Generalized Design of Transformer Less Photovoltaic Inverter for Elimination of Leakage Current and Pulsating Power in Grid Connected System

Authors

  • S. K. Janarthanan  Department of Electrical and Electronics Engineering, Sri Ramakrishna Engineering college, Coimbatore, Tamil Nadu, India
  • Dr. S. U. Prabha  Department of Electrical and Electronics Engineering, Sri Ramakrishna Engineering college, Coimbatore, Tamil Nadu, India

Keywords:

Multi Input Transformer(MIC), Maximum Power Point Tracking(MPPT), Power flow management.

Abstract

This paper presents a transformer less inverter topology, which is capable of simultaneously solving leak- age current and pulsating power issues in grid-connected photovoltaic (PV) systems. Without adding any additional components to the system, the leakage current caused by the PV-to-ground parasitic capacitance can be bypassed by introducing a common-mode (CM) conducting path to the inverter. The resulting ground leakage current is therefore well controlled to be below the regulation limit. Furthermore, the proposed inverter can also eliminate the well-known double-line-frequency pulsating power that is inherent in single-phase PV systems. By properly injecting CM voltages to the output ?lter capacitors, the pulsating power can be decoupled from the dc-link. Therefore, it is possible to use long-lifetime ?lm capacitors instead of electrolytic capacitors to improve the reliability of the PV system.

References

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International Journal of Scientific Research in Science, Engineering and Technology

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Published

2017-04-30

Issue

Volume 3, Issue 2, March-April-2017

Section

Research Articles

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This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
S. K. Janarthanan, Dr. S. U. Prabha, " Generalized Design of Transformer Less Photovoltaic Inverter for Elimination of Leakage Current and Pulsating Power in Grid Connected System, International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 3, Issue 2, pp.712-716, March-April-2017.