基于超级电容器储能的直驱风电系统并网性能分析  

Analysis on Power Quality of Grid-Connected Direct-Driven Wind Power System with Super Capacitor Storage Energy

作　　者：冬雷[1] 张新宇[1] 黄晓江[1] 廖晓钟[1] 杨莹[1] 

机构地区：[1]北京理工大学自动化学院,北京100081

出　　处：《北京理工大学学报》2012年第7期709-714,共6页Transactions of Beijing Institute of Technology

摘　　要：为改善直驱风电系统的并网性能,在直流母线电压端并入超级电容器储能装置.分析了基于超级电容器储能的直驱风电系统模型,设计了控制策略,通过控制双向直流变换器及并网变流器,抑制风机功率的波动以向电网输出平滑的功率.在电网电压跌落时,使直驱风电系统安全实现低电压穿越,并向电网提供一定的无功功率支撑.利用依兰风电场18#风机实际输出功率作为控制对象进行仿真.结果表明,加入超级电容器储能装置可以改善直驱风电系统的并网性能.Super capacitor energy storage（SCES） device connected in parallel with DC-bus was used to improve the grid-connected power quality of direct-driven wind power system with permanent magnet synchronous generator（PMSG）.The system model was analyzed and the control scheme was designed.By controlling the bi-directional DC/DC converter and the grid-side converter,the fluctuation of wind power could be restricted so that the active grid power is smooth.During the grid voltage sags,wing system low voltage ride through（LVRT） could be realized to apply certain reactive power support to power grid.Simulation has been done to test the output power of No.18 wind turbine at Yilan wind farm.The results show that,the grid power quality of the direct-driven wind power system could be improved with the aid of SCES device.

关 键 词：直驱风电系统 超级电容器储能 有功功率平滑 低电压穿越 无功功率支撑 

分 类 号：TM614[电气工程—电力系统及自动化] TM53