IEC 61850

 

• IEC 61850 is the most recent standard for communication networks and systems in substations. Its scope of definitions greatly exceeds that of the preceding standard IEC 60870-5-101. IEC 61850 comprises these individual standards:

  • IEC 61850-1, 61850-2
    Introduction and overview / Glossary
  • IEC 61850-3
    General requirements
  • IEC 61850-4
    System and project management
  • IEC 61850-5
    Communication requirements for functions and device models
  • IEC 61850-6
    Configuration description language for communication in electrical substations related to IEDs
  • IEC 61850-7-1
    Basic communication structure for substation and feeder equipment - Principles and models
  • IEC 61850-7-2
    Basic communication structure for substation and feeder equipment - Abstract communication service interface (ACSI)
  • IEC 61850-7-3
    Basic communication structure for substation and feeder equipment - Common data classes
  • IEC 61850-7-4
    Basic communication structure for substation and feeder equipment - Compatible logical node classes and data classes
  • IEC 61850-8-1
    Specific Communication Service Mapping (SCSM) - Mapping to MMS (ISO 9506-1 and ISO 9506-2) and to ISO/IEC 8802-3
  • IEC 61850-9-1
    Specific Communication Service Mapping (SCSM) - Sampled values over serial unidirectional multidrop point-to-point link
  • IEC 61850-9-2
    Specific Communication Service Mapping (SCSM) - Sampled values over ISO/IEC 8802-3
  • IEC 61850-10
    Conformance testing

  IEC 61850 is not limited to the transmission format, but also defines a complete data model. It also introduces an XML-based language (Substation Configuration description Language -  SCL) offering a vendor-independent method of describing devices and their configurations.

  IEC 61850 is supplemented by branch-specific data models (e.g. IEC 61400-25), in which the basic protocol principles are maintained.
  The standard IEC 61400-25 (communications for monitoring and control of wind power plants) is also implemented in the protocol stack IEC 61850, Client.
  The mapping is complying with part 4 of the norm (IEC 61400-25 annex C: IEC 61400 per Manufacturing Message Specification (MMS) according to IEC 61850-8-1).

ISO/OSI Model

7	Application Layer	TimeSync SNTP	SV Sampled Values	GOOSE Generic Object Oriented Substation Event	GSSE Generic Substation Status Event MMS ISO 9506 Connectionless ACSE ISO/IEC 8649,10035	MMS ISO 9506 Core ACSI Services Connection-oriented ACSE ISO/IEC 8649,8650
6	Presentation Layer	n/a	n/a	ASN.1, BER ISO/IEC 8824.1	Connectionless presentation ISO/IEC 8649,10035 ASN.1, BER ISO/IEC 8824.1	Connection-oriented presentation protocol ISO/IEC 8822,8823 ASN.1, BER ISO/IEC 8824.1
5	Session Layer	n/a	n/a	n/a	Connectionless session ISO/IEC 9548	Connection-oriented session ISO/IEC 8326,8327
4	Transport Layer	UDP/IP	n/a	n/a	GSSE T-Profile ISO/IEC 8602	ISO CO T-Profile ISO/IEC 8073	TCP/IP T-Profile ISO Transport on top of TCP (RFC 1006)
3	Network Layer	IP (RFC 791)	n/a	n/a	ISO/IEC 9542	ISO/IEC 8473	IP (RFC 791)
2	Link Layer	RFC 894	Priority Tagging/VLAN (IEEE 802.1Q) CSMA/CD (ISO/IEC 8802.3)		ISO/IEC 8802-2 LLC		RFC 894
1	Physical Layer	ISO/IEC 8802.3 Ethertype			ISO/IEC 8802.3		ISO/IEC 8802.3 Ethertype