Analysis and methodology for measuring the IEC61850 GOOSE messages latency: Gaining interoperability testing

IEC61850 standard provides new kind of solution and offers efficient performance within a substation automation system (SAS). This efficiency has been introduced by means of exchanging real-time information, reducing life-cycle costs and interoperability. Measuring the transferring messaging latency and interoperability testing within the Substation Automation System (SAS) are crucial tasks that require special efforts based on several modern hardware and software tools have to be used. Since, these tasks are an important issue that must be realized by Power Utilities within the design and implementation of the SAS process. Therefore, this paper provides the analysis and the methodology for measuring the transferring messaging latency of the Generic Object Oriented Substation Event (GOOSE) within the SAS. Successful measurements for the transferring GOOSE messages latency within different case study scenarios have been achieved in which that illustrate the Device under test (DUT)s are compliant with the IEC 61850 criteria. Moreover it proves the interoperability concept that the DUTs subscribe to the GOOSE messages from the third party Intelligent Electronic Devices (IED). Tasks have been implemented using a round trip time measuring method.