This article presents the implementation and performance evaluation of a model predictive control (MPC) for three-phase (3Ψ) transformerless interconnected five-level power electronic converters (PECs). The proposed MPC employs a discrete-time model of five-level PECs to predict future values of the grid-injected currents and ground potential. Predicted values of the grid-injected currents and ground potential are used to set the reference signals to minimize a cost function, which is formulated in terms of the command and actual values of grid-injected current and ground potential. The proposed MPC is implemented for transformerless interconnected diode-clamped and flying-capacitor five-level PECs under different conditions. Test results show that the developed MPC can operate transformerless interconnected PECs to ensure accurate, dynamic, and fast responses to changes in the power delivered to the host grid. Furthermore, the MPC demonstrates a good ability to minimize ground potentials during steady state and step changes in the power delivered to the host grid.

中文翻译：

---

开发和测试模型预测控制，以最小化无变压器互连五电平电力电子转换器中的接地电位


本文介绍了三相 (3Ψ) 无变压器互连五电平电力电子转换器 (PEC) 的模型预测控制 (MPC) 的实现和性能评估。所提出的 MPC 采用五级 PEC 的离散时间模型来预测电网注入电流和接地电位的未来值。电网注入电流和接地电位的预测值用于设置参考信号以最小化成本函数，该成本函数根据电网注入电流和接地电位的命令值和实际值来制定。所提出的 MPC 在不同条件下针对无变压器互连二极管钳位和飞跨电容器五电平 PEC 实施。测试结果表明，所开发的 MPC 可以运行无变压器互连 PEC，以确保对输送到主电网的电力变化做出准确、动态和快速的响应。此外，MPC 表现出良好的能力，可以在稳态和向主电网供电的阶跃变化期间最大限度地降低地电位。