This article presents an energy regulator based on a Model Predictive Control (MPC) algorithm for a Voltage Source Converter (VSC). The MPC is formulated to optimise the converter performance according to the weights defined in an objective function that trades off additional features, such as current harmonic distortion, reactive power tracking and DC bus voltage oscillation. Differently from most approaches found in the research literature, the MPC proposed here considers the coupling dynamics between the AC and DC sides of the VSC. This study is focused on the example case of a single-phase VSC, which presents a nonlinear relationship between its AC and DC sides and a sustained double-line frequency power disturbance in its DC bus. To reduce the burden of the MPC, the controller is formulated to benefit from the slow energy dynamics of the system. Thus, the cascaded structure typically used in the control of VSCs is kept and the MPC is set as an energy regulator at a reduced sampling frequency while the current control relies on a fast inner controller. The computational burden of the algorithm is further reduced by using a linear time-varying approximation. The controller is presented in detail and experimental validation showing the performance of the algorithm is provided.

中文翻译：

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并网VSCs的线性时变模型预测控制能量调节器设计。

本文提出了一种基于稳压器（VSC）的模型预测控制（MPC）算法的能量调节器。根据目标函数中定义的权重制定MPC，以优化转换器性能，该目标函数需要权衡其他功能，例如电流谐波失真，无功功率跟踪和DC总线电压振荡。与研究文献中发现的大多数方法不同，此处提出的MPC考虑了VSC的AC和DC端之间的耦合动力学。这项研究集中在单相VSC的示例案例上，该案例展示了其AC和DC端之间的非线性关系以及DC总线中持续的双线频率功率干扰。为了减轻MPC的负担，该控制器经过精心设计，可从系统缓慢的能源动力学中受益。因此，保留了通常用于VSC控制的级联结构，将MPC设置为降低的采样频率的能量调节器，而电流控制则依赖于快速内部控制器。通过使用线性时变近似，进一步减少了算法的计算负担。详细介绍了控制器，并提供了表明算法性能的实验验证。