Harmonic compensated individual‐phase control of four‐leg inverters for microgrid applications

Jin-Sung Lee; Sang-Hyeon Lee; In-Ho Lee; Sung-Nam Ju; Kyo-Beum Lee

Harmonic compensated individual‐phase control of four‐leg inverters for microgrid applications

Vol. 23, No. 11, pp. 1756-1766, Nov. 2023

10.1007/s43236-023-00699-9

Abstract

In this paper, harmonic compensated individual-phase voltage control of four-leg inverters is proposed for microgrid applications. Individual-phase control, which is one of the promising voltage control methods of four-leg inverters, ensures robustness for high load unbalance rates. However, the odd harmonics generated by nonlinear loads and dead time deteriorate the quality of load voltages under single-phase control. The proposed method compensates for the odd harmonics included in the load voltages to improve the output power quality. In the proposed method, band-pass and all-pass filters are used to generate the virtual components for the individual-phase control. Additionally, the harmonics are compensated in the synchronous reference frame using a resonant controller, while the fundamental components are controlled by proportionalintegral controllers. With the proposed method, the total harmonic distortion of the load voltages is maintained at a low level under unbalanced and nonlinear load conditions. The effectiveness of the proposed method is demonstrated through simulation and experimental results.

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Cite this article

[IEEE Style]

J. Lee, S. Lee, I. Lee, S. Ju, K. Lee, "Harmonic compensated individual‐phase control of four‐leg inverters for microgrid applications," Journal of Power Electronics, vol. 23, no. 11, pp. 1756-1766, 2023. DOI: 10.1007/s43236-023-00699-9.

[ACM Style]

Jin-Sung Lee, Sang-Hyeon Lee, In-Ho Lee, Sung-Nam Ju, and Kyo-Beum Lee. 2023. Harmonic compensated individual‐phase control of four‐leg inverters for microgrid applications. Journal of Power Electronics, 23, 11, (2023), 1756-1766. DOI: 10.1007/s43236-023-00699-9.