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Feed Forward Wind Turbine Control Using Upwind Turbines as Sensors

机译：前风轮机为传感器的前馈风轮机控制

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摘要

This dissertation seeks to improve the performance of a downwind turbine using information obtained from an upwind turbine. Methods for using an upwind tur- bine as a sensor are examined and evaluated. Next, a feed forward optimum pitch control scheme is introduced and investigated using a series of FAST simulations. In this control scheme an upwind is used as a wind speed sensor. Wind speed measurements are passed from the upwind turbine to a downwind turbine. The downwind turbine uses the knowledge of incoming wind speed to proactively adjust turbine blade pitch. Initial simulations are promising, but ultimately the feed for- ward control system is found to be very sensitive to timing errors. This makes the control scheme impractical in real world applications. A feed forward derating con- trol scheme is then developed. In this control scheme the rotor speed of the upwind turbine is monitored for evidence of an extreme gust event. If an extreme gust is de- tected the downwind turbine is derated to mitigate the negative e ects of the gust. A series of FAST simulations show that this control scheme can reduce structural loads and rotor overspeeds in the downwind turbine. Unlike feed forward optimal pitch control, this system is insensitive to timing errors. A more sophisticated wind farm simulation tool, SOWFA, is then used to simulate and evaluate feed forward derating control. First, a verification and validation study of SOWFA is carried out. Good agreement is found between SOWFA, OVERFLOW2 and FAST results. SOWFA is then used to simulate two test cases where turbines are subjected to ex- treme coherent gusts. In both test cases feed forward derating control significantly improves performance, reducing damage equivalent loads and increasing energy capture.
机译：本文试图利用从逆风涡轮机获得的信息来改善顺风涡轮机的性能。检查并评估了使用上风轮机作为传感器的方法。接下来，介绍了前馈最佳俯仰控制方案，并使用一系列FAST仿真进行了研究。在该控制方案中，将迎风用作风速传感器。风速测量值从上风轮机传递到下风轮机。顺风涡轮机利用输入风速的知识主动调整涡轮机叶片的桨距。最初的模拟很有希望，但最终发现前馈控制系统对定时误差非常敏感。这使得控制方案在实际应用中不切实际。然后制定了前馈降额控制方案。在该控制方案中，对逆风涡轮的转子速度进行监视，以查找极端阵风事件的证据。如果检测到阵风，则降低顺风涡轮的风量，以减轻阵风的负面影响。一系列FAST仿真表明，该控制方案可以降低顺风涡轮机的结构载荷和转子超速。与前馈最佳音调控制不同，该系统对定时误差不敏感。然后，使用更复杂的风电场仿真工具SOWFA来仿真和评估前馈降额控制。首先，对SOWFA进行了验证和确认研究。在SOWFA，OVERFLOW2和FAST结果之间找到了很好的一致性。然后，将SOWFA用于模拟两个测试案例，其中涡轮遭受极端连贯的阵风。在这两个测试案例中，前馈降额控制都可以显着提高性能，减少等效损伤负载并增加能量捕获。

著录项

  • 作者

    Anderson, Eric William.;

  • 作者单位

    University of California, Davis.;

  • 授予单位 University of California, Davis.;
  • 学科 Mechanical engineering.
  • 学位 Ph.D.
  • 年度 2017
  • 页码 254 p.
  • 总页数 254
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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