Patent ID: 10574480

Abstract:
A method includes transmitting time-critical messages in an OSI layer 2 network tunnel from a first IED in a first substation to a second IED in a second substation over a WAN, wherein each of the first and second substation comprises an edge IED and is associated with a substation LAN, wherein each of the time-critical messages comprises message parameters. The method includes: creating a translation table comprising corresponding values of the message parameters, between the LANs and the WAN; defining a virtual IED in the second substation using the translated values of the message parameters, to impersonate the first IED; translating the message parameters according to the translation table, by the edge IED of the first and second substation; forwarding the time-critical messages from the first IED in the first substation to the WAN; and receiving the time-critical messages by the second IED in the second substation from the WAN.