三相PWM整流器模型预测的直接功率控制研究

Model Predictive Direct Power Control Research on Three-phase PWM Rectifier

三相PWM整流器在新能源发电并网、电机变频控制等领域得到了广泛的应用。本文研究了三相PWM整流器基于模型预测的直接功率控制算法(MPC-DPC)。MPC-DPC在每个采样周期内,通过电网电压矢量选择有效作用矢量,为实现定频控制和减小开关损耗,结合零矢量采用3+3的矢量序列,并以减小有功功率和无功功率偏差为目标,计算出每个矢量的最优作用时间。对MPC-DPC算法进行了仿真研究,结果表明,MPC-DPC具有良好的动静态性能。

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.