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Securing Against Malicious Control of Circuit Breakers in Electrical Substations

United States Patent Application

20170163029
A1
View the Complete Application at the US Patent & Trademark Office
An example method for detecting and mitigating attacks on electric power substations comprises detecting a command to open or close a circuit breaker in the electric power substation. A modified extended substation model for the electric power substation is generated, based on the detected command and based on measurements in substation, where the modified extended substation model is a power flow model for the substation and for one or more directly connected neighboring substations. A power flow analysis is performed, using the modified extended substation model, to generate a predicted voltage for each of a plurality of nodes in the substation and in the one or more directly connected neighboring substations. Each predicted voltage is compared to a corresponding allowable voltage range, and execution of the command is blocked in response to determining that one or more of the voltages is outside the corresponding allowable voltage range.
Hong, Junho (Raleigh, NC), Nuqui, Reynaldo (Cary, NC)
14/ 958,570
December 3, 2015
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0001] This invention was made with U.S. Government support under Cooperative Agreement No. DE-OE0000674 awarded by the US Department of Energy (DOE). The Government has certain rights in this invention.