Control of Grid-Following Inverters Under Unbalanced Grid Conditions

• Published in: IEEE transactions on energy conversion Vol. 35; no. 1; pp. 184 - 192
• Main Authors: Zarei, Seyed Fariborz, Mokhtari, Hossein, Ghasemi, Mohammad Amin, Peyghami, Saeed, Davari, Pooya, Blaabjerg, Frede
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.03.2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Active control; Active filters; Asymmetrical short circuit faults; Capacitors; DC-link voltage control; grid-following inverters; Harmonic analysis; Harmonic distortion; instantaneous active reactive control; Inverters; output currents 3rd harmonics; Power harmonic filters; unbalanced grid conditions; Voltage control

This paper proposes a new control scheme to eliminate the 3rd harmonic in the output currents of grid-following inverters under unbalanced grid conditions. Unbalanced grids adversely affect the performance of grid-following inverters due to the oscillations appearing on the DC-link voltage with a fr...