Design and Implementation of a Single-Source 17-Level Inverter for a Single-Phase Transformer-Less Grid-Connected Photovoltaic Systems

Saikat Majumdar; Kartick Chandra Jana; Pradipta Kumar Pal; Ariya Sangwongwanich; Frede Blaabjerg

doi:10.1109/JESTPE.2021.3133369

Design and Implementation of a Single-Source 17-Level Inverter for a Single-Phase Transformer-Less Grid-Connected Photovoltaic Systems

Saikat Majumdar, Kartick Chandra Jana, Pradipta Kumar Pal, Ariya Sangwongwanich, Frede Blaabjerg

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

33 Citations (Scopus)

60 Downloads (Pure)

Abstract

Transformer-less multilevel inverters (MLIs) based on switched capacitors are gaining importance due to the voltage boosting ability from a single-input DC source and inherent capacitor voltage balancing capability. Most of the grid-connected transformer-less inverters are five-level and are commonly grounded so that their leakage current is zero. However, some major challenges like higher total standing voltage (TSV), more losses due to capacitor voltage ripples, higher charging current, and peak VA rating of the switches are comparatively higher. The motivation of the proposed work is to reduce the voltage ripple across the capacitors, minimum TSV, higher efficiency close to 98% at 1 kW, and lower cost. By using a modified sinusoidal pulse width modulation (SPWM) technique for the proposed single-phase 17-level inverter, a transformer-less grid-interfacing can be realized as the leakage current is (≈22 mA) well within the acceptable value (

Original language	English
Article number	9638640
Journal	IEEE Journal of Emerging and Selected Topics in Power Electronics
Volume	10
Issue number	4
Pages (from-to)	4469-4485
Number of pages	17
ISSN	2168-6777
DOIs	https://doi.org/10.1109/JESTPE.2021.3133369
Publication status	Published - Aug 2022

Bibliographical note

Publisher Copyright:
IEEE

Keywords

Capacitors
common-mode voltage (CMV)
Costs
Inverters
leakage current
Leakage currents
photovoltaic (PV) system
reduced cost
Topology
total standing voltage (TSV)
Transformer-less inverters
Transformers
Voltage

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Saikat manuscript_FinalAccepted author manuscript, 1.08 MB

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Cite this

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title = "Design and Implementation of a Single-Source 17-Level Inverter for a Single-Phase Transformer-Less Grid-Connected Photovoltaic Systems",

abstract = "Transformer-less multilevel inverters (MLIs) based on switched capacitors are gaining importance due to the voltage boosting ability from a single-input DC source and inherent capacitor voltage balancing capability. Most of the grid-connected transformer-less inverters are five-level and are commonly grounded so that their leakage current is zero. However, some major challenges like higher total standing voltage (TSV), more losses due to capacitor voltage ripples, higher charging current, and peak VA rating of the switches are comparatively higher. The motivation of the proposed work is to reduce the voltage ripple across the capacitors, minimum TSV, higher efficiency close to 98% at 1 kW, and lower cost. By using a modified sinusoidal pulse width modulation (SPWM) technique for the proposed single-phase 17-level inverter, a transformer-less grid-interfacing can be realized as the leakage current is (≈22 mA) well within the acceptable value (",

keywords = "Capacitors, common-mode voltage (CMV), Costs, Inverters, leakage current, Leakage currents, photovoltaic (PV) system, reduced cost, Topology, total standing voltage (TSV), Transformer-less inverters, Transformers, Voltage",

author = "Saikat Majumdar and Jana, {Kartick Chandra} and Pal, {Pradipta Kumar} and Ariya Sangwongwanich and Frede Blaabjerg",

note = "Publisher Copyright: IEEE",

year = "2022",

month = aug,

doi = "10.1109/JESTPE.2021.3133369",

language = "English",

volume = "10",

pages = "4469--4485",

journal = "IEEE Journal of Emerging and Selected Topics in Power Electronics",

issn = "2168-6777",

publisher = "IEEE (Institute of Electrical and Electronics Engineers)",

number = "4",

}

Design and Implementation of a Single-Source 17-Level Inverter for a Single-Phase Transformer-Less Grid-Connected Photovoltaic Systems. / Majumdar, Saikat; Jana, Kartick Chandra; Pal, Pradipta Kumar et al.
In: IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 10, No. 4, 9638640, 08.2022, p. 4469-4485.

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

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AU - Sangwongwanich, Ariya

AU - Blaabjerg, Frede

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KW - Costs

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KW - Leakage currents

KW - photovoltaic (PV) system

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KW - Topology

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KW - Voltage

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Design and Implementation of a Single-Source 17-Level Inverter for a Single-Phase Transformer-Less Grid-Connected Photovoltaic Systems

Abstract

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Keywords

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