摘要：三相PWM整流器在新能源發電并網、電機變頻控制等領域得到了廣泛的應用。本文研究了三相PWM整流器基于模型預測的直接功率控制算法(MPC-DPC)。MPC-DPC在每個采樣周期內，通過電網電壓矢量選擇有效作用矢量，為實現定頻控制和減小開關損耗，結合零矢量采用3+3的矢量序列，并以減小有功功率和無功功率偏差為目標，計算出每個矢量的最優作用時間。對MPC-DPC算法進行了仿真研究，結果表明，MPC-DPC具有良好的動靜態性能。 敘詞：PWM整流器/模型預測控制/直接功率控制/有功功率/無功功率 Abstract： Three-phase PWM rectifier is widely used in the fields of new energy paralleling operation and motor control technology. This paper mainly studies the direct power control algorithm of three-phase PWM rectifier based on model predictive control (MPC-DPC). During every sampling period, effective interaction vector is selected through the voltage vector and vector sequence of 3+3 is used to realize constant frequency control and to reduce switching loss combined with zero vector, and thus MPC-DPC figures out the best acting time of every vector, aiming to reduce the deviation of active power and reactive power. The result shows MPC-DPC has excellent dynamic and static performance with the simulation study of MPC-DPC. Keyword：PWM rectifier, Model predictive control, Direct power control, Active power, Reactive power