Today’s LiveWire Spotlight examines the initial version of TPL-007-1, which will govern transmission system planning preparedness for geomagnetic disturbances (GMD). The standard consists of 8 requirements – some with multiple sub-requirements – aimed at assessing system performance in response to geomagnetically induced currents and taking corrective actions accordingly.

The initial draft of TPL-007-1 and its support documentation has been posted on the NERC web site for a 30 day informal review period. Clients have until May 21, 2014 to return comments on the standard to the project team.