电压跌落至不同程度时双馈风力发电机内部电磁场分析

摘要

随着风电规模的日趋庞大和低电压穿越技术的日趋成熟,人们迫切需要知道电机内部在低电压穿越工况下的电磁场变化,为电机的故障诊断提供依据.求出了双馈风力发电机在电网电压跌落至不同程度时的电机内部的电磁场,并在此基础上分析了电机内部电磁场的不同和变化趋势,为分析风机的早期故障诊断及其演化趋势做基础工作.%The increasingly large scale of wind power and low voltage ride through technology is becoming mature,there is an urgent need to know the motor inside the low voltage ride through the conditions of the electromagnetic field changes,to provide the basis for the motor fault diagnosis.Electromagnetic field of doubly-fed induction generator (DFIG) during the grid voltage drop to different extent of the motor were analyzed,and on this basis,analysis the different and changing trends of the electromagnetic field inside the motor,was used as the basis for the doubly fed wind turbine fault diagnosis.