大型双馈式变速恒频发电机组对电网影响仿真分析

Simulation of influence of large double-fed variable speed wind turbine into grid

建立了基于电机矢量控制原理的双馈式变速恒频风力发电机组的动态数学模型,在Matlab/Simulink环境搭建了系统仿真模型,对大型双馈式变速恒频风力发电机组并网后对电力网络的影响进行了仿真分析。仿真结果表明并网运行的双馈式变速恒频发电机组动态性能良好,变速平稳,能够有效控制机端电压,对电网故障恢复起到一定的作用。

Applying Vector control principle of induction motor, a dynamic model for double-fed variable speed wind turbine （VSWT） is presented. Based on the models, by using of Matlab/Simulink tools to simulate the whole system, this paper reveals VSWT＇s influence to the power system. The results show VSWT has good running characteristics. The speed of VSWT is adjusted smoothly. The VSWT can also maintain the voltage and act on the fault restore of the power system to a certain extent.