不平衡负载下独立运行双馈发电系统的矢量控制  

Vector Control of Stand-alone Doubly-fed Wind Power Generation System Under Unbalanced Loads

作　　者：张芳源 景云 王丹 ZHANG Fangyuan;JING Yun;WANG Dan(Marine Electrical Engineering College,Dalian Maritime University,Dalian 116026,Liaoning,China;Haitian Industrial Technology Co.,Ltd.,Dalian 116026,Liaoning,China)

机构地区：[1]大连海事大学船舶电气工程学院,辽宁大连116026 [2]大连海天兴业科技有限公司,辽宁大连116026

出　　处：《电气传动》2022年第20期11-18,共8页Electric Drive

基　　金：国家自然科学基金(52071044,51979020,51909021,51939001);中国博士后科学基金(2019M650086);大连市杰出青年科技人才计划(2018RJ08);交通运输部高层次人才计划(2018-030);中央高校基本科研业务费(3132019319)。

摘　　要：针对连接不平衡负载的双馈电机独立运行控制,提出一种基于改进超螺旋观测器和非奇异终端滑模的矢量控制方法。通过改进超螺旋观测器观测转子电流的基频和二倍频分量,减少对双馈电机参数的依赖,提高系统的抗干扰能力。设计基于改进超螺旋观测器的非奇异终端滑模转子电流控制器,消除由不平衡负载引起的滑模面波动,增强对二倍频交流给定信号的跟踪性能,进而改善对负序定子电压的抑制能力。仿真与实验结果表明,所提方法能够在不平衡负载条件下有效抑制定子电压中的负序分量,具有优异的动静态性能。A vector control method based on the modified super-twisting observer and non-singular terminal sliding mode was proposed for stand-alone doubly-fed wind power generation systems under unbalanced loads.The fundamental frequency and double frequency components of the rotor current were observed by the modified supertwisting observer,which reduces the dependence on the parameters of the doubly-fed wind power generation and improves the anti-interference ability of the system.A non-singular terminal sliding mode rotor current controller based on a modified super-twisting observer was designed,which eliminates the sliding mode surface fluctuation caused by unbalanced loads,enhances the tracking performance of the AC given,and improves the suppression ability of negative sequence stator voltage.Simulation and experimental results show that the proposed method can effectively suppress the negative sequence component of stator voltage under unbalanced load conditions,and has the excellent dynamic and static performance.

关 键 词：双馈感应发电机 独立运行 矢量控制 滑模控制 超螺旋观测器 

分 类 号：TM315[电气工程—电机]