BS EN IEC 61400-12-6:2022
Wind energy generation systems - Measurement based nacelle transfer function of electricity producing wind turbines

Standard No.

BS EN IEC 61400-12-6:2022

Release Date

2022

Published By

British Standards Institution (BSI)

Latest

BS EN IEC 61400-12-6:2022

Scope

1   Scope This part of IEC 61400‑12 specifies a procedure for measuring the nacelle transfer function of a single electricity-producing, horizontal axis wind turbine, which is not considered to be a small wind turbine in accordance with IEC 61400‑2. It is expected that this document be used when a valid nacelle transfer function is needed to execute a power performance measurement according to IEC 61400‑12‑2. A wind speed measured on the nacelle or hub of a wind turbine is affected by the turbine rotor (i.e. speeded up or slowed down wind speed). In IEC 61400‑12‑1, an anemometer is located on a meteorological tower that is located between two and four rotor diameters upwind of the test turbine. This location allows direct measurement of the "free" wind with minimum interference from the test turbine's rotor. In the procedure of this document, the anemometer is located on or near the test turbine's nacelle . In this location, the anemometer is measuring a wind speed that is strongly affected by the test turbine's rotor and the nacelle . The procedure in this document includes methods for determining and applying appropriate corrections for this interference. However, note that these corrections inherently increase the measurement uncertainty compared to a properly configured test conducted in accordance with IEC 61400‑12‑1. This document specifies how to characterise a wind turbine's nacelle transfer function. The nacelle transfer function is determined by collecting simultaneous measurements of nace...

BS EN IEC 61400-12-6:2022 Referenced Document

• IEC 60688 Electrical measuring transducers for converting AC and DC electrical quantities to analogue or digital signals
• IEC 61400-12-1 Wind energy generation systems - Part 12-1: Power performance measurement of electricity producing wind turbines
• IEC 61400-12-2:2022 Wind energy generation systems - Part 12-2: Power performance of electricity producing wind turbines based on nacelle anemometry
• IEC 61400-12-3 Wind energy generation systems - Part 12-3: Power performance - Measurement based site calibration
• IEC 61400-12-5:2022 Wind energy generation systems - Part 12-5: Power performance - Assessment of obstacles and terrain
• IEC 61400-50-1 Wind energy generation systems - Part 50-1: Wind measurement - Application of meteorological mast, nacelle and spinner mounted instruments*， 2022-11-16 Update
• ISO/IEC GUIDE 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)

BS EN IEC 61400-12-6:2022 history

• 2022 BS EN IEC 61400-12-6:2022 Wind energy generation systems - Measurement based nacelle transfer function of electricity producing wind turbines