兆瓦级双馈型风电场并网的系统暂态稳定性研究

Study on Transient Stability of the Grid with a MW Wind Plant Based on DFIG

研究了基于双馈感应电机的风电场并网后的系统暂态过程。首先建立了双馈风电机组的动态模型,以及水轮发电机组、电力系统稳定器、静止无功补偿器的数学模型,然后仿真研究了风电场并网以后对区域系统暂态过程的影响,对比分析了故障情况下不同的系统稳定措施的作用和效果,仿真计算结果验证了建立模型和采取方法的正确性和有效性。仿真结果表明:1.双馈风电场并网后会对系统原有发电机组的暂态稳定性产生影响,导致系统的振荡;2.速度PSS在某种程度上具有比功率PSS更好的增强系统稳定的能力。

Transient process of a wind farm integration on power system is studied in this paper. In the process of analyzing, the dynamic models of wind turbines based on doubly-fed induction generator, and the mathematical models of hydraulic turbine, power system stabilizer, and static var compensator is established. Through the simulink research, transient process of regional system is studied. Under the system fault situations, different effects of stabilization measures are analyzed comparatively and the simulation results verify the models and methods are correct and effective. Finally, simulation results show that：First, the wind farm integration based on DFIG into the power system affects transient stability of the original system, and results in system oscillations, and Second, the Multi-Band PSS haves better capability to enhance the system dynamic stability than the Generic PSS.