变速恒频双馈风力发电系统励磁控制策略仿真研究

The Simulation and Study on Excitation Control Strategy of Variable-Speed Constant-Frequency Double-Feed Wind Energy Generation System

能源问题正受到全世界的广泛关注,风能的有效开发利用变得愈加重要,因此先进的风力发电技术的研究成为热点。变速恒频(VSCF)双馈风力发电系统是目前风力发电系统的主流,在该系统中,励磁控制技术的研究是关键。对VSCF双馈风力发电机组的基本功率控制策略进行了研究。在额定风速以下运行时,转子励磁控制系统通过双馈发电机转速的控制,跟踪最佳风能利用系数曲线以获得最大功率,给出了最佳风能捕获控制系统励磁控制算法。在高于额定风速运行时,通过变桨距和励磁控制技术相结合实现恒功率控制,建立了简洁、直观的变桨距控制与励磁控制的控制算法,并对控制算法进行了仿真。

The problem of energy sources are receiving publicity world widely, effectively exploiting and making use of wind energy source are becoming more and more important, so research of advanced wind power generation technology is the hot point. The Variable-Speed Constant-Frequency （VSCF） wind energy generation system with Double-Fed Induction Generator is the main trend in the system, the study of the excitation control technique is the key in the system. The fundamental power control tactics of the VSCF double fed wind power generator have been studied. During operating below rated wind speed, rotator excitation control system track the best wind energy operating ratio for gaining a maximum power by the control of rotation of generator, has given the best wind energy capture control system block and the excitation controlling algorithm. During operating over rated wind speed, constant power control have been realized through the combination of pitch regulation and excitation control technique, have built the control algorithm and the control model block of pitch regulation control and excitation control, and have carried out simulation on the control algorithm.