Dynamic wind turbine output power reduction under varying wind speed conditions due to inertia
Dynamic wind turbine output power reduction under varying wind speed conditions due to inertia
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DOI：
10.1002/we.1507
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发表时间：
2013-05
期刊：
影响因子：
4.1
通讯作者：
Chun Tang;W. Soong;P. Freere;M. Pathmanathan;N. Ertugrul
中科院分区：
文献类型：
--
作者：
Chun Tang;W. Soong;P. Freere;M. Pathmanathan;N. Ertugrul
风力涡轮机的惯性导致其输出功率减少，这是因为它们无法在动态风条件下的涡轮机最大性能系数点运行。在本文中，假设采用稳态最优转矩控制策略，对这种动态功率降低进行了解析和仿真研究。介绍了自然水轮机时间常数和实际水轮机时间常数的概念，并对这些参数的典型值进行了检验。结果表明，对于所采用的典型涡轮机性能曲线系数，可以假定平均风速由平均风速决定。在此基础上，给出了正弦波风速变化条件下，无限转动惯量和有限转动惯量下的功率折减的解析表达式。然后将结果推广到任意风速剖面。利用数值风力机系统仿真模型验证了阶跃风速和正弦波风速变化的分析结果。最后，用实际风速数据与分析预测结果进行了比较。版权所有©2012 John Wiley&Sons，Ltd.
The inertia of wind turbines causes a reduction in their output power due to their inability to operate at the turbine maximum co-efficient of performance point under dynamic wind conditions. In this paper, this dynamic power reduction is studied analytically and using simulations, assuming that a steady-state optimal torque control strategy is used. The concepts of the natural and actual turbine time-constant are introduced, and typical values for these parameters are examined. It is shown that for the typical turbine co-efficient of performance curve used, the average turbine speed can be assumed to be determined by the average wind speed. With this assumption, analytical expressions for the power reduction with infinite and then finite turbine inertia are determined for sine-wave wind speed variations. The results are then generalized for arbitrary wind speed profiles. A numerical wind turbine system simulation model is used to validate the analytical results for step and sine-wave wind speed variations. Finally, it is used with real wind speed data to compare with the analytical predictions. Copyright © 2012 John Wiley & Sons, Ltd.