重庆大学学报Issue(1)：46-53,8.DOI:10.11835/j.issn.1000-582X.2014.01.008
基于超级电容的永磁同步风力发电机不对称故障穿越方法
摘要
Abstract
With the rapid increasing interaction between wind turbines and power systems,wind turbines have to have the fault ride-through (FRT)capability to ensure the safe operation of power grid.In order to improve the asymmetric FRT capability of permanent magnet synchronous generator (PMSG ) wind turbine,a novel control FRT method based on super-capacitors is proposed.In this method,super-capacitors are connected to the DC bus of AC-DC-AC converter via a bi-directional DC-DC converter,and the power processed by the super-capacitors is controlled to limit the increasing of the DC bus voltage of the AC-DC-AC converter in grid failure condition,and to reduce the 2nd order voltage ripple in the DC bus. Meanwhile,the proposed control method employs the grid voltage feed-forward approach to reduce the negative sequence current component in the grid side converter.According to the low voltage ride through (LVRT)standard,the selection of the super-capacitor capacity is also discussed,and then a mathematical model of the super-capacitor with the bi-directional DC-DC converter is established for designing the controller.Simulation results for a 1MW PMSG wind turbine by MATLAB show that the proposed control method reduces both the negative sequence current component in grid side converter and the 2nd order voltage ripple in DC link at the same time.The results also demonstrate that the asymmetric FRT capability of PMSG wind turbine is improved,which verifies the effectiveness of the proposed control method in this paper.关键词
风力发电/永磁同步发电机/不对称故障/电容/故障穿越Key words
wind turbines/permanent magnet synchronous generator/asymmetric fault/capacitors/fault ride-through分类
信息技术与安全科学引用本文复制引用
杜雄,彭国秀,戴朋岑,周雒维..基于超级电容的永磁同步风力发电机不对称故障穿越方法[J].重庆大学学报,2014,(1):46-53,8.基金项目
全国优秀博士论文作者专项基金资助项目（200948）；教育部新世纪人才计划项目（NCET-09-0839）；重庆市杰出青年科学基金项目 （）
