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GMD

Geomagnetic Disturbances and the Grid

Harmonics Studies Needed to Assess Vulnerabilities

NERC recently issued reliability standards in response to the potential for geomagnetic disturbances to disrupt operations and possibly damage assets. The power industry appears to have placed undue emphasis on GMD’s threat to transformers. Our studies and those by others have underscored the value to transmission organizations in assessing their vulnerability to harmonics.
Byline: 

David Mueller

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Sun Damage

Geomagnetic storms and the limits of human experience.

On April 30, FERC held a technical conference to review scientific claims and policy arguments about geomagnetic disturbances, known as GMD—how some say that a once-in-a-century solar storm could induce a power surge on the interstate grid so destructive as to cook and fry as many 300 extra-high-voltage transformers, plunging much of the nation into a blackout lasting months or even years. Some researchers even harbor fears that GMDs could end life as we know it.

Byline: 

Bruce W. Radford

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