永磁直驱风电机组低电压穿越研究综述

风电的大规模发展使越来越多的永磁直驱风电机组接入电网,影响电网安全稳定运行,其中风电机组的低电压穿越(LVRT)问题是风电并网安全性方面的首要问题。文中首先基于传统风电场和其他新能源发电场LVRT策略的研究成果,结合永磁直驱风电机组特点,综述较为主流的适用于永磁直驱风电场的LVRT技术手段,为永磁直驱机型为主的风电场提供相应策略。然后,分析各个方法的应用场景与工作机理,比较不同方法的优势与不足,并针对不同方法的应用前景提出相应建议。最后,总结未来LVRT技术的发展方向,并指出当前风电场大规模并网仍需解决的经济技术难题,为进一步提升大规模风电安全消纳水平指明方向。

Reviews of LVRT technology for D-PMSG

The large-scale development of wind power has enabled more and more permanent magnet direct drive wind turbines to be con-nected to the grid, which casts risks on the safe and stable operation of the power grid. Among them, the low voltage ride through problem of wind turbines is the primary issue in terms of the safety of wind power grid connection. To provide corresponding strategies for wind farms based on permanent magnet direct drive wind turbines, starting with the existing research results of LVRT technology for traditional wind farms and other new energy power plants, this paper gives out a review of several main-stream LVRT technologies suitable for permanent magnet direct-drive wind farms based on the features of direct-driven perma-nent magnet synchronous generator. This paper analyses the application scenarios and working mechanism of each methods and compares the advantages and disadvantages of different methods, giving suggestions on the future application prospects of them. At the end of the paper, the future development direction of LVRT technology, the economic and technical problems that still need to be solved in the current large-scale grid-connected wind farms are summarized, which points out the direction for further re-searches in the future.