基于PSCAD的变速恒频双馈风力发电机组并网稳定性仿真研究

PSCAD Based Simulation Study on Grid Integration of Variable-speed Doubly-fed Wind Turbine Generators

简要介绍了变速恒频双馈风力发电机组的工作原理,通过建立变速恒频发电机在dq坐标系下的数学模型,以及基于PSCAD的系统仿真模块,对变速双馈风力发电机组和恒速鼠笼型风力发电机组的并网稳定性进行仿真分析与比较。结果表明,变速恒频双馈风力发电机组具备更好的小干扰稳定性和暂态稳定性,同时,可以在风速发生变化时通过进行变桨或变速运行调节功率,实现最大风能捕获。

The paper presents the principle of variable-speed constant frequency （VSCF）wind power system. It also builds the d-q coordinate system mathematic model of VSCF generation system, builds the simulation model by PSCAD and analyses the stability of connection to power system between double-fed wind genera wind power generator. The simulation results show that VSCF stability in interferential and transient situations and it also can tor and constant-speed cage generators possesses better doubly-fed wind turbine trace maximum wind energy in variable -speed mode when the wind speed varies.