Jin-Sung Lee, Sang-Hyeon Lee, In-Ho Lee, Sung-Nam Ju, and Kyo-Beum Lee, "Harmonic Compensated Individual-phase Control of Four-leg Inverters for Microgrid Applications," Journal of Power Electronics, vol. 23, no. 9, pp. 1756-1766, Nov. 2023. -SCIE > Paper

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Paper

International Journals Jin-Sung Lee, Sang-Hyeon Lee, In-Ho Lee, Sung-Nam Ju, and Kyo-Beum Lee, "Harmonic Compensated Individual-phase Control of Four-leg Inverters for Microgrid Applications," Journal of Power Electronics, vol. 23, no. 9, pp. 1756-1766, Nov. 2023. -SCIE

2023

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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 proportional-integral 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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