Under unbalanced grid conditions, the DC side voltage of pulse width modulation (PWM) rectifier will overshoot during start-up and reference voltage transients, which may lead to system instability. In this paper, a deadbeat predictive power control (DPPC) with fuzzy PI compound controller (FPCC) and power predictive corrector (PPC) is proposed to solve that problem. Firstly, the parameters of the PI controller are adjusted online by the fuzzy control rule of the FPCC to eliminate the overshoot of the DC side voltage and contribute to faster dynamic responses, which thereby could correct the reference active power. Secondly, the static error between the reference and system active powers is reduced by accumulative predictive errors in the PPC. The simulation is carried out under ideal and unbalanced grid conditions. The result shows that the proposed control scheme can effectively eliminate the overshoot of DC voltage, reduce the static error of active power, and improve the dynamic response and anti-interference ability of the rectifier.

中文翻译：

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电网不平衡情况下用模糊PI复合控制器和PWM整流器的功率预测校正器进行无差拍预测功率控制

在电网不平衡的情况下，脉宽调制（PWM）整流器的直流侧电压会在启动和参考电压瞬变期间过冲，这可能会导致系统不稳定。为了解决该问题，本文提出了一种基于模糊PI复合控制器（FPCC）和功率预测校正器（PPC）的无差拍预测功率控制（DPPC）。首先，通过FPCC的模糊控制规则在线调整PI控制器的参数，以消除DC侧电压的过冲并有助于更快的动态响应，从而可以校正参考有功功率。其次，通过PPC中的累积预测误差，可以减小参考功率与系统有功功率之间的静态误差。该模拟是在理想且不平衡的电网条件下进行的。