集成SMES和CS-SGSC的双馈型风力发电系统

A Doubly Fed Induction Wind Power Generation System Integrated with SMES and CS-SGSC

双馈型风力发电机面临能量输出不稳定和低电压穿越能力弱2个主要问题。为了同时解决这2个问题,提出了一种集成超导储能系统和电流型串联网侧变流器的双馈型风力发电系统。该系统利用超导磁体作为能量储存和缓冲环节,提高了能量输出的稳定性;利用电流型串联网侧变流器实现了对定子电压的保护,提升了双馈型风力发电机的低电压穿越能力。仿真结果证明了该拓扑结构及其控制策略的有效性。

There are two major problems faced by doubly fed induction generator （DFIG） ： poor low voltage ride through （LVRT） capability and fluctuating output power. To solve these problems, a doubly fed induction wind power generation system integrated with superconducting magnetic energy storage （SMES） and current source series grid side converter （CS- SGSC） is proposed. The proposed system can greatly enhance the output power quality of DFIG with the SMES as energy storage and buffering device; it can also protect the stator voltage of DFIG to enhance its LVRT capability. Simulation results verify the effectiveness of the proposed topology and its corresponding control strategies.