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Study of ice accretion feature and power characteristics of wind turbines at natural icing environment

机译：自然结冰环境下风力发电机的积冰特性和功率特性研究

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摘要

Wide cold regions with high air density as well as wind speed are much beneficial for the wind energy exploitation. However, wind turbines in these regions always suffer a series of icing issues, especially the blade aerodynamics degradation and much production loss in winter. Therefore, the paper aims to study the ice accretion feature on blades and the effect of ice severity on the power performance of wind turbines at natural icing environment. The ice distribution on the blade is analyzed quantitatively in the image processing method, and it is found that the ice thickness on the blade increases rapidly from the root to the middle of the blade, and then slowly from the middle to the blade tip. In the icing duration period, both the pitch angle and rotor speed of the wind turbine fall remarkably at the same wind speed, and the pitch angle shows more sensitive to the blade icing for wind turbines with the traditional control strategy. Based on the statistical operating data of the 300 kW wind turbine in different icing cases, the rotor performance deteriorates more seriously as the ice thickness of the blade increases, which changes the original matching relation between the rotor and generator. In addition, the ice thickness of the leading edge at r/R= 0.95 shows great correlation with power loss in given icing cases, and this correlation still needs to be studied further at more icing events. The results can provide a reference for the operation performance of wind turbines in cold regions.
机译：高空气密度和风速的寒冷地区对风能的利用非常有利。然而，这些地区的风力涡轮机总是遭受一系列的结冰问题，尤其是叶片的空气动力学性能下降以及冬季的大量生产损失。因此，本文旨在研究叶片在结冰环境中的积冰特征以及结冰强度对风力发电机功率性能的影响。用图像处理方法定量分析叶片上的冰分布，发现叶片上的冰厚度从叶片的根部到中部迅速增加，然后从中部到叶片尖端缓慢增加。在结冰持续时间中，风轮的桨距角和转子速度在相同风速下均显着下降，并且采用传统控制策略，桨距角对风力涡轮机的叶片结冰更加敏感。根据300 kW风力发电机在不同结冰情况下的统计运行数据，随着叶片冰厚度的增加，转子性能会更加严重下降，从而改变了转子与发电机之间的原始匹配关系。另外，在给定的结冰情况下，前缘的冰厚度在r / R = 0.95时显示出与功率损耗的高度相关性，并且在更多结冰事件下仍需要进一步研究这种相关性。研究结果可为寒冷地区风机的运行性能提供参考。

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  • 来源
    《Cold regions science and technology》 |2018年第3期|45-54|共10页
  • 作者

    Shu Lichun; Li Hantao; Hu Qin; Jiang Xingliang; Qiu Gang; McClure Ghyslaine; Yang Hang;

  • 作者单位

    Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing, Peoples R China;

    Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing, Peoples R China;

    Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing, Peoples R China;

    Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing, Peoples R China;

    Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing, Peoples R China;

    Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing, Peoples R China;

    Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ice accretion feature; Power characteristics; Wind turbines; Natural icing environment; Ice thickness;

    机译：积冰功能;功率特性;风力涡轮机;自然结冰环境;冰厚度;

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