Single-Phase Transformerless PV Power Conditioning Systems with Low Leakage Current and Active Power Decoupling Capability

Hoang Vu Nguyen; Do-Hyeon Park; Dong-Choon Lee

Single-Phase Transformerless PV Power Conditioning Systems with Low Leakage Current and Active Power Decoupling Capability

Hoang Vu Nguyen

Do-Hyeon Park

Dong-Choon Lee

Vol. 18, No. 4, pp. 997-1006, Jul. 2018

10.6113/JPE.2018.18.4.997

Active power decoupling

Boost inverter

Leakage reduction

PV inverter

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Abstract

This paper proposes a transformerless photovoltaic (PV) power converter system based on the DC/AC boost inverter, which can solve the leakage current and second-order ripple power issues in single-phase grid-connected PV inverters. In the proposed topology, the leakage current can be decreased remarkably since most of the common-mode currents flow through the output capacitor, by-passing parasitic capacitors, and grounding resistors. In addition, the inherent ripple power component in the single-phase grid inverter can be suppressed without adding any extra components. Therefore, bulky electrolytic capacitors can be replaced by small film capacitors. The effectiveness of the proposed topology has been verified by simulation and experimental results for a 1-kW PV PCS.

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Cite this article

[IEEE Style]

H. V. Nguyen, D. Park, D. Lee, "Single-Phase Transformerless PV Power Conditioning Systems with Low Leakage Current and Active Power Decoupling Capability," Journal of Power Electronics, vol. 18, no. 4, pp. 997-1006, 2018. DOI: 10.6113/JPE.2018.18.4.997.

[ACM Style]

Hoang Vu Nguyen, Do-Hyeon Park, and Dong-Choon Lee. 2018. Single-Phase Transformerless PV Power Conditioning Systems with Low Leakage Current and Active Power Decoupling Capability. Journal of Power Electronics, 18, 4, (2018), 997-1006. DOI: 10.6113/JPE.2018.18.4.997.