Unified Control of Three-Level PFC Rectifiers in 3-Wire and 4-Wire Configurations

Natan Schechter; Dmitry Baimel; Alon Kuperman

doi:10.1109/TPWRD.2023.3325919

Unified Control of Three-Level PFC Rectifiers in 3-Wire and 4-Wire Configurations

Natan Schechter, Dmitry Baimel, Alon Kuperman

School of Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

This article presents a comprehensive analysis of neutral wire disconnection event in active three-phase three-level neutral-point-clamped (NPC) power factor correction (PFC) rectifier operating as front-end of uninterruptible power supply (UPS). It is revealed that upon four-wire to three-wire configuration transition, partial DC link voltages control loops become positive-feedback, yielding operational stability loss. Consequently, it is proposed to reverse partial DC link voltage loop gain polarities (e.g., by swapping the feedback signals) upon the above-mentioned event detection. As a result, partial DC link voltage loops retain negative feedback and stable operation of the system is preserved. The proposed approach was verified experimentally on an off-the-shelf 25 kVA commercial UPS system.

Original language	English
Pages (from-to)	613-621
Number of pages	9
Journal	IEEE Transactions on Power Delivery
Volume	39
Issue number	1
DOIs	https://doi.org/10.1109/TPWRD.2023.3325919
State	Published - 1 Feb 2024

Keywords

Active rectifier
power factor correction
three-level converter

ASJC Scopus subject areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1109/TPWRD.2023.3325919

Cite this

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title = "Unified Control of Three-Level PFC Rectifiers in 3-Wire and 4-Wire Configurations",

abstract = "This article presents a comprehensive analysis of neutral wire disconnection event in active three-phase three-level neutral-point-clamped (NPC) power factor correction (PFC) rectifier operating as front-end of uninterruptible power supply (UPS). It is revealed that upon four-wire to three-wire configuration transition, partial DC link voltages control loops become positive-feedback, yielding operational stability loss. Consequently, it is proposed to reverse partial DC link voltage loop gain polarities (e.g., by swapping the feedback signals) upon the above-mentioned event detection. As a result, partial DC link voltage loops retain negative feedback and stable operation of the system is preserved. The proposed approach was verified experimentally on an off-the-shelf 25 kVA commercial UPS system.",

keywords = "Active rectifier, power factor correction, three-level converter",

author = "Natan Schechter and Dmitry Baimel and Alon Kuperman",

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AB - This article presents a comprehensive analysis of neutral wire disconnection event in active three-phase three-level neutral-point-clamped (NPC) power factor correction (PFC) rectifier operating as front-end of uninterruptible power supply (UPS). It is revealed that upon four-wire to three-wire configuration transition, partial DC link voltages control loops become positive-feedback, yielding operational stability loss. Consequently, it is proposed to reverse partial DC link voltage loop gain polarities (e.g., by swapping the feedback signals) upon the above-mentioned event detection. As a result, partial DC link voltage loops retain negative feedback and stable operation of the system is preserved. The proposed approach was verified experimentally on an off-the-shelf 25 kVA commercial UPS system.

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Unified Control of Three-Level PFC Rectifiers in 3-Wire and 4-Wire Configurations

Abstract

Keywords

ASJC Scopus subject areas

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