User:RichNichol/IEC 61400-26 Availability of wind turbines and wind turbine plants

IEC 61400-26 Availability of wind turbines and wind turbine plants 

IEC 61400-26-1: Time-based availability for wind turbines This technical specification has been approved and released for publication. The scope of this technical specification is to define generic information categories to which fractions of time can be assigned for a wind turbine generating system (WTGS) considering internal and external conditions based on fraction of time and specifying the following: * examples of optional information categories * examples of algorithms for reporting availability and performance indicators * examples of application scenarios
 * Generic information categories of a WTGS considering availability and other performance indicators
 * Information category priority (12 highest, 1 lowest) in order to discriminate between concurrent  categories
 * Entry and exit point for each information category in order to allocate designation of time
 * Informative annexes including:

Part 26-2: Production-based availability for WTGS

This technical specification has been drafted and awaits approval from the IEC and should be available in 2014. IEC 61400-26-2 is an extension of Part 1 that deals with use of production elements based on the information model defined in Part 1.

The scope of Part 2 provides a framework from which production indicators of a WTGS can be derived.

The document describes how data is categorized and provides examples of how the data can be used to derive performance indicators.

The approach of this part of the specification is to expand the time allocation model, with two additional layers for recording of the actual production and potential production associated with the concurrent time allocation.

The document also includes informative annexes with examples determining lost production, algorithms for production based indicators, other performance indicators, and application scenarios.

It is not the intention of this specification to define how production based availability shall be calculated or to form the basis for power curve performance measurements.

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