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Secured Control of Circuit Breakers in a Digital Substation

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
Methods and systems for secured control of circuit breakers in an electric power substation against undesired direct operation. Consequences of a malicious action are prevented or mitigated using a validation approach that either blocks the command or ensures a negligible effect on system operation. An example method, suitable for implementation in a monitoring device in an electric power substation, includes receiving a command to open or close a circuit breaker. In response, one or more state parameters for the electric power network that comprises the substation are then predicted, the predicted state parameters reflecting an operating state for the network under the assumption that the received command is executed. The method further comprises comparing the predicted one or more state parameters to corresponding operational limits. Execution of the command is then blocked, in response to determining that one or more of the predicted state parameters violate the corresponding operational limits.
Kondabathini, Anil (Apex, NC), Nuqui, Reynaldo (Cary, NC), Wang, Zhenyuan (Morrisville, NC), Ishchenko, Dmitry (Cary, NC)
14/ 700,918
April 30, 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.