电机与控制应用2024，Vol.51Issue(3)：30-37,8.DOI:10.12177/emca.2023.194
考虑不平衡磁拉力的双馈异步风力发电机轴承外圈故障动力学建模
Dynamic Modeling of Doubly-Fed Wind Turbine Bearing Outer Ring Fault Considering Unbalanced Magnetic Pull
摘要
Abstract
Bearing faults can cause changes in the air gap of doubly-fed wind turbines,generating unbalanced magnetic pull(UMP).In order to accurately reveal the bearing fault vibration characteristics of doubly-fed wind turbines,a study on dynamic modeling of the outer ring fault of the bearing considering the UMP is carried out.Firstly,a bearing outer ring fault model is constructed based on the Hertz contact theory.Then,the air gap magnetic flux density of the generator rotor under normal and bearing fault conditions is derived,and the UMP acting on the generator rotor is obtained.Finally,the Runge-Kutta method is used to solve the model and the vibration response of the bearing fault is obtained.Experimental comparison analysis shows that the proposed dynamic model can effectively reveal the double impact phenomenon of the vibration signal of doubly-fed wind turbines with bearing faults,and the UMP excitation can affect the modulation characteristics of the vibration signal of wind turbine bearings outer ring faults.A new theoretical references is provided for fault diagnosis of wind turbine bearings.关键词
不平衡磁拉力/动力学建模/风力发电机/轴承/故障诊断Key words
unbalanced magnetic pull/dynamic modeling/wind turbine/bearing/fault diagnosis分类
信息技术与安全科学引用本文复制引用
庞彬,郑涵升,周紫烨,王博巍,郝紫阳..考虑不平衡磁拉力的双馈异步风力发电机轴承外圈故障动力学建模[J].电机与控制应用,2024,51(3):30-37,8.基金项目
河北省自然科学基金资助项目(E2021201032)Natural Science Foundation of Hebei Province,China(E2021201032) （E2021201032）
