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Load response analysis of wind turbine yaw system based on multi-body dynamics
Published:2024-11-21 author:SUN Zhejie, BAI Conger, CHEN Bin, et al. Browse: 108 Check PDF documents
Load response analysis of wind turbine yaw system 
based on multi-body dynamics


SUN Zhejie1,2, BAI Conger1,2, CHEN Bin1,2, LIU Yong1,2, NIE Xinyu1,2

(1.Research Institute of Science and Innovation, Windey Energy Technology Group Co., Ltd., 

Hangzhou 310012, China; 2.Key Laboratory of Wind Power Technology of Zhejiang 
Province, Hangzhou 310012, China)


Abstract:  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.

Key words: wind turbine; complex excitations; fault diagnosis of yaw system; load response analysis; shutdown strategy; gear meshing contact impact; Simpack/ANSYS

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