Grid-connected applications of renewable energy sources(solar energy) are increasing day by day. For these applications, transformers play an important role in facilitating galvanic isolation and suitable voltage ratio for interconnection between grid and inverter. However, the omitting of the transformers from the complete power conversion system becomes inevitable because of having large size/weight and cost. Hence transformerless inverters are replacing conventional inverters for grid-connected PV systems at a rapid pace. It has been observed that a transformerless grid-connected H bridge inverter established a common mode resonant circuit with the formation of parasitic capacitance between PV terminals and grounded frame and hence, consequently, leakage current induced in the system. In this paper, a mathematical model has been derived by using source transformation approach for the common-mode resonant circuit of H bridge grid-connected PV inverter, and further, it has been analyzed for both unipolar and bipolar modulation strategies. Finally, a 1kW grid-connected single-phase H bridge PV inverter has been simulated on Matlab and verified with satisfactory results.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Common Mode Leakage Current Analysis of 1ϕ Grid-Tied Transformer Less H-Bridge PV Inverter


    Contributors:


    Publication date :

    2021-01-21


    Size :

    357543 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Elimination of Leakage Current in Grid-Tied PV Applications

    Yadav, Anamika Prakash / Patil, U. V. | IEEE | 2019



    Design issues for wind farms grid tied Inverter

    Caruso, M. / Di Tommaso, A. O. / Genduso, F. et al. | IEEE | 2017



    Analysis of Three-Phase Grid-Tied Thyristor Based Inverter for Solar PV Applications

    Ahmad, Bilal / Amrr, Syed Muhammad / Nabi, M. et al. | IEEE | 2021