变速恒频风力发电系统并网控制及仿真

Grid-connected Control and Simulation of Variable Speed Constant Frequency Wind Power Generation System

双馈感应发电机将电力电子器件运用于变速恒频风力发电系统中,不但有效增加了风机能量转换率,此外还进一步显著降低了涡轮机械损耗。建立了采用变速恒频方式完成风力发电系统并网控制的模型,通过模型的仿真运行,得到风速变化下不同控制模式的风机侧、电网侧波形。仿真结果表明,无功功率控制模式下的并网效果更好。改变负载,初步探究了负载对并网的影响。

Doubly-fed induction generators use power electronic devices in variable speed constant frequency wind power generation system, which not only effectively increase the energy conversion rate of the wind turbine, but also significantly reduce the mechanical loss of the turbine. A model for implementing the grid-connected control of the wind power generation system by using the variable speed constant frequency method is established. Through the simulation operation of the model, the wind turbine side and grid side waveforms of different control modes under the wind speed change are obtained. The simulation results show that the grid connection effect is better in reactive power control mode. It changes the load and initially explores the impact of the load on the grid.