This paper proposes a model predictive control (MPC) algorithm designed for nine-switch converter with output filter (NSCOF) to control two three-phase AC loads independently. A state function of each leg of nine-switch converter (NSC) is established to characterize the internal conditions of the NSC because the traditional model of the NSCOF does not involve the interior model of the NSC. Based on the NSCOF model with the state function of each leg, a prediction model of NSCOF is constructed. The two AC terminals of NSCOF are treated as one module when the MPC is designed. The proposed MPC achieves controlling two three-phase AC loads working under different frequency modes. Furthermore, this algorithm is independent of the modulation method for reducing the difficulty of the controller design and its limits. The simulation and experimental results reveal that the steady-state and dynamic response performance of NSCOF are substantially improved using MPC.

中文翻译：

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两个负载独立控制的带输出滤波器的九开关变换器模型预测控制

本文提出了一种模型预测控制（MPC）算法，该算法专为带输出滤波器的九开关转换器（NSCOF）而设计，以独立控制两个三相交流负载。由于传统的 NSCOF 模型不涉及 NSC 的内部模型，因此建立了九开关转换器 (NSC) 每条腿的状态函数来表征 NSC 的内部条件。基于具有每条腿状态函数的NSCOF模型，构建了NSCOF的预测模型。NSCOF 的两个 AC 端子在 MPC 设计时被视为一个模块。所提出的 MPC 实现了控制在不同频率模式下工作的两个三相交流负载。此外，该算法与调制方法无关，以降低控制器设计的难度及其限制。