National Technology & Engineering Solutions of Sandia, LLC

USA as Represented by Secretary of the Navy

Sandia Corporation

Northern Plains Power Technologies

Lee Joshua Rashkin

Jason C Neely

Steven F Glover

Robert W Brocato

Robert Kaplar

Michael Ropp

Joshua Stewart

Jack David Flicker

Sigifredo Gonzalez

Jarod James Delhotal

Timothy James Donnelly

James Richards

Scott Perlenfein

Kyle Jackson Goodrick

Timothy J McCoy

Norbert H Doerry

David Wilson

Ronald Craig Matthews, Jr

A high altitude electromagnetic pulse (HEMP) or other similar geomagnetic disturbance (GMD) has the potential to severely impact the operation of large-scale electric power grids by introducing low-frequency common-mode (CM) currents which deteriorate the performance of key grid components, such as large power transformers. A solid-state transformer (SST) can replace susceptible equipment and improve grid resiliency by safely redirecting, absorbing, and/or converting these CM insults.

Solid-state transformer for mitigation of common mode insults

A dual-wound machine comprises a dual-wound generator supplying power to two separate powered zones. The generator comprises a wound rotor with a field winding and a stator with two sets of phase windings and a field control loop that controls the excitation voltage applied to the field winding and therefore the magnetic field produced by the rotor, in order to maintain a constant field flux in the generator and mitigate dynamic coupling between the two sets of phase windings when supplying power to unbalanced loads.

Excitation control of dual-wound machines for coupling mitigation

A hybrid switched capacitor power converter for high-power applications is provided. The converter has a transistor-switched input-stage boost converter followed by a capacitor-and-diode ladder circuit. The converter is adapted to produce an output voltage of at least 5 kV at a power level of at least 0.5 kW. The ladder circuit includes one or more multi-stage rails.

Passive high-power-density grid interface device

Systems and methods for identifying an island condition in a power distribution system and disconnecting distributed generators in the case of islanding. The systems and methods are used to enable reliable detection of island formation with high false-trip immunity, for any combination of distributed energy resources, and for distributed energy resources using grid support functions.

Subharmonic power line carrier based island detection systems and methods

Growing community of inventors

Albuquerque, NM, United States of America

Lee Joshua Rashkin