定频化VIENNA整流器模型预测电流控制

VIENNA整流器是一种高性能三相三电平整流器,不仅网侧性能优良,并且具有功率密度高、结构简单等特点。将模型预测控制引入了VIENNA整流器的电流控制当中,并针对传统模型预测控制计算复杂、开关频率不固定的缺点,提出了一种定频化的模型预测电流控制方法,通过优化价值函数、引入调制模块的方式固定开关频率,并实现网侧单位功率因数、输出直流电压稳定和输入电流正弦的目标。实验验证了所提方案的正确性。

Fixed-frequency Model Predictive Control for a VIENNA Rectifier

The VIENNA rectifier is a high-performance three-phase three-level rectifier which not only has excellent grid side performance,but also features high power density and simple circuit topology.The model predictive control was introduced into the current control of VIENNA rectifier.Aiming at the disadvantages of conventional model predictive control,such as complicated calculation and unfixed switching frequency,a fixed frequency model predictive current control method was proposed.The switching frequency was fixed by optimizing the cost function and using modulation module,and the goals of unit power factor,stable output DC voltage and sinusoidal input current was realized.The experiment verify the correctness of the proposed scheme.