风电机组等效模型对机组暂态稳定分析结果的影响

该文应用等效集中质量法，建立了同时考虑风力机叶片弯曲柔性以及风力机和发电机之间传动轴扭转柔性的风力机3个质量块等效模型。结合并网笼型异步发电机的电磁暂态模型，以额定功率330 kW(MADE-AE30)和3 MW的风力发电机组为例，在电网电压骤降和机械大扰动下，与风力机传统1个、2个质量块等效模型的机组暂态稳定性进行了

Effect of Equivalent Models of Wind Turbines on Analysis Results of Transient Stability for Wind Generator Systems

By using equivalent lump mass method, a three-mass wind turbine equivalent model is presented considering both the bending flexibility of blades and the torsional flexibility of the drive-train shaft between the wind turbine and induction generator. Combined with the electrical transient models of a grid-connected squirrel cage induction generator (SCIG), during a grid voltage drop and a mechanical large disturbance, the transient stability of two wind generator systems with rated power 330 kW (MADE-AE30) and 3 MW are investigated, respectively. Simulation results are also compared with those of the typical single-mass and two-mass equivalent models of wind turbines. The effects of the different bending flexibility of blades and the different position of blades breakpoint on the electrical transient stability of the rated power 3 MW wind turbine are also analyzed. The results show that the proposed equivalent model of wind turbine is essential and valid to analyze accurately the transient stability of wind turbine systems.