The following email provides clarification on TPL-007-2 and TPL-007-3.






From: Mark Olson [mailto:[log in to unmask]]
Sent: Wednesday, March 06, 2019 6:20 AM
To: [log in to unmask]
Cc: Alison Oswald; Soo Jin Kim; Bernabeu, Emanuel E.; [log in to unmask]
Subject: TPL-007


Good morning- I wanted to make GMDTF members aware of two recent communications from NERC Standards related to TPL-007. First, the attached standards and compliance bulletin was sent to the NERC compliance contacts at registered entities. It includes a section about the transition from TPL-007-2 to TPL-007-3, pasted below. In summary, the TPL-007 requirements are timed to come into effect in the U.S. as before. With the approval of TPL-007-3, the requirements come from that standard and TPL-007-2 is superseded:


NEW Effective Date for TPL-007-3 – Transmission System Planned Performance for Geomagnetic Disturbance Events

TPL-007-3 – Transmission System Planned Performance for Geomagnetic Disturbance Events was adopted by the NERC Board of Trustees on February 7, 2019. Version 3 of the standard adds a Variance for Canadian entities. No continent-wide requirements are changed. In the United States, TPL-007-3 will supersede TPL-007-2 prior to TPL-007-2 ever becoming effective. All phased-in compliance dates from the TPL-007-2 implementation plan are carried forward unchanged. For more detailed information on phased-in effective dates, please refer to the Standards Subject to Future Enforcement chart (page 6-7 in the attached).


Second, two announcements were recently sent to industry (attached) for the start-up of the standards project to develop modifications to the TPL-007. This project will address FERC’s directives in Order No. 851. Those interested in serving on the standards drafting team should provide their nomination by March 26 as specified in the announcement.


Alison Oswald, cc’d above, is the NERC senior standards developer that will be working on the standards project. You can contact her if you need more information.





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

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Reliability | Accountability

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