考虑实际运行数据的风电场稳态建模

摘要

To establish the steady-state model of a wind farm accurately,a three-machine equivalent steady model is proposed based on the measured data after analyzing the steady-state characteristics of wind turbines in different opera⁃tion regions. First,this paper analyzes the steady active power characteristics of wind turbines in 4 operation regions. By means of improved maximum tree method,the wind turbines are divided into 3 groups according to the measured wind speed data. Then,the wind speed-active power curve and piecewise function are obtained for each group of tur⁃bines based on the 4 operation regions. Finally,a three-machine equivalent steady-state model of a wind farm is estab⁃lished by calculating the equivalent wind speed of the three groups. Simulation results show that the proposed method can effectively improve the accuracy of the steady-state model of a wind farm.%为建立准确的风电场稳态模型，该文分区域分析了风电机组的稳态运行特性，提出一种基于实测数据的三机等效风电场稳态建模方法。首先，分析了风电机组在4个不同运行区域的稳态输出特性；然后，根据风电场内各风电机组的实测风速，采用改进型最大树法将其分类，并建立各类机群的实际风速-功率特性曲线；最后，由风电机组各区域稳态输出特性建立各类机群的风速-功率分段函数关系。在此基础上，计算各类机群的等值风速，从而建立三机等效风电场稳态模型。仿真结果表明三机等效模型可有效提高风电场稳态建模的精度。