Common mode voltage in case of transformerless PV inverters connected to the grid

@article{Kerekes2008CommonMV,
  title={Common mode voltage in case of transformerless PV inverters connected to the grid},
  author={Tam{\'a}s Kerekes and Remus Teodorescu and Marco Liserre},
  journal={2008 IEEE International Symposium on Industrial Electronics},
  year={2008},
  pages={2390-2395}
}
For safety reasons grid connected PV systems include galvanic isolation. In case of transformerless inverters, the leakage ground current through the parasitic capacitance of the PV panels, can reach very high values. A common-mode model based on analytical approach is introduced, used to predict the common-mode behavior, at frequencies lower than 50 kHz, of the selected topologies and to explain the influence of system imbalance on the leakage current. It will be demonstrated that the neutral… CONTINUE READING
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