摘要
基于永磁同步发电机(PMSG)的直驱型风力发电机通常采用无速度传感器技术进行驱动控制。考虑到风力发电机中PMSG的运行特点,基于基波励磁法的转子磁链位置观测方案较适合这一应用场合。基于此,提出一种新颖的基波励磁法观测方案,该观测方案由扩展磁链观测器和用于对观测到的扩展磁链进行同步进而获得转子磁链位置信息的锁相环共同组成。该扩展磁链观测器具有最小阶,且无需对内嵌式PMSG的凸极特性进行忽略近似。在对该扩展磁链观测器的结构机理及其稳定性进行推导和讨论的基础上,对位置观测器的设计过程进行了探讨。11kW PMSG的实验验证了该无速度传感器控制方案的性能。
In the direct-driven wind turbines,the permanent magnet synchronous generator（PMSG） usually is driven with sensorless control strategies.Considering the operation features of PMSG in wind turbines,the fundamental excitation based position estimators are feasible.A novel estimator of this kind is proposed,which is composed of an extended-flux observer and a phase-lock-loop（PLL） control to get in phase with the observed flux.The proposed observer,where the parameters of PMSG are utilized in the simplest manner,has the minimum order without any approximation on its mathematical model.Based on the derivation and discussion on structure and stability of the proposed extended-flux observer,the design process of the observer is presented.Experiments on a 11 kW PMSG validate the performance of the proposed sensorless control strategy.
出处
《电力系统自动化》
EI
CSCD
北大核心
2011年第8期93-96,共4页
Automation of Electric Power Systems
基金
安徽省自然科学基金资助项目(090412049)~~
关键词
无速度传感器
扩展磁链观测器
锁相环
永磁同步发电机
风力发电
sensorless control
extended-flux observer
phase-lock-loop（PLL）
permanent magnet synchronous generator（PMSG）
wind power generation
