《新能源科技》杂志社

New Energy Technology Magazine Agency

关键词: 风电机组, 大型柔塔, 振动分析, 快速傅里叶变换

Abstract: The wind turbine tower resonance problem seriously affects the structural stability and life of the turbine, which is the key to the design and operation of wind farms. This paper comprehensively analyzes the vibration behavior of large-scale flexible towers, and innovatively uses the Fast Fourier Transform (FFT) combined with advanced data analysis methods to explore in depth. In view of the challenges posed by the increase in the flexibility and height of modern tower, the study uses the FFT to convert the time domain signal into frequency domain components through the measured vibration data in the west and north directions, accurately identifies the key resonance frequency, and for the first time clarifies the coupling relationship between it and the rotational frequency of the wind turbine and the frequency of the blades passing through the wind turbine, to reveal the resonance-inducing mechanism. Based on this, a vibration control strategy with dynamic optimization of operating speed is proposed, which can effectively avoid the resonance frequency range and reduce the vibration response. The conclusions show that the probability of resonance is small under low wind conditions and large when the wind speed increases suddenly. The risk of resonance is low at the rated speed, but long-term operation at10.3 rpm should be avoided. This study provides innovative suggestions to improve the operation strategy, safety and durability of the tower, and provides an important basis for the operation and management of wind farms.

Key words: wind turbine, large-scale flexible towers, vibration analysis, Fast Fourier Transform