Wind generating set monitoring method, device and system

The invention provides a a wind generating set monitoring method, device and system. The method comprises the steps of acquiring pitch angle data of blades of a wind generating set; calculating the rotary vibration frequency of blade roots based on the pitch angle data; and comparing the calculated rotary vibration frequency with inherent rotary vibration frequency of the blade roots, and obtaining the health state of the blades and a variable-pitch system according to working condition data of the wind generating set. 提供了一种风力发电机组的监测方法、装置和系统，所述方法包括：获取风力发电机组的叶片的桨距角数据；基于桨距角数据计算叶根的旋转振动频率；比较计算的旋转振动频率与叶根固有旋转振动频率，并根据风力发电机组工况数据获得叶片和变桨系统的健康状态。