This part of IEC 61400 defines an information model from which time-based, and production-based availability indicators for services can be derived and reported.

The purpose is to provide standardised metrics that can be used to create and organise methods for availability calculation and reporting according to the user's needs.

The document provides information categories, which unambiguously describe how data is used to characterise and categorise the operation. The information model specifies category priority for discrimination between possible concurrent categories. Further, the model defines entry and exit criteria to allocate fractions of time and production values to the proper information category. A full overview of all information categories, exit and entry criteria is given in Annex A, see Figure A.1.

The document can be applied to any number of WTGSs, whether represented by an individual turbine, a fleet of wind turbines, a wind power station or a portfolio of wind power stations. A wind power station is typically made up of all WTGSs, functional services and balance of plant elements as seen from the point of common coupling.

Cross References:
IEC 61400-1
EN IEC 61400-1
IEC 60050-415
IEC 61400-12
IEEE 762-2006
IEC 61400-25-3:2015
EN 61400-25-2:2007
ISO 3977-9:1999
IEC 61400-25-6:2016
IEC 61400-25-5:2017
IEC 61400-12-1:2017
EN 61400-25-3:2007
IEC 61400-25-2:2015
IEC 61400-12-2:2013
IEC 61400-25-1:2017
EN 61400-25-4:2008
IEC 61400-25-4:2016


All current amendments available at time of purchase are included with the purchase of this document.