Optimal placement of additional switch in the photovoltaic single-phase grid-connected transformerless full bridge inverter for reducing common mode leakage current

Rahimi, Ramin; Afshari, Ehsan; Farhangi, Babak; Farhangi, Shahrokh

doi:10.1109/cencon.2015.7409579

Cited by 20 publications

(3 citation statements)

References 25 publications

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“…Full-bridge inverter is a classical transformerless inverter, which is widely used in photovoltaic power generation system due to its advantages of simple topology and easy control. However, it has a high leakage current during operation, which may cause some safety problems on some occasions and limit its application [14].…”

Section: Introductionmentioning

confidence: 99%

Overview of Recent Advanced Topologies for Transformerless Dual-Grounded Inverters

Guo

Zhang

Tang

et al. 2022

IEEE Trans. Power Electron.

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Transformerless inverters, most of which are H-bridge inverters, have been widely used and studied in grid-connected power systems in the last decades. However, the H-bridge inverter is affected by the low and high frequency common mode voltage between the input and output terminals, resulting in a large common mode leakage current. An alternative solution is to connect the ground of the input terminal to the output load or grid, that is, the dual-grounded inverter. In this case, the low and high frequency common-mode voltage can be mitigated or eliminated. As a matter of fact, scholars have made a number of research results on dual-grounded inverter. However, as of now, there is still no literature that comprehensively and systematically summarizes these research results. In order to fill this gap, this article classifies different types of dual-grounded inverters from the perspective of topology for the first time, and compares and summarizes their advantages and disadvantages. More than 60 literatures have been reviewed to identify the practical implementation challenges and research opportunities in the application of dual-grounded inverters.Index terms--Transformerless inverter, dual-grounded inverter, common-mode voltage, leakage current.

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Section: Introductionmentioning

confidence: 99%

Overview of Recent Advanced Topologies for Transformerless Dual-Grounded Inverters

Guo

Zhang

Tang

et al. 2022

IEEE Trans. Power Electron.

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“…Line-frequency isolated transformers are bulky; it makes the PV inverter large and heavy, which is difficult to carry and install. In comparison, Transformer-less (TL) PV grid-connected systems benefit from improved size, cost, weight, and efficiency [6][7][8][9][10][11][12][13][14]. Additionally, three-phase inverters will not suffer from double-line-frequency ripples at the dc-link and thus smaller capacitive filters will be sufficient to maintain the voltage in the dc-link [15][16][17][18], making the entire system more reliable [19].…”

Section: Introductionmentioning

confidence: 99%

“…The amplitude of the leakage current depends on the converter topology and the modulation scheme. According to the VDE 0126-01-01standard, the RMS value of the leakage current has to be limited below 300 mA [8,[24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Filter-Clamped Two-Level Three-Phase Transformerless Grid-Connected Photovoltaic Inverter for Leakage Current Reduction

Rahimi¹,

Farhadi²,

Moradi³

et al. 2020

SSRN Journal

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Evaluation of Leakage Current in Single-Phase H-Type Transformerless Inverters for PV Grid System

Imran

Mane

2020

Advances in Greener Energy Technologies

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Optimal placement of additional switch in the photovoltaic single-phase grid-connected transformerless full bridge inverter for reducing common mode leakage current

Cited by 20 publications

References 25 publications

Overview of Recent Advanced Topologies for Transformerless Dual-Grounded Inverters

Overview of Recent Advanced Topologies for Transformerless Dual-Grounded Inverters

Filter-Clamped Two-Level Three-Phase Transformerless Grid-Connected Photovoltaic Inverter for Leakage Current Reduction

Evaluation of Leakage Current in Single-Phase H-Type Transformerless Inverters for PV Grid System

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