IEC 61400-12-6:20 22规定了用于测量单个发电水平轴风力涡轮机的机舱传递函数的程序，根据IEC 61400-2，该风力涡轮机不被认为是小型风力涡轮机。当需要有效的机舱传递函数来执行根据IEC 61400-12-2的功率性能测量时，预期使用本文件。本文件规定了如何表征风力涡轮机的机舱传递函数。机舱传递函数是通过收集机舱的同时测量值来确定的？在一段时间内测量的风速和自由流风速（如在气象桅杆上测量的），其长度足以在一系列风速和不同的风和大气条件下建立一个具有统计意义的数据库。该程序还提供了测量不确定度的确定指南，包括不确定度源的评估和组合它们的建议。 IEC 61400-12-6的第一版是结构修订的一部分，取消并取代了性能标准IEC 61400-12-1:20 17和IEC 61400-12-2:20 13。结构修订版不包含与IEC 61400-12-1:20 17和IEC 61400？12？2:20 13，但与风测量、场地校准测量以及障碍物和地形评估相关的部分已被提取到单独的标准中。

IEC 61400-12-6:2022 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. This document specifies how to characterise a wind turbine's nacelle transfer function. The nacelle transfer function is determined by collecting simultaneous measurements of nacelle？measured wind speed and free stream wind speed (as measured on a meteorological mast) for a period that is long enough to establish a statistically significant database over a range of wind speeds and under varying wind and atmospheric conditions. The procedure also provides guidance on determination of measurement uncertainty including assessment of uncertainty sources and recommendations for combining them.
This first edition of IEC 61400-12-6 is part of a structural revision that cancels and replaces the performance standards IEC 61400-12-1:2017 and IEC 61400-12-2:2013. The structural revision contains no technical changes with respect to IEC 61400-12-1:2017 and IEC 61400？12？2:2013, but the parts that relate to wind measurements, measurement of site calibration and assessment of obstacle and terrain have been extracted into separate standards.