无刷双馈风力发电机的设计、分析与控制  

Design,Analysis and Control of Brushless Doubly-Fed Generators for Wind Power Application

作　　者：程明[1] 韩鹏[1] 魏新迟 

机构地区：[1]东南大学电气工程学院,南京210096

出　　处：《电工技术学报》2016年第19期37-53,共17页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51320105002);中达学者基金资助项目

摘　　要：无刷双馈发电机是一类具有两个交流馈电端口和一个公共机械端口的新型发电机。该类电机易于实现变速恒频运行;由于去除了传统双馈发电机中的电刷集电环,具有可靠性高、维护成本低等优点,同时便于实现有功和无功的近似解耦控制,因而被认为是最有希望取代现有双馈发电机的一种电机类型。该文介绍了现有无刷双馈发电机的基本结构与工作原理,总结了它们的共性特点和个性差异以及当前研究中存在的问题;从电机设计角度对比分析了三种主流无刷双馈发电机的功率密度和转矩密度;对其分析设计方法和控制策略进行了综述,讨论了不同无刷双馈发电机在控制上的统一性;基于对无刷双馈电机设计、建模与控制方面的研究,提出一种可以改善功率密度的新型双定子无刷双馈风力发电机结构,并就独立运行和并网运行两种不同工况提出了相应的控制策略,给出了实验结果。最后对该类电机的应用前景和发展方向进行了展望。The brushless doubly-fed machine （BDFM） is a new type of electrical machines with two AC electrical ports and a common mechanical port. It inherently possesses the variable speed constant frequency （VSCF） capability. It has already been widely recognized as the most promising candidate for replacing the slip- ring doubly-fed induction generator （DFIG） for its distinct advantages such as high reliability and reduced maintenance cost due to the elimination of brushes and approximate decoupled control of active and reactive power. This paper introduces the machine topologies and operating principles of a vast variety of existing BDFMs with the similarities, differences and challenges in current research summarized, compares the torque/power density from the perspective of machine design, and overviews the analysis design methods and control strategies, with the internal consistency of control of different BDFMs discussed. Based on the design, modeling, and control of BDFM, a novel dual-stator brushless doubly-fed induction machine is proposed, analyzed, and controlled for stand-alone as well as grid-connected power generation with experimental validation. Finally, the potential applications and future trends of BDFMs are discussed.

关 键 词：无刷双馈发电机 风力发电 控制策略 设计分析方法 内在一致性 功率密度 转矩密度 

分 类 号：TM315[电气工程—电机]