新型PWM整流器预测直接功率控制研究

Research on Modified Predictive Direct Power Control of PWM Rectifier

介绍了预测直接功率控制原理以及电压矢量选择原则。传统的预测直接功率控制方法中,有功功率和无功功率均由同一个指标函数控制,所以当PWM整流器的一个控制量受到扰动,另一个控制量也会受到干扰,进而引起整流器变量间的相互干扰,导致PWM整流器动态性能和稳定性下降。提出一种新型的预测直接功率控制方法,即通过设置权衡因子来重新设置指标函数,以减少功率发生变化时,因控制量间的相互干扰对整流器造成的影响。通过Matlab/Simulink的仿真结果和多功能实验平台样机的实验结果证明,与传统的预测直接功率控制相比,本方法有更好的动态性能与鲁棒性。

Introduced predictive direct power control(PDPC)theory and principle to select voltage vector. Activepower and reactive variable quantities of traditional PDPC are controlled by the same cost function. So when onevariable quantity subject disturbance,the other variable quantities will subject disturbance too,that cause mutualinterference and result dynamic performance of PWM decrease. Proposed a novel PDPC which introduce weightingfactors of active power and reactive power to reset cost function,which can minimize interference and improve dynamicand stability. Simulation of Matlab/Simulink result and experiment result based on prototype shows,compared withconventional PDPC,proposed method can improve dynamic and stability performance of PWM rectifier.