大型变速双馈风电机组动态稳定性仿真分析

Simulation of Dynamic Stability of Large Capacity Variable Speed DFIG

介绍了变速双馈风力发电机组的基本结构,建立了双馈风电机组在dq坐标系下的动态数学模型。应用MAT-LAB/Simulink搭建了系统仿真模块,对大型双馈风力发电机组的动态稳定性做了仿真研究。仿真结果表明了所建模型的正确性,以及在风电系统中利用变速技术后可以大大提高风能的利用率,改善了电力系统稳定性,并说明了变速双馈风力发电机组具有具有良好的动态特性和低电压穿越功能,为今后大型风电场的建立提供了可靠的理论依据。

The paper presents the basic structure of variable speed doublefed induction generator（DFIG）.It also builds the dg coordinate system dynamic mathematic mode of variable speed DFIG,and builds the simulink by using MATLAB/simulink and conducts. The simulating study of dynamic stability of DFIG.The simulation results show that the established model is correct and it can capture as much wind energy as possible,may improve the stability of electric power system,and show that the variable speed DFIG possesses good dynamic characteristics and low voltage ridingthrou capabilities （LVRT）.It lays theoretical foundation for building large wind power farm in the future.