The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 2026
Filed:
Feb. 29, 2024
National Technology & Engineering Solutions of Sandia, Llc, Albuquerque, NM (US);
Michigan Technological University, Houghton, MI (US);
Timothy James Donnelly, Albuquerque, NM (US);
David G. Wilson, Tijeras, NM (US);
Rush Robinett, III, Tijeras, NM (US);
Wayne Weaver, Hancock, MI (US);
National Technology & Engineering Solutions of Sandia, LLC, Albuquerque, NM (US);
Michigan Technological University, Houghton, MI (US);
Abstract
A high altitude electromagnetic pulse (HEMP) or solar-geomagnetic disturbance (GMD) can introduce geomagnetically-induced currents (GICs) flowing through grounded power transformers that have the potential to severely impact the operation of large-scale electric power grids. A top-down mitigation design strategy considers grid-wide dynamic behavior during an HEMP/GMD event and uses optimal control theory to determine the compensation signals required to protect critical grid assets. As examples, the approach is applied to both a standalone transformer system, small power 3- and 4-bus systems, and large-power 20-bus system.