大规模风力发电并网对系统小干扰稳定性的影响

Affect on Small Interfering Stability of System by Large-scale Wind Power Grid-connected

以西北电网酒泉风电系统为算例,分析了不同风电机组类型、不同风电容量、不同并网位置对电力系统小干扰稳定性的影响。仿真结果表明:相比于恒速风力机模型和直驱式同步发电机模型,风电场采用双馈异步发电机模型并网对系统小干扰稳定性的影响较好;随着双馈并网有功出力的增加,系统小干扰稳定性减弱;选择合适的风电场位置可以为系统提供较好的阻尼。

Taking Jiuquan wind power system of Northwest power grid as an example,this paper analyzes impact on small in-terfering stability of the power system by different wind turbine generators,wind power capacities and grid-connected posi-tions. Simulation results indicated that compared with constant speed wind turbine model and direct drive synchronous gener-ator model,impact on small interfering stability of the system by DFIG grid-connected was better. With increase of active power output of DFIG grid-connected,small interfering stability was weakening. It was able to provide better damping for the system by choosing suitable wind power plants.