摘要
为提高风力发电系统中双馈电机控制效果,需对电机的有功和无功分量分别进行控制,并进行前馈解耦控制。本文以矢量控制理论为基础,采用AC/DC/AC的拓扑结构,构建了双馈电机控制用双三电平变频器。逆变部分采用简化三电平SVPwM算法,通过动态改变开关次序和调整小矢量作用时间实现对中点电位的有效控制。双馈系统采用双闭环控制结构,保证电机的快速响应,该方法在电机负载转矩突变时动稳态性能较好,通过MATLAB仿真及DSP试验验证了此方法对双馈风力发电控制的有效性与可行性。
In order to improve the effect of doubly-fed motor control of wind power system, the active components and the reactive components of the motor should be controlled respectively,as well as the feed forward decoupling control.In this paper,by adopting AC/ DC / AC topology,the double three-level inverter for doubly-fed induction generator(DFIG) has been established based on vector control theory.Inverter part adopted simplified three-level SVPWM algorithm,by dynamically changing the switch and adjusting the order of the role of small-time vector to achieve effective control of the midpoint.Doubly-fed system used a double loop control structure,to ensure the rapid response of the motor,the method of mutation in the motor load torque dynamic steady state performance is quite good,the MATLAB simulation and DSP experimental results verify the effectiveness and feasibility of wind power generation control.of the novel current controller at low switching frequency.
出处
《变频器世界》
2011年第11期52-55,共4页
The World of Inverters
