Under an unbalanced network, model predictive control (MPPC) with a new definition of the instantaneous reactive power has attracted a great deal of attention due to its simple control structure and outstanding steady-state performance. However, the reactive power cannot precisely trace the nonzero reference. In this paper, a model predictive DC-component power control (MPDCPC) is proposed to tackle the above-mentioned problem. Additionally, the MPDCPC can eliminate oscillations on the reactive power and the negative-sequence current. Then, the corresponding mathematical formulas are derived to extract the DC-component powers, to calculate the DC-component power derivative and to modify the power reference. By regulating the DC-component power to trace the modified reference, the MPDCPC can reduce the current harmonic and remove the oscillations on the active power, reactive power or negative-sequence current. Simulation and experimental platforms are established to demonstrate the validity of MPDCPC. Results demonstrate that the MPDCPC can effectively suppress current distortion and remove oscillations on active power, reactive power or negative-sequence current. In addition, the MPDCPC can successfully break through the restrictions of the MPPC with a new definition of instantaneous reactive power.

中文翻译：

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不平衡网络下并网逆变器的模型预测直流分量功率控制

在不平衡网络下，对瞬时无功功率进行新定义的模型预测控制（MPPC）因其简单的控制结构和出色的稳态性能而备受关注。但是，无功功率无法精确跟踪非零参考。在本文中，提出了一种模型预测直流分量功率控制（MPDCPC）来解决上述问题。此外，MPDCPC 可以消除无功功率和负序电流的振荡。然后，推导出相应的数学公式来提取直流分量功率，计算直流分量功率导数并修改功率参考。通过调节直流分量功率来跟踪修改后的参考，MPDCPC 可以降低电流谐波，消除有功功率、无功功率或负序电流的振荡。建立仿真和实验平台来证明MPDCPC的有效性。结果表明，MPDCPC 可以有效抑制电流失真，消除有功功率、无功功率或负序电流的振荡。此外，MPDCPC 以全新的瞬时无功定义，成功突破了 MPPC 的限制。