基于预测无差拍算法的永磁同步发电机无传感器控制  

A Sensor-Less Control Scheme for Permanent Magnet Synchronous Generators Using Predictive Dead-Beat Algorithm

作　　者：童力[1] 邹旭东[1] 丰树帅[1] 黄清军[1] 张允[2] 康勇[1] 

机构地区：[1]华中科技大学强电磁工程与新技术国家重点实验室,武汉430074 [2]湖南省电力公司供电服务中心,长沙410007

出　　处：《电工技术学报》2013年第3期17-26,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金重点资助项目(50837003);国家973计划资助项目(2012CB215100)

摘　　要：针对永磁同步发电机(PMSG)提出了一种基于预测无差拍算法的高性能无传感器控制方案。为了获得出色的无传感器控制性能,提出对引入无差拍控制器的估算反电动势进行串联补偿,在改善系统稳定性的同时,实现了定子电流的无静差跟踪。随后,基于Luenberger算法对定子电流超前预测,补偿数字控制一拍滞后的影响,并在维持系统稳定性的前提下,根据离散控制模型设计控制器参数,以改善定子电流环的动态响应及其适应电机参数变化的鲁棒性。在此基础上,基于估算反电动势的同步锁相环(SRF-PLL)能够快速、准确地观测转子的位置角和转速信息,并实现电机控制的同步定向和速度反馈调节。最后,基于10kW永磁同步发电机建立模拟的直驱式发电机组,对本文所提控制方案的有效性和可行性进行了仿真分析和实验验证。This paper proposes a high-performance sensor-less control scheme using predictive dead-beat algorithm for the permanent magnet synchronous generators（PMSG）. To derive excellent sensor-less control performances, the estimated back EMF in cascade with a compensator is proposed to be applied into dead-beat controller, achieving both the stability improvement and null error tracking performance of stator current. Then, advanced prediction of stator current by Luenberger algorithm is further adopted to eliminate negative effects of the one-step-delay, and on premise of system stability, parameters in discrete control model are designed to improve both the dynamic responses and robust- ness against parameter variations. On this basis, the synchronous rotating frame phase lock loop（SRF-PLL） that incorporates the estimated back EMF could observe the rotor position angle and speed, which to be well involved in achieving the flux-orientation and speed feedback regulation. Finally, simulation analysis and experimental results from a 10kW PMSG-based prototype direct-driven power generation system are shown to well verify the effectiveness and feasibility of the proposed sensor-less control scheme.

关 键 词：无传感器控制 串联补偿 预测无差拍 同步锁相环 

分 类 号：TM351[电气工程—电机]