Offset voltage injection method for neutral‑point AC voltage ripple suppression in Vienna rectifiers

Young-Min Go; June-Seok Lee

Offset voltage injection method for neutral‑point AC voltage ripple suppression in Vienna rectifiers

Young-Min Go

June-Seok Lee

Vol. 23, No. 9, pp. 1400-1410, Sep. 2023

10.1007/s43236-023-00657-5

Carrier-based pulse width modulation

Neutral-point voltage control

Vienna rectifier

Three-level inverter

Abstract

This paper proposes an offset voltage injection method to compensate for AC voltage ripple at the neutral-point of a Vienna rectifier. The proposed method leads to sinusoidal input currents and has a suppression effect on the AC voltage ripple at the neutral-point by injecting three offset voltages to remove both the zero current distortion and voltage unbalance (both DC voltage and AC voltage ripple) at the neutral-point. This can result in an improvement in the Total Harmonic Distortion (THD) of the input current. The offset voltage to realize the suppressing of the AC voltage ripple is defined based on a neutral-point voltage equivalence model of a Vienna rectifier. The priority of the offset voltages is considered to avoid over-modulation. In addition, incompatibility between offset voltages is analyzed to guarantee sinusoidal input currents. By considering both of these characteristics, the proposed method injects the offset voltages in order from the higher priority to the lower priority. The performance and effectiveness of the proposed method are verified with simulation and experimental results.

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Cite this article

[IEEE Style]

Y. Go and J. Lee, "Offset voltage injection method for neutral‑point AC voltage ripple suppression in Vienna rectifiers," Journal of Power Electronics, vol. 23, no. 9, pp. 1400-1410, 2023. DOI: 10.1007/s43236-023-00657-5.

[ACM Style]

Young-Min Go and June-Seok Lee. 2023. Offset voltage injection method for neutral‑point AC voltage ripple suppression in Vienna rectifiers. Journal of Power Electronics, 23, 9, (2023), 1400-1410. DOI: 10.1007/s43236-023-00657-5.