【摘要】 为了解决传统的基于dq变换的电流内环控制器应用在三相电压型PWM整流器时,动态响应慢及直流电压波动较大的问题,提出了一种电流预测的控制策略。本文首先建立了三相电压型PWM整流器的离散化数学模型,并在此基础上推导出电流预测控制方程。其次,设计了系统电流内环、电压外环的双闭环控制器,搭建了三相电压型PWM整流器Matlab/Simulink仿真模型。最后,实验验证了所提电流预测控制在稳定直流电压、控制交流电流等方面具有良好的稳态和动态特性。该控制方法简单、易于实现,具有一定的实用价值。更多还原

【Abstract】 A predictive current control strategy is proposed to solve the problems of slow dynamic response and DC voltage fluctuation for traditional current inner loop controller based on dq transformation applications in three-phase PWM voltage source rectifier(VSR). Firstly, the discrete mathematical model of VSR is established and predictive current control equations are derived. Secondly, a dual closed-loop controller with current inner loop and voltage outer loop is designed for the system. Then, the Matlab/Simulink simulation platform of three-phase PWM voltage source rectifier is set up to verify the theoretical analysis results. Finally, the experimental results show that predictive current control method has good steady-state and dynamic performance in stabilizing DC voltage and controlling the AC current. This control method is simple, easy to implement, and has certain practical value.更多还原