Model predictive DC‑component power control for grid‑connected inverters under unbalanced network

Bihua Hu; Zhiyong Chen; Zhi Zhang; Wenlang Deng; Dongdong Zhao

Model predictive DC‑component power control for grid‑connected inverters under unbalanced network

Vol. 21, No. 1, pp. 235-246, Jan. 2021

10.1007/s43236-020-00176-7

C-component powers

Grid current distortion

Model predictive power control (MPPC)

Unbalanced network

Abstract

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.

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Cite this article

[IEEE Style]

B. Hu, Z. Chen, Z. Zhang, W. Deng, D. Zhao, "Model predictive DC‑component power control for grid‑connected inverters under unbalanced network," Journal of Power Electronics, vol. 21, no. 1, pp. 235-246, 2021. DOI: 10.1007/s43236-020-00176-7.

[ACM Style]

Bihua Hu, Zhiyong Chen, Zhi Zhang, Wenlang Deng, and Dongdong Zhao. 2021. Model predictive DC‑component power control for grid‑connected inverters under unbalanced network. Journal of Power Electronics, 21, 1, (2021), 235-246. DOI: 10.1007/s43236-020-00176-7.