基于MATLAB的双馈风电机组控制器的建模和仿真

Modeling and Simulation of Double-Fed Wind Turbine Controller Based on MATLAB

以双馈风力发电机组的控制器为研究对象,分析了发电机速度控制环节和无功控制环节的原理,在matlab/simulink中建立了相应的仿真模型,并对无功控制环节进行了详细的仿真,分析了无功功率变化时对网侧逆变器和发电机定子转子电流的影响,结果表明,在无功功率调节的过程中网侧变流器的电流的幅值和相位变化很小,当发出容性无功增加时,网侧电压会下降,定子侧电流会上升,其相位会变大,网侧变流器的电流变化不大。

The generator speed control system and the principle of reactive power control links is analyzed in doubly-fed wind turbine controller as the research object. The influence of the generator stator and rotor current as well the network side inverter current caused by the change of reactive power is analyzed based on the model established in the matlab/ simulink ; also, the detailed simulation of reactive power control link is given. Results show that in the process of reactive power regulation, the amplitude and phase change of the network side inverter current is very small. When the capacitive reactive power increase, the network voltage drops, the stator current will increase, its phase get bigger, network side in- verter current changed little.