A predictive power control for a four-switch three-phase (FSTP) grid-side converter (GSC) of doubly fed induction generators (DFIG) is presented in this paper. In this new method, three voltage vectors are employed to ensure that the proposed strategy maintains the switching frequency constant while the ripple of the active and reactive powers of the GSC is minimized. Moreover, a compensation power to eliminate the dc voltage deviation in the capacitors is presented, and it can be estimated without using any low-pass filter. The proposed method can be implemented in a microcontroller very easily. First, the proposed strategy has been evaluated in MATLAB/Simulink environment and afterward it was implemented in a laboratory prototype. The simulation and experimental results of the proposed predictive strategy show that it is capable to suppress the dc-link voltage offset, featuring balanced currents and a fast dynamic response while the GSC current total harmonic distortion is low. Furthermore, the performance of the proposed method is compared to two other predictive controls. The results prove that the proposed method is well suitable for the FSTP GSC of a DFIG.

中文翻译：

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双馈感应发电机网侧变流器四开关三相运行三向量预测直接功率控制策略


本文提出了双馈感应发电机 (DFIG) 的四开关三相 (FSTP) 网侧变流器 (GSC) 的预测功率控制。在这种新方法中，采用三个电压矢量来确保所提出的策略保持开关频率恒定，同时最小化 GSC 有功功率和无功功率的纹波。此外，还提出了一种补偿功率来消除电容器中的直流电压偏差，并且可以在不使用任何低通滤波器的情况下进行估计。所提出的方法可以非常容易地在微控制器中实现。首先，所提出的策略在 MATLAB/Simulink 环境中进行了评估，然后在实验室原型中实施。所提出的预测策略的仿真和实验结果表明，该策略能够抑制直流母线电压偏移，具有电流平衡和快速动态响应的特点，同时GSC电流总谐波失真较低。此外，还将所提出方法的性能与其他两种预测控制进行了比较。结果表明，该方法非常适合双馈发电机的FSTP GSC。