风力发电系统建模及并网稳定性仿真研究

Modeling and Grid Stability Simulation of Wind Power Generation Systems

为探索风力发电系统并网时的稳定性特征,建立了相应的仿真模型,包括风速、风力机、机械传动3个关键通用模块,并在其基础上结合某风电场的实际情况,运用Simulink软件构建了双馈风机并网模型。分别在电压控制模式和无功功率控制下,以不同的风速开展并网稳定性模拟,得出了相应的技术特征。结果显示,风电机组的端电压、端电流、有功功率、无功功率、电机转速与风速的变化存在紧密的联系,各指标在波动后均可重新达到稳定状态。

In order to explore the stability characteristics of wind power generation systems when connected to the grid,a corresponding simulation model was established,including three key universal modules:Wind speed,wind turbine,and mechanical transmission.Based on this,a doubly fed wind turbine connected model was constructed using Simulink software in conjunction with the actual situation of a wind farm.Under voltage control mode and reactive power control,grid connection stability simulations were conducted at different wind speeds,and corresponding technical characteristics were obtained.The results show that the terminal voltage,terminal current,active power,reactive power,motor speed,and wind speed of wind turbines are closely related,and all indicators can reach a stable state again after fluctuations.