基于双矢量模型预测功率控制的Vienna整流器设计

Vienna Rectifier Design Based on Predictive Power Control of Dual Vector Model

传统有限集模型预测功率控制对Vienna整流器在控制周期中只输出单个作用矢量,功率波动大,输入电流谐波畸变率高,为此提出一种应用于Vienna整流器的双矢量有限集模型预测功率控制策略。该策略在控制周期中引入第二矢量与最优矢量共同作用,通过分配最优矢量和第二矢量的作用时间提高对功率的跟踪精度。建立仿真模型并设计Vienna整流器实验平台,仿真和实验结果表明,与传统的有限集模型预测控制相比,所提控制策略能够有效地减小参考功率和预测功率之间的误差,降低Vienna整流器的功率波动和输入电流的总谐波畸变率。

Aiming at the problem that the traditional finite set model predictive power control of Vienna rectifier only outputs a single action vector in a control cycle,the power fluctuation is large,and the harmonic distortion rate of the input current is high,a dual-vector finite set model predictive power control strategy is proposed for the Vienna rectifier.This strategy introduces the second vector and the optimal vector to work together in a control cycle.It can improve the power tracking accuracy by allocating the action time of the optimal vector and the second vector.We establish simulation model and design Vienna rectifier experimental platform.Simulation and experimental results show that the proposed control strategy can effectively reduce the error between the reference power and the predicted power,decrease the power fluctuation and the total harmonic distortion rate of the input current of the Vienna rectifier compared with the traditional finite set model predictive control.