双馈异步电机矢量控制系统性能分析

On the Dynamic and Steady State Performances of Vector Controlled Doubly-fed Asynchronus Machine Drive

根据矢量控制理论和自动控制原理,建立了转子磁链定向的双馈异步电动机电流模型矢量控制系统。该系统使用了一种新的电流控制器,以改善电机转子电流波形。控制系统可以单独控制电机的转速和无功功率,使其工作在超同步、亚同步、转子电流量最小和全补偿工作方式下。理论分析和仿真结果表明,这种控制策略有较好的动态与静态调节性。

Based on the theory of vector control and automatic control system, the vector control system of current model for doubly-fed asynchronous machine with fieht-oriented rotor was established. A novel current regulator was used in the control system to improve the rotor current waveform. The machine can he operated in sub-synchronous, super-synchronous speeds, minimum rotor current and full compensation when adjusting the speed and reactive power independently. The theoretical analysis and simulation result show that this control strategy possess better dynamic and steady adjusting performance.