On Evaluating R-GOOSE Messaging Latency over 5G: A Swedish Case Study

IEC61850 is a core enabling standard for the digitalization of the substation with standardized communication protocols for transmitting data within the substation. GOOSE message is a peer-to-peer messaging service for time-critical event messaging. GOOSE messages were extended in IEC61850-90-5 to routable GOOSE, allowing messages to be transmitted outside the substations in a Wide Area Network (WAN) such as 5G, which offers higher security, higher reliability and lower delays than previous mobile standards and opens an environment for wider outreach of substations in Distributed Protection & Control Schemes (DPACS) applications. In the paper, we evaluate the latency of sending IEC61850 R-GOOSE event messages over the public and private 5G networks in Sweden. Preliminary results indicate that the Local Break Out (LBO) latency is acceptable for DAPCS applications such as Fault Location, Isolation and Service Restoration (FLISR), selectivity and Phasor Measurement Units (PMU) transmission.