为减少风电场内尾流损失,提升整场发电量,基于偏航控制的整场协同控制已成为当前的研究热点。针对现有研究未能充分考虑来流的动态变化和风电场流动的时滞效应等问题,采用高保真大涡模拟方法对风电场流动进行数值仿真,通过流场和邻近机组功率时空相关性确定机组间流动延迟时间,考虑流场流动延迟时间,提出一种湍流入流条件下的风电机组动态偏航控制策略。模拟结果表明,稳态偏航和最佳的动态偏航控制下,风电机组阵列总发电量比无偏航控制下分别提高11.5%和12.5%。相较于稳态偏航控制,动态偏航控制下风电机组间尾流发展更充分,尾流速度恢复更快。
Abstract
In order to reduce the wake loss in the wind farm and enhance the whole field power generation, the whole field cooperative control based on yaw control has become a current research hotspot. To address issues such as existing studies not fully considering the dynamic changes in incoming flow and the time-lag effects of wind farm flow, a high-fidelity large eddy simulation method is used to numerically simulate the wind farm flow, and the flow delay time between units is determined by the spatial and temporal correlation between the flow field and the power of the neighboring units. Considering the flow delay time of the flow field, a dynamic yaw control strategy is proposed for the wind turbine under the turbulent inflow conditions. The large eddy simulation results show that the total power generation of the wind turbine array under static yaw and optimal dynamic yaw control is increased by 11.5% and 12.5%, respectively, compared with that under no yaw control. Compared to the static yaw control, the wake development between the wind turbine array is more fully developed and the wake velocity recovery is faster under dynamic yaw control.
关键词
风电场 /
大涡模拟 /
尾流 /
偏航控制 /
动态入流 /
流场时空相关性
Key words
wind farm /
large eddy simulation /
wakes /
yaw control /
dynamic inflow /
flow field spatial-temporal correlation
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基金
国家重点研发计划（2023YFB4203200）
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