IEC 61850

The standard IEC 61850 of the International Electrotechnical Commission (IEC) describes a general communication protocol for the protection and control systems in electrical switchgear of medium and high -voltage technology ( Substation Automation ). The standard series defined above all:

  • General requirements for switchgear,
  • The most important information for functions and devices,
  • Information exchange for protection, monitoring, control and measurement,
  • A digital interface for the primary data, and
  • A configuration language

General

The protocol uses TCP / IP as the basic transmission protocol and the Manufacturing Messaging Specification (MMS ) defined in the IEC 61850-8-1 standard part as a classical client - server communication. In addition, two so-called peer-to- peer services for real-time communication are described that are based directly on the Ethernet protocol:

  • Faster transfer samples in accordance with standard IEC 61850-9-1 part
  • Transmission of GOOSE messages according to IEC 61850-8-1 standard part

In contrast to IEC 60870-5-104, which is based on a signal-oriented data model, the data model of the interface IEC 61850 is strictly object oriented. The name of the object in plaintext serves as identification. The objects are self-describing, ie the structure of the objects is transferred to the object itself in the telegram.

Within the standard all the needs of substation automation are met. This affects the communication structures as well as the strictly object-oriented data model. The standard is designed but so general that it can play a role for many other applications in automation and. It will maintain the basic principles and supplemented by industry-specific data models:

  • IEC 61400-25 - Communications for monitoring and control of wind power plants
  • IEC 61850-7-410 (formerly IEC 62344 ) - hydroelectric power plants - Communication for monitoring and control
  • IEC 61850-7-420 (formerly IEC 62350 ) - Communication system for decentralized power - defined object models to specific information that can be exchanged between distributed energy resources and appropriate monitoring and control systems. These extended IEC 61850-7-420 standard IEC 61850 for the most part while maintaining compatibility to the standards IEC 61970 (CIM ), IEC 60870-5 and IEC 60870-6.

In contrast to IEC 60870-5-104 IEC 61850, although only defined for the ward. From a technical point of view but the IEC 61850 is also suitable for the process data transmission between the stations and the network control systems. Thus an integrated system architecture of the process, via the station control system to the network control center without costly gateways would be possible.

Parts of the IEC 61850 standard

  • Part 1 - Introduction and Overview of the standards of IEC 61850
  • Part 2 - dictionary, collection of terms
  • Part 3 - General requirements, quality requirements, environmental conditions, ancillary services and other standards and other technical regulations
  • Part 4 - System and project management, requirement engineering services, system usage cycle and quality assurance
  • Part 5 - Communication requirements for functions and device models, the principle of logical nodes, logical communication links, the concept associated information elements for the communication ( PICOM ), functions, performance requirements, and "dynamic " scenarios
  • Part 6 - configuration language, formal description of the single-pole scheme of device and system structure and its assignment to the pole scheme
  • Part 7 - Basic communication structure and object model, communication principles, description of abstract communication service interface and their specification model, the server database, abstract common data classes, definition of logical nodes
  • Part 8 - Specific communication service mapping, mapping to MMS, illustration for communication within the entire station, client -server communication and GOOSE telegrams
  • Part 9 - Specific communication service mapping, illustration for the point - to-point type, one-way, and for the bus-like, flexible communication of samples of the converter
  • Part 10 - conformance testing, specifies the technique for testing the conformity of client, server, measurement analysis and design tools. As well as the used measurement techniques to the performance parameters.

In Germany, the IEC 61850 is published as DIN standard DIN EN 61850.

Power-system protection Manufacturing Message Specification
241355
de