变速恒频双馈风力发电系统实验研究

Experimental research on VSCF wind energy generation system with DFIG

为方便在实验室对双馈风力发电系统进行研究,研制了一套双馈风力发电实验平台.为在该实验平台上实现双馈风电系统的并网运行,给出了基于定子磁链定向的双馈感应发电机并网运行励磁矢量控制策略,并对空载并网方式和直接并网方式进行了比较.在该实验平台上采用直接并网方式进行并网,并对并网型双馈风力发电系统运行特性进行了研究,实验结果表明,双馈电机通过直接并网方式并网时效果良好,并网后系统动静态性能良好.

In order to study the performance of the variable-speed constant-frequency （VSCF） wind energy generation system with doubly fed induction generator （DFIG）, an experimental set of small capacity is developed. Based on the stator flux-oriented vector control, the excitation vector control strategy for the grid-connected DFIG is put forward. The no-load cutting-in control is compared with the direct cutting-in control. The experimental investigation is made to further verify the effect of the direct cutting-in scheme and excitation vector control strategy of grid-connected DFIG. The results offer a good review of cutting-in process and the dynamic and static performance of the grid-connected DFIG system.