Q-Technology - great experience on standards

Q-Technology has been involved in development of several international standards during the last 20 years. The work on developing standards has been focused on information communication - especially on high end data communication and communication with system users.

During the years Q-Technology has been involved in development of the following international standards:

IEC_61400-25-1 Communication for monitoring and control of wind power plants - Overall description of principles and models

IEC_61400-25-2 Communication for monitoring and control of wind power plants - Information Models

IEC_61400-25-3 Communication for monitoring and control of wind power plants - Information Exchange Models

IEC_61400-25-4 Communication for monitoring and control of wind power plants - Mapping to protocol profile

IEC_61400-25-5 Communication for monitoring and control of wind power plants - Conformance Testing

IEC_61400-25-6 Communication for monitoring and control of wind power plants - Logical Node class and data classes for condition monitoring. This project is in progress and is expected to be finalized in 2009.

IEC 61400-26 - Terms and definntions for availability calculations in wind power plants. This project is in progress and is expected to be finalized in 2009/2010.


 

Scope of the IEC61400-25 standard series

The focus of IEC 61400-25 is on the communications between wind power plant components such as wind turbines and actors such as SCADA Systems. Internal communication within wind power plant components is outside the scope of this standard.

IEC 61400-25 is designed for a communication environment supported by a client-server model.

Three areas are defined, that are modeled separately to ensure the scalability of implementations: (1) wind power plant information models, (2) information exchange model, and (3) mapping of these two models to a standard communication profile.

The wind power plant information model and the information exchange model, viewed together, constitute an interface between client and server. In this conjunction, the wind power plant information model serves as an interpretation frame for available wind power plant data.

The wind power plant information model is used by the server to offer the client a uniform, component-oriented view of the wind power plant data.

The information exchange model reflects the whole active functionality of the server.

IEC 61400-25 enables connectivity between a heterogeneous combination of client and servers from different manufacturers and suppliers.

The IEC 61400-25 defines mainly a server with the following aspects:

  • information provided by a real application of a wind power plant component, e. g., “wind turbine rotor speed" or “total power production of a certain time interval" is modeled and made available for access. The information modeled in the standard is defined in part IEC_61400-25-2
  • services to exchange values of the modeled information defined in part IEC_61400-25-3
  • mapping to a communication profile, providing a protocol stack to carry the ex-changed values from the modeled information as defined in part IEC_61400-25-4

IEC 61400-25 only defines how to model the information, information exchange and mapping to specific communication protocols. The standard excludes a definition of how and where to implement the communication interface. However, the objective of the standard is that the information associated with a single wind power plant component is accessible through a corresponding logical device.