IEC 61850 Process Bus Communication decrypted

February 1, 2017

With the increasing usage of non-conventional instrument transformers applying IEC 61850-9-2 sampled values and GOOSE messaging being used also for process level communication, more critical information is transmitted on the communication network. Thus the proper functioning of the process bus communication infrastructure becomes mission-critical. This paper describes how the configuration for the IEC 61850 process bus communication can be verified against the Substation Configuration Description (SCD) during commissioning and how the process bus communication can be supervised permanently. It is shown how sampled values and GOOSE communication can be permanently inspected for e.g., lost samples, GOOSE timing problems and PTP time synchronization issues. It also shows example setups on how network supervision can be applied in redundant network structures using RSTP, HSR, or PRP redundancy protocols.

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