摘要
针对风力发电机组偏航系统在复杂载荷下的冲击激励响应研究仍处于起步阶段,为了辅助解决偏航系统在复杂激励下故障频发这一问题,提出了一种基于多体动力学的风电机组偏航系统载荷响应分析方法。首先,以停机时刻出现摇摆现象的某兆瓦级风电机组偏航系统为研究对象,建立了偏航系统多体动力学仿真模型,对风电机组偏航驱动在启停机、偏航过程中的载荷响应进行了分析;然后,根据现场建压站建压曲线和偏航驱动器的摆动方向,分析了造成偏航驱动在停机时刻摆动的原因;接着,采用动力学仿真分析的方法研究了偏航系统停机策略对螺栓所受拉力的影响,并在风场设置对照组进行了验证;最后,在偏航系统生产企业搭建了测试平台,开展了偏航系统测试,根据偏航过程中的扭矩波动幅值和周期,验证了偏航驱动模型的有效性。研究结果表明:摇摆问题的主要原因是偏航停机时刻的驱动组件与主机架结合面承受了过大的倾覆力矩,造成结合面上的螺栓承受了245.21 kN的拉力,超过了本身屈服强度的拉伸应力220.5 kN;对偏航控制策略进行了优化,将偏航液压刹车释放延时由1.5 s改为0.1 s,螺栓所受拉力降至220.48 kN;开展了偏航系统多体动力学仿真研究,为分析和解决偏航系统现场故障提供了数据支持,可有效提高偏航系统故障的解决效率。
Aiming at the research on the impact excitation response of wind turbine yaw system under complex loads was still in its early stages,a multi body dynamics-based load response analysis method for wind turbine yaw system was proposed to assist in solving the problem of frequent faults in yaw system under complex excitations.Firstly,taking a megawatt wind turbine as the research object,a multi-body dynamics simulation model of the yaw system was established to analyze the load response of the wind turbine yaw drive during start-up,shutdown and yaw processes.Secondly,according to the building pressure curve of the site building pressure station and the swing direction of the yaw driver,the reasons causing the swing of the yaw drive at the time of shutdown were analyzed.Through dynamic simulation analysis,the effect of stopping strategy of yaw system on bolt tension was studied,and the control group was set up in the field project for verification.Finally,a test platform was built in the yaw system manufacturer,and the yaw system test was carried out.According to the amplitude and period of torque fluctuation during yaw,the effectiveness of yaw drive model was verified.The research results show that the main reason for the yaw drive swing problem is that the coupling surface of the drive assembly and the main frame bear too much overturning moment at the yaw stop time,resulting in the tensile stress of 245.21 kN on the coupling surface which exceeds the tensile stress of the yield strength of 220.50 kN.The yaw control strategy is optimized,the release delay of yaw hydraulic brake is changed from 1.5 s to 0.1 s,and the bolt tension is reduced to 220.48 kN.The multi-body dynamics simulation research of yaw system is carried out to provide data support for analyzing and solving yaw system on-site faults,and effectively improves fault solving efficiency.
作者
孙哲杰
白聪儿
陈斌
刘勇
聂新宇
SUN Zhejie;BAI Conger;CHEN Bin;LIU Yong;NIE Xinyu(Research Institute of Science and Innovation,Windey Energy Technology Group Co.,Ltd.,Hangzhou 310012,China;Key Laboratory of Wind Power Technology of Zhejiang Province,Hangzhou 310012,China)
出处
《机电工程》
CAS
北大核心
2024年第11期1947-1957,共11页
Journal of Mechanical & Electrical Engineering
基金
浙江省“尖兵”“领雁”研发攻关计划项目(2022C01178)。
