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Abstract：
Wind power systems are a promising form of energy supply. At present, most of the studies focuses on the performance of individual components such as wind rotors or generators, and the overall output effect of wind power system is determined by the characteristics of wind rotor and generator and their combined characteristics. However, the evaluation of the overall output characteristics of the system is rarely considered. In order to investigate the overall output of the system quickly, a performance matching method of wind rotor and generator based on energy transfer is proposed in this paper. Based on the series operating characteristics of the wind power system model, the energy transformation process of the wind rotor, generator and the whole system are unified described by energy transfer. On the premise that the performance of wind rotor and generator is known, the transfer function model of each component is established, and on this basis, the transfer function model of the overall system is obtained. Then, the overall output effect of the system is analyzed and evaluated by this system transfer function model. The performance of the model is analyzed and compared by using a vertical axis wind power system coupling test bench and MATLAB/Simulink software. The results show that the error between the system output based on the theoretical model and the wind tunnel test is less than 6.5%, and the trend of the simulation and the test curve of the system output is consistent. Therefore, this method can be used to quickly predict the overall output performance of the wind turbine and generator on the premise that the performance of each component is known, without the need to connect each component to a wind power system for testing.
摘要：
风力发电系统是一种有前途的能源供应形式。目前,大多数研究集中在单个部件的性能，如风力转子或发电机，风轮和发电机的特性及其综合特性决定了风力发电系统的整体输出效果。然而,很少考虑对系统整体输出特性的评估。为了快速调查系统的整体输出，提出了一种基于能量传递的风力发电机与转子的性能匹配方法。基于风电系统模型的串联运行特性,风力转子的能量转换过程，发电机和整个系统由能量传递统一描述。在已知风力转子和发电机性能的前提下,建立了各分量的传递函数模型,在此基础上,得到了整个系统的传递函数模型。然后，利用该系统传递函数模型对系统的整体输出效果进行了分析和评价。利用垂直轴风力发电系统耦合试验台和MATLAB/Simulink软件对模型的性能进行了分析比较。结果表明,基于理论模型的系统输出与风洞试验的误差小于6.5%,系统输出的仿真和测试曲线的趋势是一致的。因此,该方法可在已知各部件性能的前提下,快速预测风电机组和发电机的整体输出性能,无需将每个组件连接到风力发电系统进行测试。
