双馈风力发电机组及其低电压穿越技术

The Wind Turbines Doubly-fed Generators Set and Its Low Voltage Ride-through Technology

从双馈电机的基本工作原理出发,建立了双馈发电机的数学模型,并对其在风速发生变化时进行仿真。研究了双馈风电机组在电网故障时的运行情况,通过硬件方法使双馈风电机组具有更强的低电压穿越能力。也就是在电网出现短暂故障时,风电机组还能保持并网运行。

Starting from the basic working principle of the double-fed generator,mathematic model of the double-fed generator was established,and then,simulation was conducted when the wind speed changing.The status of the double-fed generator set operating under the condition that power grid failure occurred was studied,the stronger ability of the low-voltage ride-through was gained by means of the hardware method.That is,the double-fed generator in the wind turbine was able to maintain its parallel operation with the network in the case of temporary failure of the power grid.