本项目研究电网暂态故障（对称、不对称暂态高、低电压）下大规模集中并网典型风电机群（双馈型、全功率型）的不脱网可控运行及电网暂态同步稳定控制的基础理论和关键技术，包括暂态故障对风电机组及风电机群故障行为对含大规模风电电力系统的影响评估；电网故障下增强含大规模风电电力系统暂态同步稳定的风电机群不脱网可控对策研究。具体研究：包括故障电网、典型风机、变流器在内的完整风电机组暂态模型；故障电网与风电机群间的相互影响与依存关系；电网故障下典型风电机群不脱网运行的暂态控制策略；电网故障下风电机群的暂态同步控制理论及有功、无功出力与爬坡特性优化方法。本项目的研究将改变我国尚未对大规模集中并网风电在电网暂态故障下的不脱网可控运行及电网暂态同步稳定控制研究的落后局面，使理论成果领先国际风电技术研究水平，为解决我国风电大面积脱网提供支撑，增强含大规模风电电力系统的安全稳定运行能力，推动我国风电规模化开发与利用。

This proposal aims to investigate the basic theories and key technologies of ride-through operation of large-scale typical wind turbines with high penetrations, as well as transient synchronizing control of power network under transient grid fault conditions, i.e., symmetrical/asymmetrical and high/low voltage faults. The typical wind turbines are based on doubly fed induction generators and fully rated converters, respectively. The impacts of transient grid faults on the typical wind turbines and their various fault behaviors on the power network with large-scale wind powers are identified and analyzed in detail. The ride-through control strategies of wind turbines are presented to enhance the transient synchronizing stability of power system with highly-penetrated wind power. The specific research contents contain transient modeling of faulted network, typical wind turbines and their grid- / machine-side converters in terms of positive- / negative-sequence components in natural and forced electromagnetic quantities; mutual influence and interdependence between transient fault network and typical wind turbines; transient control strategies of typical wind turbines to realize their ride-through operations during network faults; transient synchronizing control theory of wind turbines as well as the optimization methodology of their active/reactive outputs and ramp characteristics under faulted network conditions. The achievements of this proposal will change the backward situation in China in terms of investigating controllable ride-through operation of large-scale highly-penetrated wind turbines, especially the transient synchronizing control of power network under the conditions of transient grid faults. These research results will be in advanced level compared with foreign wind power generation technology in theory, and will provide theoretical support and reference to solve the issues on large amounts of wind turbines’ grid disconnections in China at present. Further, the accomplishment of this proposal is to contribute to the reinforcement of security and stability of power network with highly-penetrated wind turbines and will promote larger scale of development and utilization of wind power in China in the future.