基于转子电流的双馈感应电机无速度传感器控制  

Rotor Current Based Sensorless Control for Doubly-fed Induction Machine

作　　者：高乐[1] 周有庆[1] 徐隆亚[2] 管博[2] 

机构地区：[1]湖南大学电气与信息工程学院,湖南省长沙市410082 [2]俄亥俄州立大学电气与计算机工程学院,美国俄亥俄州哥伦布市43210

出　　处：《电力系统自动化》2010年第13期61-65,共5页Automation of Electric Power Systems

摘　　要：提出一种基于转子电流的模型参考自适应系统(MRAS)的双馈感应电机(DFIM)无速度传感器控制方法。首先建立了基于定子磁链定向的DFIM矢量控制模型,实现了电机转速/转矩控制和有功/无功功率解耦控制,然后采用基于MRAS的转速辨识方法,将测量得到的转子电流作为参考模型,通过定子电压和电流估测得到的转子电流作为自适应模型,用PI闭环控制构造转子位置和转速信息。为验证理论分析的正确性,以50 kW的DFIM为例设计了一套控制系统。通过电动机运行工况下的空载变速实验和发电机运行工况下的功率控制实验,估测转子位置和转速在不同转速和功率工况下都能准确跟踪实际值。仿真和实验结果表明系统能实现对DFIM无速度传感器控制,证明了所提出的方案的可行性。This paper presents a sensorless algorithm for the vector control of doubly-fed induction machine （DFIM） using rotor current based model reference adaptive system （MRAS） observer. The stator flux oriented vector control is employed to achieve variable-speed drive and decoupled active/reactive power control. In the proposed MRAS observer, the reference model is the measured rotor current, in comparison with the estimated rotor current obtained from the stator voltages and currents. A proportional-integral （PI） control adjusts the rotational rotor speed, driving the error between the measured and estimated currents to zero. A 50 kW DFIM prototype system is built to verify the theoretical analysis. Using estimated rotational speed and rotor position, both no load variable speed .tracking and decoupled active/reactive power control are achieved in experimental testing. The simulation and laboratory experimental results show the effectiveness of the proposed sensorless control scheme.

关 键 词：双馈感应电机 模型参考自适应系统 无传感器控制 风力发电 

分 类 号：TM346[电气工程—电机]