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A reduced leakage current transformerless photovoltaic inverter

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  • Tey, Kok Soon
  • Mekhilef, Saad

Abstract

The transformerless inverters used in the grid connected photovoltaic (PV) system induce leakage current due to the absence of galvanic isolation and unstable common mode voltage. Even though, the leakage current is able to be reduced by using the H5 topology, it is still considered high due to the existence of junction capacitance in the switches during the freewheeling mode. In this paper, a six switches and two diodes single phase transformerless PV inverter with stable common mode voltage and reduced leakage current is proposed. The simulation of the proposed topology is carried out in MATLAB and validated experimentally. The results show that the proposed topology has lower leakage current as compared to the H5 topology.

Suggested Citation

  • Tey, Kok Soon & Mekhilef, Saad, 2016. "A reduced leakage current transformerless photovoltaic inverter," Renewable Energy, Elsevier, vol. 86(C), pages 1103-1112.
    • Handle: RePEc:eee:renene:v:86:y:2016:i:c:p:1103-1112
    DOI: 10.1016/j.renene.2015.09.039
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    References listed on IDEAS

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    1. Mekhilef, S. & Saidur, R. & Safari, A., 2011. "A review on solar energy use in industries," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(4), pages 1777-1790, May.
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    Cited by:

    1. Jorge Cardoso & Rodolfo Orosco & Nimrod Vazquez & Héctor López & Claudia Hernandez & Joaquin Vaquero, 2022. "High Efficiency Transformerless Photovoltaic DC/AC Converter with Common Mode Leakage Current Elimination: Analysis and Implementation," Energies, MDPI, vol. 15(9), pages 1-21, April.
    2. Negri, Simone & Tironi, Enrico & Superti-Furga, Gabrio & Carminati, Marco, 2021. "VSC-based LVDC distribution network with DERs: Equivalent circuits for leakage and ground fault currents evaluation," Renewable Energy, Elsevier, vol. 177(C), pages 1133-1146.
    3. Md. Faruk Kibria & Ahmed Elsanabary & Kok Soon Tey & Marizan Mubin & Saad Mekhilef, 2023. "A Comparative Review on Single Phase Transformerless Inverter Topologies for Grid-Connected Photovoltaic Systems," Energies, MDPI, vol. 16(3), pages 1-24, January.
    4. Khan, Ahmad & Ben-Brahim, Lazhar & Gastli, Adel & Benammar, Mohieddine, 2017. "Review and simulation of leakage current in transformerless microinverters for PV applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 74(C), pages 1240-1256.

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    More about this item

    Keywords

    HERIC inverter; H5 Topoogy; Leakage current; Photovoltaic inverter; Transformerless inverter;
    All these keywords.

    JEL classification:

    • H5 - Public Economics - - National Government Expenditures and Related Policies

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