Network failure recovery system and method for network failure recovery

Abstract

This concerns systems and methods for network failure recovery in digital substations. One method includes receiving, via an intelligent electronic device (IED) from a process interface unit (PIU), in parallel a pre-configured data stream through a point-to-point connection and one or more other data streams through an Ethernet network. The method further includes determining that at least one of the following failure conditions is met: a frame in the pre-configured data stream is lost or delayed, the data quality in the frame in the data stream is below a first threshold, the time period associated with the data in the frame in the data stream is below a second threshold, or a health indicator associated with the PUI is below a third threshold. The method further allows identifying at least one redundant frame in one or more other data streams.If the data quality in the redundant frame is satisfactory, the method proceeds to use the redundant frame for further processing.

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