自稳速型风电机组的传动特性与性能仿真研究

Wind power generation system, equipped with the speed regulating differential mechanism (SRDM), is able to be friendly connected to power grid without the need of partly- or fully-rated converters. The novel alternative transmission schemes have good potential to address the problemsof hugh reactive power consumption, weak low voltage ride through ability as wll as unsatisfactoryoutput power quality and dynamic stability in the existing variable speed constant frequency grid-connected wind turbines (WTs). To further improve the operating performance of SDRM-based WT and eliminate the adverse effects caused by high-cost sensors, high-power speed regulating motor and control units, in this paper, a novel WT tramsmission equiped with a self-stabilizing SRDM is proposed. Taken the self-stabilizing SRDM-based WT as the research object, its kinematic principles and transmission characteristics are studied, after determining the structural configuration. A dedicated simulation model is estblished with SIMULINK software, by which the desired on-grid operating performances of the self-stabilizing SRDM-based WT are verified under the wind conditions of normal turbulent and extreme operating gust models.