US 11,657,148 B2
Event analysis in an electric power system
Philip Joseph Hart, Rexford, NY (US); and Honggang Wang, Clifton Park, NY (US)
Assigned to GENERAL ELECTRIC COMPANY, Schenectady, NY (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on May 10, 2019, as Appl. No. 16/409,189.
Prior Publication US 2020/0356668 A1, Nov. 12, 2020
Int. Cl. G06F 21/55 (2013.01); G05B 23/02 (2006.01); G01D 3/032 (2006.01)
CPC G06F 21/554 (2013.01) [G01D 3/032 (2013.01); G05B 23/0275 (2013.01); H02J 2203/20 (2020.01)] 15 Claims
OG exemplary drawing
1. A method comprising:
receiving, via a communication interface of an event detection and classification module comprising a processor, data from one or more sensors in a system, wherein:
the event detection and classification module includes a detection module and a classification module, and
the system is a power network and the one or more sensors are associated with a plurality of nodes in the power network;
determining an event occurred based on the received data;
applying a coherency similarity process to the received data via the classification module, wherein the coherency similarity process determines whether the received data is similar, within one of a threshold value and a range of values, to expected data for the event;
determining whether the event is an actual event or a mal-doer event based on an output of the classification module, further comprising
calculating an event singular value decomposition for the received data based on the application of the coherency process;
identifying a post-event right singular value based on the calculated post-event singular value decomposition;
comparing the post-event right singular value to a reference value for the same at least one pair of nodes to output a classification threshold value; and
determining whether the classification threshold value is one of inside or outside a predetermined value or range of values;
transmitting the determination of the event as the actual or the mal-doer event; and
modifying operation of the system based on the transmitted output.