漂浮式风电机组失控状态下叶片气弹失稳特性分析  

Analysis of Blade Aeroelastic Instability Characteristics of Floating Wind Turbines under Run-away Situation

作　　者：田德 周强 李贝 周臣凯 黄明月 邓英 TIAN De;ZHOU Qiang;LI Bei;ZHOU Chenkai;HUANG Mingyue;DENG Ying(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Beijing 102206,China)

机构地区：[1]新能源电力系统全国重点实验室(华北电力大学),北京102206

出　　处：《华北电力大学学报（自然科学版）》2024年第6期122-129,共8页Journal of North China Electric Power University：Natural Science Edition

基　　金：华能集团总部科技项目(HNKJ20-H88).

摘　　要：漂浮式海上风电机组在风载荷、波浪载荷作用下,叶片气弹耦合特性复杂,因此其面临气弹失稳的风险更高。以DTU 10 MW参考风电机组为研究对象,基于修正的叶素动量理论、几何精确梁模型和三维势流理论,建立漂浮式海上风电机组气动-水动-控制-弹性分析模型。综合时域仿真和频域分析,研究漂浮式风电机组叶片失控状态下的气弹失稳特性。结果表明:叶片发生由摆振和扭转耦合引起的气弹不稳定;漂浮式海上风电机组浮式平台的纵摇运动和垂荡运动是导致叶片气弹失稳临界转速降低的主要原因,纵摇运动下叶片气弹失稳临界转速降低7.90%、垂荡运动下降低3.56%;海浪有义波高和谱峰周期增大会降低叶片气弹失稳临界转速。Under the action of wind load and wave load,the aeroelastic coupling characteristics of floating offshore wind turbines blades are complex,so it faces a higher risk of aeroelastic instability.Taking the DTU 10 MW reference wind turbine as the research object,we established the aero-hydro-servo-elastic simulation model of the floating offshore wind turbine based on the modified blade element momentum theory,geometrically exact beam model and three-dimensional potential flow theory.What’s more,we carried out time-domain simulation and frequency-domain analysis to study the aeroelastic instability characteristics of floating wind turbine blades in the run-away situation.The results show that the blade has aeroelastic instability caused by the coupling of edgewise and torsion.The pitch and heave motions of the floating platform of the floating offshore wind turbines are the main reasons for the lower critical rotational speed of the aeroelastic instability of the blades.The critical rotational speed of the aeroelastic instability of the blade is reduced by 7.90%under the pitch motion and 3.56%under the heave motion.The increase of significant wave height and spectral peak period of waves can reduce the critical rotational speed of blade aeroelastic instability.

关 键 词：漂浮式海上风电机组 叶片 气弹稳定性 失控状态 时域分析 频域分析 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]