external sender. Be cautious when opening URLs or attachments from external senders. Confidentiality Notice: This email message, including any attachments, contains or may contain confidential information intended only for the addressee. If you are not an intended recipient of this message, be advised that any reading, dissemination, forwarding, printing, copying or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by reply message and delete this email message and any attachments from your system. ________________________________ To unsubscribe from the PGDTF list, click the following link: http://lists.ercot.com/scripts/wa-ERCOT.exe?SUBED1=PGDTF&A=1 ######################################################################## To unsubscribe from the PGDTF list, click the following link: http://lists.ercot.com/scripts/wa-ERCOT.exe?SUBED1=PGDTF&A=1