A Partition Fitting Method for Wind Turbine Nacelle Transfer Function

Abstract

The invention discloses a wind generator set engine room transfer function subregional fitting method. The method comprises the steps of 1, determining a target set, and collecting running data of a wind measurement mast and the target set within the same time; 2, determining the hub height H of the target set and calculating average wind speed data of the wind measurement mast at the height H; 3, utilizing IEC standards and the average wind speed data calculated in the step 2 as the basis, and removing abnormal running data in the step 1; 4, calculating a transfer function of an engine room of the target set, and correcting the transfer function, wherein the step 4 comprises the substep 4-1 of conducting fitting on a low wind speed area and a high speed wind speed area which are obtained by using the rated wind speed value as the limit and the substep 4-2 of calculating a fitting function order of the low wind speed area and a fitting function order of the high wind speed area respectively. By correcting the wind speed of the engine room, the wind speed of free flow at the center of a wind generator set wind wheel is obtained, and a power curve of the performance of the set can be more objectively reflected.

Description

technical field [0001] The invention relates to the technical field of performance evaluation and power characteristic testing of a wind power generating set, in particular to a partition fitting method for a transfer function of a wind power generating set nacelle. Background technique [0002] The actual power curve of the unit is an important tool and means for performance evaluation and optimization of wind turbines. By analyzing the actual power curve of the unit and comparing it with the theoretical curve, the difference between the actual power and the ideal power of the unit at each wind speed range can be obtained, thereby guiding the performance evaluation and optimization of the unit. At present, the wind speed used when drawing the power curve of the unit is mainly the actual wind speed measured by the anemometer of the unit. Since the anemometer is installed on or near the nacelle of the wind turbine unit under test, the wind speed measured by the anemometer at ...

AI Technical Summary

Problems solved by technology

And under the premise of ensuring high accuracy, the transfer function (NTF) determined by the IEC61400-12-2:2013 standard method is solved due to too many wind speed zones, which leads to relatively complicated calculations and poor practicability.

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