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首页> 外文期刊>IEEE Transactions on Industrial Electronics >An Improved Model Predictive Control Scheme for the PWM Rectifier-Inverter System Based on Power-Balancing Mechanism
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An Improved Model Predictive Control Scheme for the PWM Rectifier-Inverter System Based on Power-Balancing Mechanism

机译:基于功率平衡机制的PWM整流-逆变系统改进模型预测控制方案

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摘要

The dc-link voltage fluctuation caused by the change of working state of the load motor has been one of the key issues in the pulse width modulation rectifier–inverter system. In this study, an improved model predictive control (MPC) scheme is proposed to address this problem. The MPC is applied to both the rectifier stage and the inverter stage in the system. Direct power control is used in the rectifier stage and the direct torque control is employed in the inverter stage, with the key novelty of the active power reference values being defined by both real-time and periodic compensation power based on the system-level power-balance model. Meanwhile, an MPC algorithm based on a two-step prediction is introduced to compensate for the delay of a digital controller. Comparison has been conducted between the proposed scheme and three other methods. Simulation and experimental results show that the proposed control scheme exhibits good performance in both the rectifier stage and the inverter stage with improved dynamic response and suppressed voltage fluctuation of the dc-link voltage.
机译:负载电动机工作状态的变化引起的直流母线电压波动一直是脉宽调制整流器-逆变器系统的关键问题之一。在这项研究中,提出了一种改进的模型预测控制(MPC)方案来解决此问题。 MPC适用于系统中的整流器级和逆变器级。整流器级使用直接功率控制,逆变器级使用直接转矩控制,有功功率参考值的关键新颖之处是根据系统级功率,通过实时和周期性补偿功率来定义。平衡模型。同时,引入了基于两步预测的MPC算法来补偿数字控制器的延迟。已对拟议方案与其他三种方法进行了比较。仿真和实验结果表明,所提出的控制方案在整流器级和逆变器级均表现出良好的性能,并改善了动态响应,并抑制了直流母线电压的电压波动。

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