BDFG无速度传感器离并网平滑切换策略  

Smooth Switching Grid-connection Strategy With Speed Sensorless of BDFG

作　　者：纪辰 苏建徽[1] 王一丁 JI Chen;SU Jian-hui;WANG Yi-ding(Research Center for Photovoltaic System Engineering of Ministry of Education,Hefei University of Technology,Heifei 230009,China)

机构地区：[1]合肥工业大学教育部光伏系统工程研究中心,安徽合肥230009

出　　处：《电力电子技术》2018年第11期11-14,共4页Power Electronics

基　　金：国家自然科学基金(51541703);广东省引进创新科研团队计划(2011N015)~~

摘　　要：无刷双馈发电机(BDFG)相比于有刷双馈电机取消了电刷和滑环,提高了系统的可靠性,无需经常维护,传统BDFG控制策略仍需要编码器等测速装置。利用基于定子控制绕组电流的模型参考自适应(MRAS)方法研究BDFG转速估计算法,并将估计的转速用于并网稳态时的有功、无功功率的解耦控制。由于MRAS转速估计在系统启动和离并网切换阶段存在问题,提出了一种相位比例积分(PI)调节器加无速度传感器离并网平滑切换算法,仿真验证了该算法的合理性和有效性。The brushless doubly-fed generator（BDFG） eliminates brush and slip rings compared to brushed doubly-fed motors,improves system reliability without the need for frequent maintenance, while traditional control strategy of BDFG still requires encoder and other speed measuring equipments.The model reference adaptive system （MRAS） method ba- sed on the stator-controlled winding current is used to research speed estimation algorithm and the estimated speed is used to decouple control the active and reactive power in the steady states.Since MRAS speed estimation has prob- lems in the system start-up and off-grid switching stage.A smooth switching grid-connection strategy which combines phase proportional integral（PI） regulator and non-velocity sensor is proposed, simulation verifies the rationality and ef- fectiveness of the algorithm.

关 键 词：无刷双馈发电机 模型参考自适应 平滑切换 

分 类 号：TM31[电气工程—电机]