IEC 61850 FEATURES

IEC 61850 features include:

1. Data Modeling -- Complete functionality of the substation is modelled into different standard logical nodes which can be grouped under different logical devices. There are logical nodes for data/functions related to the logical device (LLN0) and physical device (LPHD).
2. Reporting Schemes -- There are various reporting schemes (BRCB & URCB) for reporting data from server through a server-client relationship which can be triggered based on pre-defined trigger conditions.
3. Fast Transfer of events -- Generic Substation Event (GSE) are defined for fast transfer of event data for a peer-to-peer communication mode. This is again subdivided into GOOSE & GSSE
4. Setting Groups -- The setting group control Blocks (SGCB) are defined to handle the setting groups so that user can switch to any active group according to the requirement.
5. Sampled Data Transfer -- Schemes are also defined to handle transfer of sampled values using Sampled Value Control blocks (SVCB)
6. Commands -- Various command types are also supported by IEC 61850 which include direct & SBO commands with normal and enhanced securities.
7. Data Storage-- SCL(Substation Configuration Language) is defined for complete storage of configured data of the substation in a specific format.

STANDARD DOCUMENTS

IEC 61850 consists of the following parts detailed in separate IEC 61850 standard documents

• IEC61850-1: Introduction and overview
• IEC61850-2: Glossary
• IEC61850-3: General requirements
• IEC61850-4: System and project management
• IEC61850-5: Communication requirements for functions and device models
• IEC61850-6: Configuration description language for communication in electrical substations related to IEDs
• IEC61850-7: Basic communication structure for substation and feeder equipment

• IEC61850-7-1: Principles and models
• IEC61850-7-2: Abstract communication service interface (ACSI)
• IEC61850-7-3: Common data classes
• IEC61850-7-4: Compatible logical node classes and data classes
• IEC61850-8: Specific communication service mapping (SCSM)
  • IEC61850-8-1: Mappings to MMS (ISO/IEC9506-1 and ISO/IEC 9506-2)
• IEC61850-9: Specific communication service mapping (SCSM)
  • IEC61850-9-1: Sampled values over serial unidirectional multidrop point to point link
  • IEC61850-9-2: Sampled values over ISO/IEC 8802-3
• IEC61850-10: Conformance testing

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IEC 61850

IEC 61850 is an important international standard for substation automation that will have a very significant impact on how electric power systems are designed and built for many years to come. IEC61850 is a part of the International Electrotechnical Commission’s (IEC) Technical Committee 57 (TC57) architecture for electric power systems. The model-driven approach of the TC57 standards, including IEC61850, is an innovative approach that requires a new way of thinking about substation automation that will result in very significant improvements in both cost and performance of electric power systems.

The abstract data models defined in IEC61850 can be mapped to a number of protocols. Current mappings in the standard are to MMS (Manufacturing Messaging Specification), GOOSE, SMV, and soon to Web Services. These protocols can run over TCP/IP networks and/or substation LANs using high speed switched Ethernet to obtain the necessary response times of < style="text-decoration: none;">ACSI-CORBA mapping.