Three-Phase ZVR Topology and Modulation Strategy for Transformerless PV System

Xiaoqiang Guo; Xue Zhang; Honglei Guan; Tamas Kerekes; Frede Blaabjerg

doi:10.1109/TPEL.2018.2849074

Three-Phase ZVR Topology and Modulation Strategy for Transformerless PV System

Xiaoqiang Guo, Xue Zhang, Honglei Guan, Tamas Kerekes, Frede Blaabjerg

Research output: Contribution to journal › Journal article › Research › peer-review

41 Citations (Scopus)

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Abstract

Leakage current reduction is crucial for operating transformerlss PV systems. In this letter, a new three-phase topology and modulation strategy is proposed. It is derived from the single-phase ZVR (zero-voltage state rectifier) topology, but the operation mechanism is quite different. Therefore, a new modulation strategy based on the Boolean logic function is proposed to achieve the constant common mode voltage, so as to eliminate the leakage current. Finally, the experimental tests are carried out to verify the feasibility and effectiveness of the proposed solution.

Original language	English
Article number	8389205
Journal	IEEE Transactions on Power Electronics
Volume	34
Issue number	2
Pages (from-to)	1017 - 1021
Number of pages	5
ISSN	0885-8993
DOIs	https://doi.org/10.1109/TPEL.2018.2849074
Publication status	Published - Feb 2019

Keywords

Leakage currents
transformerless PV systems
Inverter

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10.1109/TPEL.2018.2849074

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title = "Three-Phase ZVR Topology and Modulation Strategy for Transformerless PV System",

abstract = "Leakage current reduction is crucial for operating transformerlss PV systems. In this letter, a new three-phase topology and modulation strategy is proposed. It is derived from the single-phase ZVR (zero-voltage state rectifier) topology, but the operation mechanism is quite different. Therefore, a new modulation strategy based on the Boolean logic function is proposed to achieve the constant common mode voltage, so as to eliminate the leakage current. Finally, the experimental tests are carried out to verify the feasibility and effectiveness of the proposed solution.",

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AU - Guo, Xiaoqiang

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AU - Kerekes, Tamas

AU - Blaabjerg, Frede

PY - 2019/2

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N2 - Leakage current reduction is crucial for operating transformerlss PV systems. In this letter, a new three-phase topology and modulation strategy is proposed. It is derived from the single-phase ZVR (zero-voltage state rectifier) topology, but the operation mechanism is quite different. Therefore, a new modulation strategy based on the Boolean logic function is proposed to achieve the constant common mode voltage, so as to eliminate the leakage current. Finally, the experimental tests are carried out to verify the feasibility and effectiveness of the proposed solution.

AB - Leakage current reduction is crucial for operating transformerlss PV systems. In this letter, a new three-phase topology and modulation strategy is proposed. It is derived from the single-phase ZVR (zero-voltage state rectifier) topology, but the operation mechanism is quite different. Therefore, a new modulation strategy based on the Boolean logic function is proposed to achieve the constant common mode voltage, so as to eliminate the leakage current. Finally, the experimental tests are carried out to verify the feasibility and effectiveness of the proposed solution.

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KW - transformerless PV systems

KW - Inverter

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JF - IEEE Transactions on Power Electronics

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Three-Phase ZVR Topology and Modulation Strategy for Transformerless PV System

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