摘要
随着风电机组不断大型化,机组运行时所受载荷造成的疲劳损伤已不容忽视,降载控制也逐渐成为风电控制中的研究热点。首先根据IEC风力机认证标准,采用5 MW风电机组进行运行仿真,分析了机组在半波阵风及湍流风况下各关键承载部件的载荷分布规律。然后基于材料疲劳寿命估计理论,建立一种短期载荷疲劳损伤评估与计算方法,并以一段叶根短期载荷时间历程数据为例计算了短期等效疲劳损伤。最后根据载荷分析的结论,针对基于坐标变换的独立变桨控制进行了降载策略优化与控制器参数优化,并对控制结果进行了疲劳损伤评价与对比。仿真结果表明,优化后的控制器显著提升了机组在大范围波动的风况下的载荷优化效果,有效地降低了叶根疲劳损伤。
With the increasing capacity of wind turbines,the damage caused by the fatigue load cannot be ignored any more,and the load reduction control has gradually become a research hotspot in wind power control.In this paper,based on the IEC wind turbine certification standard,the NREL 5 MW wind turbine was used to simulate the load distribution of the key components under the half-wave gust and turbulent wind conditions.Then,based on the material fatigue life estimation theory,a short-term load fatigue damage assessment method was proposed,and as an example,the short-term equivalent fatigue damage was calculated by taking a short-term load data of the blade root.Finally,according to the conclusion of load analysis,the optimization of the load reduction strategy and the control parameters optimization were carried out for the individual pitch control based on coordinate transformation,and the fatigue damage evaluation and comparison of the control results were completed.The simulation results showed that:the optimized controller significantly improved the load optimization effect under wide-range turbulent wind condition,and effectively reduced the blade root fatigue damage.
作者
赵春溢
廖礼
李东海
雷海东
高峰
ZHAO Chunyi;LIAO Li;LI Donghai;LEI Haidong;GAO Feng(China Power Investment Northeast New Energy Co.,Ltd.,Shenyang 110000,China;School of Control and Computer Engineering,North China Electric Power University,Beijing 102206,China;National Power Investment Northeast Electric Power Co.,Ltd.,Shenyang 110000,China)
出处
《电力科学与工程》
2019年第9期70-78,共9页
Electric Power Science and Engineering
关键词
大型风电机组
载荷分析
疲劳损伤估计
降载荷控制
独立变桨
large wind turbine
load analysis
fatigue damage estimation
load reduction control
individual pitch control
