COMMUNICATION NETWORKS AND SYSTEMSFOR POWER UTILITY AUTOMATION –Part 5: Communication requirementsfor functions and device models1 ScopeThe specifications of this document refer to general, respectively core, communicationrequirements of the application functions in all domains of power utility automation systems.Dedicated communication requirements and most examples of application functions in thisdocument are from the domain substation automation but may be reused in or extended to otherdomains within power utility automation systems. Note that sometimes instead of the termsubstation automation domain the term substation domain is used, especially if both theswitchyard devices (primary system) and the automation system (secondary system) areregarded.The description of the application functions is not used to standardize these functions, but toidentify communication requirements between Intelligent Electronic Devices (IEDs) hostingthese functions within plants and substations in the power system, between such stations (e.g.between substation for line protection) and between the plant or substation and higher-levelremote operating places (e.g. network control centres) and maintenance places. In additioninterfaces to remote technical services (e.g. maintenance centres) are considered. The generalscope is the communication requirements for power utility automation systems. The basic goalis interoperability for all interactions providing a seamless communication system for the overallpower system management. Another prerequisite for interoperability is a commonly definedmethod for time synchronization.Standardizing application functions and their implementation is completely outside the scope ofthis document. Therefore, it cannot be assumed a single philosophy of allocating applicationfunctions to devices. To support the resulting request for free allocation of these functions, aproper breakdown of these functions into parts relevant for communication is defined. Theexchanged data and their required performance are defined.The same or similar IEDs from substations like protective and control devices are found in otherdomains like power plants also. Using this document for such devices in these plants facilitatesthe system integration e.g. between the power plant control and the related substationautomation system. For some of such other application domains like wind power plants, hydropower plants and distributed energy resources specific standard parts according to theIEC 61 850 series have been already defined and published.

IEC 61850-5-2022 PDF

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