反馈线性化控制在DFIG直流变换系统的研究

Feedback Linearization Control Scheme for DFIG with DC-based Converter System

文章提出了基于双馈风力发电机直流变换系统的输入输出反馈线性化控制策略。首先,通过输入输出反馈线性化方法实现双馈式风力发电机变流系统的线性化,实现强耦合系统的完全解耦。其次,双馈风力发电机的定转子变流器的输入输出反馈线性化控制器实现了双馈式风力发电机运行在最大功率点(MPP)以及定子磁链的稳定与转子电流快速跟踪其参考值。最后,搭建了系统的仿真平台。仿真结果验证了所提控制策略的可行性,即使在变风速情况下仍能够实现参考的准确追踪。

This paper proposes feedback linearization control（FBLC） scheme for the strongly-coupled DFIG with DC-based converter system which applied in the VSC-HVDC power transmission system. Therefore, FBLC is adopted to control the strongly coupled system and linearize the system with full decoupling. FBLC controllers for RSC and SSC are designed to guarantee that DFIG operates at maximum power point（MPP） and stator flux keeps stable and the rotor current could track its reference closely and quickly in the stator flux-oriented frame. At last, the simulation is carried out. The results validate the feasibility of the proposed control scheme even if in the case of ramp-change wind speed.