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IEC 61850 - The basic approach

...is the separation of the slowly growing substation-specific applications (APP*) from the fast advancing communication (COM**). This separation is provided by the Abstract Communication Services Interface (ACSI). The standard can thus be easily adapted to future developments in the communication technology, whilst leaving existing databases and functions untouched. Therefore, IEC 61850 is future-proof and safeguards your investments.

The object-oriented data model of IEC 61850 defines all objects in the substation that communicate with each other. These so-called Logical Nodes contain the data and attributes of the respective objects. The data model uses terminology familiar to any power system engineer. In addition, this part contains a device model, which describes the function allocation as well as the properties of each physical device. Clear rules facilitate extensions in applications.

The communication procedures are described by the seven-layer ISO/OSI model, called stack. The selected stack is MMS*** over TCP/IP and Ethernet as used in mainstream communication technology. It is the use of mainstream means that allows benefiting from the fast advancing communication technology. The performance and safety requirements dedicated to substation automation are considered.

The data model and the communication stack are linked by means of a standardized mapping, which is the only item to be adapted in case changes in communication technology are implemented. This has no impact on the functions and databases in the system.

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Future-proof

Extension in applications

Benefit form the fast advancing communication technology

Leaving existing databases and functions untouched