湍流对风力发电机输出功率影响的研究

Study on Impact of Turbulent Current on Output Power of Generators

针对风电场中湍流对风能捕获和风力发电的影响,依据"湍流圆"模型、空气动力学模型与经典的湍流强度表达式,反向推导因湍流影响而导致风能捕获的损失。以双馈式感应发电机为例,对其并网功率输出与理论风机功率输出进行比较,分析湍流时风机功率输出曲线变化;利用风电场的实际湍流强度值,通过Fluent软件仿真风机运行情况,证明在湍流影响下,同等风速条件下风机达不到理论受力要求,功率输出下降。

In view of impact of turbulent current in wind farms on wind energy tracking and wind power generation,the article deduces the loss of wind energy tracking caused by turbulent current on the basis of ＂Turbulent Round＂ model,aerodynamics model and classic expression of turbulence intensity.The article takes the double-fed induction generators as an example and compares the output power of connected grids with theoretical output power of wind turbines to analyze curve variation of output power of wind turbines on the condition of turbulent current.By using actual turbulence intensity value of wind farms and simulating operation of wind turbines by Fluent,it is proved that under the circumstance of same wind speed,the wind turbines can not meet the theoretical requirement of stress and the output power reduces due to turbulence.