Today’s LiveWire Spotlight examines TPL-007-2 Draft 1, an extensive re-write of the Geomagnetic Disturbance (GMD) planning standard intended to correct four reliability gaps detected by FERC.  One of the key changes is the introduction of a second “supplemental” GMD Vulnerability Assessment that predicts the electric system response to localized peak geoelectric fields.

The initial draft of TPL-007-2 and its supporting documentation have been posted on the NERC website for a 45-day review and concurrent ballot.  Comments must be returned to the project team by August 11, 2017.