用于风机疲劳寿命实时追踪的高阶峰谷识别方法
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关键词：风力发电机；疲劳寿命；应力循环；高阶峰谷识别方法；雨流计数法中图分类号：TK83文献标志码：ADOI：10.7652/xjtuxb202507010 文章编号： 0253-987X（2025）07-0099-09
High-Order Peak-Valley Identification Method for Real-Time Tracking of Wind TurbineFatigue Life
GUIJiabin，LILiangxing，GUO Yiwen （StateKeyLaboratoryofMultiphaseFlowinPower Engineering，Jiaotong University，Xi’an71o049，）
Abstract： In order to meet the demand for real-time fatigue life tracking in wind farms and to reduce operation and maintenance costs，a novel high-order peak-valley identification method is proposed to address the insufficiency of real-time performance in traditional stress cycle identification algorithms. This method identifies peak-valley sequence data of wind turbine loads， introducing the concepts of half-cycles and high-order interval cycles to achieve fast and accurate fatigue life assessment. The research results indicate that the high-order peak-valley identification method achieves better computational accuracy than the variable range mean method and is comparable to the rain flow counting method. Furthermore，its computational response speed far exceeds that of the rain flow counting method，with a computational acceleration ratio of over 5 times compared to performance without this method for each wind turbine. The high-order peakvalley identification method is applied to analyze the tower thrust and main shaft torque data of wind turbines and to calculate the equivalent fatigue load and accumulative fatigue damage. As time increases，damage grows rapidly in the early stages and then gradually slows down，with significant diffrences in the growth rates of cumulative fatigue damage among different wind turbines. The high-order peak-valley identification method can effectively reduce the computation time for fatigue life assessment，which is significant for improving the safety and economic efficiency of wind farms.
Keywords： wind turbines；fatigue life； stress cycles；high-order peak-valey identification method; rainflow counting method
风能是重要的可再生能源，风能的高效利用和风电的快速发展对实现“双碳”目标具有重要意义[1]。（剩余12918字）