双馈电机电压跌落电磁转矩特性研究  

Research on DFIG Voltage Drop Electromagnetic Torque Characteristics

作　　者：丁婧 张建华 沈浩然 

机构地区：[1]扬州大学,江苏扬州225127

出　　处：《微特电机》2013年第7期24-27,共4页Small & Special Electrical Machines

基　　金：江苏省高校自然科学基础研究项目(08KJD480001)

摘　　要：由于双馈风力发电机在电网发生电压跌落故障时存在很大的冲击电流,由此产生冲击的电磁转矩,对发电机本身及其传动机构产生不利的影响,为此必须对双馈风力发电机在电压跌落时的电磁转矩特性进行研究。在考虑定、转子磁链变化的基础上建立了电压跌落时双馈电机的数学模型,研究在发生电网电压跌落故障时双馈发电机的电磁转矩特性。在理论分析基础上,对在电压跌落时双馈电机的转矩特性进行仿真。电压跌落电磁转矩特性的研究,为电压跌落时双馈电机的保护以及低电压穿越的研究提供理论基础。Because of DFIG has high impact current in power grid voltage sag faults,the electromagnetic torque resulting from impact,have a negative impact on the generator itself and its transmission mechanism,so it is necessary to study the torque characteristics of the DFIG in the voltage drop.The voltage drop model of the DFIG was established based on consideration of the stator and rotor flux variation,and the electromagnetic torque of the DFIG at the grid voltage sag faults was studied.On the basis of theoretical analysis,the torque characteristics of the DFIG were simulated in power grid voltage sag faults.Research on voltage sag electromagnetic torque characteristics provide a theoretical basis for the protection of the DFIG voltage drop and the study on the low voltage ride through.

关 键 词：风力发电 双馈电机 电磁转矩 电压跌落 

分 类 号：TM34[电气工程—电机] TM315