中文摘要：

提出一种基于瞬时功率理论的模型预测直接功率控制（DPC）策略，建立功率预测模型，分析了双馈式异步发电机（DFIG）转子侧变换器电压矢量对定子输出有功、无功功率变化影响。构造瞬时功率误差价值函数，以满足价值函数最小为目标计算下一时刻功率指令。利用功率预测模型和价值函数最小原则得出目标控制电压矢量，结合空间矢量脉宽调制（SVPWM）实现模型预测功率控制，同时将延时补偿引入功率预测模型中，减少谐波含量同时获得固定开关频率，具有良好的稳态性。仿真及实验结果表明了所提控制策略的可行性和有效性。

英文摘要：

A model predictive direct power control （DPC） is presented for doubly-fed induction motor（DFIG）.This paper sets power prediction model, analyzes DFIG rotor side converter output vohage vector of stator active and reactive power changes, constructs the instantaneous power error value function to meet the minimum of value function for cal- culation of the next power instruction, in the proposed control strategy the voltage vector in power supply system is taken as the basic control vector and utilizing power directive model and minimum power error principle,the formula of objective control voltage vector is obtained, then combining space vector pulse width modulation （SVPWM）, the model predictive direct power control is implemented.Considering step delay in actual control systems a delay compensation scheme is designed.Simulation and experiment show that the strategy has much better steady-state.