摘要
传统的双馈风力发电机组(DFIG)采用矢量控制方法,但其比较依赖电机参数,一旦参数有所变化,将会影响系统控制效果。提出了一种基于逆系统的控制方法,通过逆系统理论,构造其状态方程,得到逆系统控制结构,最后建立双馈风力发电闭环控制系统。通过计算机仿真对所提出的方法进行了验证。仿真结果表明,该控制系统在变速恒频运行和发生电压跌落时,能够控制母线电压稳定,保持单位功率因数,实现有功和无功功率的解耦。证明了该控制方法用在变速恒频风力发电系统中具有较好的控制效果。
The traditional doubly-fed wind generation uses a vector control method,but it is more dependent on motor parameters,and once the parameters changes,the effect of the system control would be affected.This paper proposed a control method based on inverse system,through the inverse system theory,in which with the structure of its state equation was set up,the structure of the inverse system was obtained,and the wind power generation closed-loop control system was established at last.Simulations were proceeded to verify the controller performance.When the system operates in VSCF and the phase voltage drops,simulation results show that the control system can control the DC link voltage stably,maintain unit power factor,and achieve the decoupling of active and reactive power.It proves that this control method used in variable speed constant frequency wind power has a good performance.
出处
《微特电机》
北大核心
2011年第3期59-61,65,共4页
Small & Special Electrical Machines
基金
江苏省级重点实验室开放课题资助(K08017)
