IEC Smart Grid Standardization Roadmap

The parts IEC 60870-5-101 and 104 are predominantly used for the information exchangefrom substations to control centres but also within substations. The application fields rangefrom primary substations (high and medium voltage level) down to secondary substations(medium to low voltage level). Because of their generic design and their pure signal orientedcommunication focus they can also be applied in non-electric domains. Consequently theiruse for communication with gas transmission and distribution substations and in water supplyfacilities is popular.IEC 60870-5-104 addresses the requirement to overcome the performance limitations of serialend-to-end communication by introducing Ethernet and TCP/IP for IEC 60870-5. This allowshigher transmission rates and the use of bus systems.IEC 60870-5-103 focuses on electric protection relays. In comparison to IEC 60870-5-101 and104 the generic data objects are clearly defined as application specific objects to representinformation of protection functions. This standard is predominantly used for communication ofprotection relays within substations.Due to the widespread application of IEC 60870-5, changing the current power systems tosmart grids naturally poses the requirement to adopt this existing telecontrol infrastructure inorder to shape smart grid functionality.The following paragraphs show which IEC standards cover the intersystem and subsystemcommunication of the basic systems. In addition it is indicated which interoperability level isprovided by the individual standards.System: Bulk GenerationBulk GenerationSubsystem CommunicationSubstation IEC 61850, Communication networks and systems in substations 1), 2),3)AutomationIEC 60870-5-101, Telecontrol equipment and systems – Part 5-101: 1), 2)Transmission protocols – Companion standard for basic telecontroltasksIEC 60870-5-103, Telecontrol equipment and systems – Part 5-103: 1), 2),3)Transmission protocols – Companion standard for the informativeinterface of protection equipmentIEC 60870-5-104, Telecontrol equipment and systems – Part 5-104: 1), 2)Transmission protocols – Network access for IEC 60870-5-101using standard transport profilesIEC 60255-24, Electrical relays - Part 24: Common format for2), 3)transient data exchange (COMTRADE) for power systemsIEC 61400-25, Wind turbines - Part 25: Communications for1), 2),3)ProcessAutomationmonitoring and control of wind power plantsIEC 61158, Industrial communication networks – Fieldbusspecifications, IEC 61784-1, Industrial communication networks –ProfilesIntersystem CommunicationOperation IEC 61850, Communication networks and systems in substations 1), 2),3)IEC 60870-5-101, Telecontrol equipment and systems – Part 5-101: 1), 2)Transmission protocols – Companion standard for basic telecontroltasksMarketsIEC 60870-5-104, Telecontrol equipment and systems – Part 5-104:Transmission protocols – Network access for IEC 60870-5-101using standard transport profiles1), 2)1), 2)See Clause Markets1) Network Interoperability, 2) Syntactic Interoperability, 3) Semantic InteroperabilityEd. 1.0 - 2009-12 28 /136