US 12,289,344 B2
Cybersecurity in electric power systems
Gregary C. Zweigle, Pullman, WA (US); Eric J. Hewitt, Moscow, ID (US); and Matthew J. Halladay, Moscow, ID (US)
Assigned to Schweitzer Engineering Laboratories, Inc., Pullman, WA (US)
Filed by Schweitzer Engineering Laboratories, Inc., Pullman, WA (US)
Filed on Oct. 14, 2022, as Appl. No. 18/046,671.
Prior Publication US 2024/0129339 A1, Apr. 18, 2024
Int. Cl. H04L 29/06 (2006.01); H04L 9/40 (2022.01)
CPC H04L 63/20 (2013.01) [H04L 63/105 (2013.01); H04L 63/164 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A local controller system configured for use in an electric power system, comprising:
a measurement subsystem to receive a plurality of conditions related to electrical conditions in a microgrid;
a communication subsystem to:
transmit a set of data related to conditions in the microgrid to a remote controller using a data diode connected to the local controller system to allow the transfer of data in only one direction such that the data diode physically ensures that communication from the local controller system to the remote controller includes no possibility of a hidden alternate path back to the local controller system through a downstream path; and
receive a plurality of requests in a non-routable fixed format for control actions from the remote controller;
an analysis subsystem to:
generate an assessment of the plurality of requests for control actions in relation to the plurality of conditions related to electrical conditions in the microgrid; and
identify a subset of the plurality of requests for control actions from the remote controller for execution based on the assessment; and
a control action subsystem to issue a control action to an asset in the microgrid corresponding to the subset of the plurality of requests for control actions from the remote controller.