What is IEC 61850-7-2 ?

IEC 61850-7-2 and IEC 61850-7-3 are two widely recognized standards for communication and integration of electronic devices used in electrical substations. These standards provide a framework for the exchange of information between devices, enabling the monitoring, control, and protection of the electrical grid efficiently.

IEC 61850-7-2 is a technical specification for the communication protocol suite defined by IEC 61850. It specifies the data models, configuration language, and communication services required for the exchange of information between ESDIs (Electronic Substation Diagrams) and SCADA (Supervisory Control and Data Acquisition) systems. The primary objective of IEC 61850-7-2 is to ensure interoperability between different devices and systems, enabling the exchange of data in a standardized format.

IEC 61850-7-3 is a corollary standard to IEC 61850-7-2, which provides a more detailed description of the data models, configuration language, and communication services defined by IEC 61850. The primary goal of IEC 61850-7-3 is to provide a more comprehensive description of the information models and services defined by IEC 61850, including the definition of data objects and their relationships.

Understanding the Information Models

IEC 61850-7-2 and IEC 61850-7-3 both define a data model for the exchange of information between devices. The data model is based on the concept of a communication network, where devices communicate with each other using a common data model. The data model is composed of several data objects, including:

* Node definitions: These objects define the basic information about a device, such as its name, address, and function.

* Transfer functions: These objects define the relationships between devices, including the data transfer from one device to another.

* Data objects: These objects represent the data that is being exchanged between devices, including both structured and unstructured data.

* Data entities: These objects represent the individual components of data objects, such as values or attributes.

The configuration language of IEC 61850-7-2 and IEC 61850-7-3 is based on the Java-based Configuration Language (CLI) and the Data Object Configuration (DOC) syntax, respectively. The CLI provides a hierarchical structure for defining the data model, while the DOC syntax allows for more detailed description of the data objects and their relationships.

The Communication Services of IEC 61850-7-2 and IEC 61850-7-3

IEC 61850-7-2 and IEC 61850-7-3 define several communication services for the exchange of information between devices. These services include:

* Get request: This service is used to retrieve information from a device.

* Create request: This service is used to create a new device or modify an existing one.

* Update request: This service is used to update information in a device.

* Delete request: This service is used to remove a device from a system.

* Get next event: This service is used to retrieve the next event in a device's data stream.

* Set request: This service is used to modify the configuration of a device.

Conclusion

IEC 61850-7-2 and IEC 61850-7-3 are two important standards for the communication and integration of electronic devices used in electrical substations. These standards provide a framework for the exchange of information between devices, enabling the monitoring, control, and protection of the electrical grid efficiently. By defining a.