陆上风机结构整体振动特性现场监测与分析

MONITORING TEST ANALYSIS AND CHARACTERISTIC RESEARCH OF STRUCTURAL VIBRATION OF ONSHORE WIND TURBINE

文中以某陆上风机结构为研究对象进行现场监测,基于SCADA数据分析了风机的运行状态,并总结归纳风机在不同工况状态下各参数指标的变化规律。依据布置在风机塔筒上的加速度传感器所采集的振动数据进行模态参数识别和振动特性分析。结果表明风机结构的数值模型能够准确地计算得到风机整体振动的各阶频率,可用于塔筒的共振校验分析。并且风机正常运行时的自振频率可以避开1P和3P的过桨频率,满足DNVGL规范规定的预留10%安全度的要求。

Taking one onshore wind turbine as the research object for long-term monitoring, statistical analyses were performed on the operational state of wind turbine based on SCADA data, and variation rules of operating state parameters under different operating conditions are summarized. According to the vibration data collected by the acceleration sensor arranged on the wind turbine tower, modal parameters identification and vibration characteristic analysis are performed. The results show that the numerical model of the wind turbine structure can accurately calculate the fundamental frequencies of the wind turbine vibration, which can be used for the resonance verification analysis of the tower. And the fundamental frequencies of the wind turbine in the rated rotation speed can avoid the blade-passing frequency 1 P and 3 P, and meet the requirement of 10% safety allowance set by DNVGL.