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PGDTF:

Attached is the Draft GMD Vulnerability Assessment Scope for your comments.  Please provide your comments back to ERCOT by May 1.

Note that this draft assumes that we will run P1, select P6, and P7 contingencies as a part of this GMD Vulnerability Assessment even though ERCOT is not yet fully committed to running those contingencies as a part of the Vulnerability Assessment.

We can discuss this in greater detail but please note that the standard does not require that the assessment include a contingency analysis, instead it only requires that the assessment Simulate the "GMD Event with Outages" which would include "Reactive Power compensation devices and other Transmission Facilities removed as a result of Protection System operation or Misoperation due to harmonics during the GMD event" but nothing beyond this.  Additionally, recent discussions with other regions thus far have not indicated that other regions have plans to simulate any TPL-001-4 contingencies as a part of their GMD Vulnerability Assessments.

Looking forward to discussing this with you more in the weeks ahead.




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A. Benjamin Richardson, P.E.(Colorado)
Transmission and Interconnection Studies
2705 West Lake Drive
Taylor, TX 76574
O: 512-248-4505 | M:720-470-3643





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