永磁同步风电机组发电机定子温度建模方法

MODELING METHOD OF STATOR TEMPERATURE OF PMSG WIND TURBINE

针对山地风电场大型永磁同步风电机组发电机定子温度的变化特点及传热过程进行分析,提出一种基于风电机组SCADA数据的发电机定子温度建模方法。首先,分析风电机组在实际运行过程中定子温度的变化情况;然后,根据永磁同步发电机内部的传热过程,对发电机定子温度建模;最后,采用风电机组正常运行时的SCADA数据求解模型参数。实例分析表明,风电机组状态正常时,定子温度估计的平均误差绝对值为0.59℃,模型精度较高;风电机组状态异常时,模型温度估计的平均误差绝对值为5.17℃,精度显著降低。

By analyzing the temperature change characteristics and heat transfer process of the generator stator of large permanent magnet synchronous generator(PMSG)in mountain wind farm,a wind turbine SCADA data-based generator stator temperature modeling method was proposed in this paper.Firstly,the change of stator temperature in the operating process of wind turbine was analyzed and then the generator stator temperature was modeled according to the heat transfer process in PMSG;Finally,the model parameters were solved by using SCADA data of wind turbine in normal operation.According to the instance analysis results,the average error absolute of temperature estimation of the model is 0.59℃and the model is highly accurate when the wind turbine is in normal state;when the wind turbine state is abnormal,the average error absolute of the model temperature estimation is 5.17℃,and the accuracy is significantly reduced.The model can be used for wind turbine state assessment.