Conventional switching table-based direct power control (DPC) usually suffers from higher power ripples due to the heuristic nature of the switching table. This study presents a novel model predictive DPC (MPDPC) strategy for grid-connected three-level inverters. In the proposed MPDPC strategy, a new synchronous frame-based predictive model is first developed and the conjugate of the complex power is then chosen as the control variable to simplify the analysis. Based on the newly developed predictive model, new principles of the voltage vector selection are further derived with the strict analytical proof to match all the control requirements, including the active and reactive power control, neutral point potential balance control, as well as the avoidance of the high voltage jumps. Finally, experimental results are provided to support the theoretical study and confirm the effectiveness of the proposed MPDPC strategy, as well as to demonstrate better performance in both steady-state and dynamic responses over the conventional DPC.

中文翻译：

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并网三电平逆变器的新型模型预测直接功率控制策略

常规的基于切换表的直接功率控制（DPC）通常由于切换表的启发式特性而遭受较高的电源纹波。这项研究提出了一种新颖的模型预测DPC（MPDPC）策略，用于并网三电平逆变器。在提出的MPDPC策略中，首先开发了一个新的基于同步帧的预测模型，然后选择复数功率的共轭作为控制变量以简化分析。在新开发的预测模型的基础上，通过严格的分析证明进一步推导了电压矢量选择的新原理，以匹配所有控制要求，包括有功和无功功率控制，中性点电势平衡控制以及避免高压跳。最后，