Iec 61850 Data Modelling - ABB COM600 Station Automation Series User Manual

1MRS756125
2.3.5.
COM600 Station Automation Series
User's Guide
Figure 2.3.4-1 Conceptual view of OPC client

IEC 61850 data modelling

To simplify protocol conversion and signal mapping in the gateway, each component
uses a common data model. The data model is based on common data classes and services
specified in the IEC 61850 standard. Each client and server component is a separate
program. The components interact with each other only via OPC interfaces. This means
that they can be developed and used independently as a part of the gateway as long as
they conform with the OPC DA and common data model specifications.
Protection and control products are connected to the gateway via OPC interfaces. Although
OPC provides means to access data on devices, it does not specify the semantics of the
data. This means that the same information is available in different formats depending
on which device and communication protocol is used. In addition, services, such as
breaker operation, vary among devices and protocols.
These differences complicate the reuse of gateway applications. To overcome this
problem, all the applicable data and services are remodeled in OPC servers according
to the data and service model specified in the IEC 61850 standard. This provides a pro-
tocol and device independent interface between the applications and the process. Fig-
ure 2.3.5-1 presents an overview of the IEC 61850 model usage.
COM600 3.2
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