三相PWM整流器模型預(yù)測(cè)的直接功率控制研究

摘要：三相PWM整流器在新能源發(fā)電并網(wǎng)、電機(jī)變頻控制等領(lǐng)域得到了廣泛的應(yīng)用。本文研究了三相PWM整流器基于模型預(yù)測(cè)的直接功率控制算法(MPC-DPC)。MPC-DPC在每個(gè)采樣周期內(nèi)，通過(guò)電網(wǎng)電壓矢量選擇有效作用矢量，為實(shí)現(xiàn)定頻控制和減小開(kāi)關(guān)損耗，結(jié)合零矢量采用3+3的矢量序列，并以減小有功功率和無(wú)功功率偏差為目標(biāo)，計(jì)算出每個(gè)矢量的最優(yōu)作用時(shí)間。對(duì)MPC-DPC算法進(jìn)行了仿真研究，結(jié)果表明，MPC-DPC具有良好的動(dòng)靜態(tài)性能。 敘詞：PWM整流器/模型預(yù)測(cè)控制/直接功率控制/有功功率/無(wú)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