一种适用于低电压穿越中DFIG机侧控制策略研究  

A Control Strategy of Motor Side in Double-fed Induction Generating System During Power Grid Voltage Dips

作　　者：薛永华[1] 李守智[1] 

机构地区：[1]西安理工大学,自动化学院,陕西西安710048

出　　处：《电力电子技术》2012年第2期55-56,107,共3页Power Electronics

摘　　要：依据双馈风力发电机的运行特点,设计了一套机侧变流器的控制系统。在分析双馈电机在d,q旋转坐标系下的控制策略基础上,采用双闭环控制与解耦控制来实现当电网电压出现小幅度跌落(不超过30%)时,电机的低电压运行。理论分析和实验结果表明,该控制策略可以很好地稳定电机的各个控制量,保护变流器安全运行,使双馈电机(DFIG)在电网电压跌落时不脱网运行,电网电压恢复后各个控制量具较好的稳定性,且整个系统具有较好的动态特性。A control strategy of motor side converter in double-fed induction generating（DFIG） system is designed based on the operation characters of the DFIG.The mathematic mode in d,q rotating coordinate of DFIG is analyzed and dual-close-loop control, decoupled control.To achieve a modest drop（not more than 30%） of grid voltage, normal operation during the grid voltage drops.The experimental results show that it can be good and stable control of different amount of each motor in this kind of control strategy,to protect the safe operation of the converter.It doesn＇t break away for the power grid during the power grid dips.After the power grid restored, each control volume has a good stability and dynamic performance.

关 键 词：双馈电机 机侧变流器 解耦控制 低电压穿越 

分 类 号：TM346[电气工程—电机]