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

Authors(2) :-S. K. Janarthanan, Dr. S. U. Prabha

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.

Authors and Affiliations

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

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

  1. T. Kerekes, R. Teodorescu, P. Rodríguez, G. Vázquez, and E. Aldabas, “A new high-efficiency single-phase transformerless PV inverter topology,” IEEE Trans. Ind. Electron., vol. 58, no. 1, pp. 184–191, Jan. 2011.
  2. Y. Bae and R. Y. Kim, “Suppression of common-mode voltage using a multicentral photovoltaic inverter topology with synchronized PWM,” IEEE Trans. Ind. Electron., vol. 61, no. 9, pp. 4722–4733, Sep. 2014.
  3. D. Barater, G. Buticchi, E. Lorenzani, and C. Concari, “Active common- mode filter for ground leakage current reduction in grid-connected PV converters operating with arbitrary power factor,” IEEE Trans. Ind. Electron., vol. 61, no. 8, pp. 3940–3950, Aug. 2014.
  4. M. C. Cavalcanti, A. M. Farias, F. A. S. Neves, and J. L. Afonso, “Elimi- nating leakage currents in neutral point clamped inverters for photovoltaic systems,” IEEE Trans. Power Electron., vol. 59, no. 1, pp. 435–443, Jan. 2012.
  5. T. Shimizu, T. Fujita, G. Kimura, and J. Hirose, “A unity power factor PWM rectifier with dc ripple compensation,” IEEE Trans. Ind. Electron., vol. 44, no. 4, pp. 447–455, Aug. 1997.
  6. S. Wang et al., “A flicker-free electrolytic  capacitor-less ac–dc LED driver,” IEEE Trans. Power Electron., vol. 27, no. 11, pp. 4540–4548, Nov. 2012.
  7. R. Wang, F. Wang, D. Boroyevich, and P. Ning, “A high power density single-phase PWM rectifier with active ripple energy storage,” IEEE Trans. Power Electron., vol. 26, no. 5, pp. 1378–1383, May 2011.
  8. H. Li, K. Zhang, H. Zhao, S. Fan, and J. Xiong, “Active power  for high-power single-phase PWM rectifiers,” IEEE Trans. Power Electron., vol. 28, no. 3, pp. 1308–1319, Mar. 2013.
  9. F. Bradaschia et al., “Modulation for three-phase transformerless Z-source inverter to reduce leakage currents in photovoltaic systems,” IEEE Trans. Ind. Electron., vol. 58, no. 12, pp. 5385–5395, Dec. 2011.
  10. X. Guo, M. C. Cavalcanti, A. M. Farias, and J. M. Guerrero, “Single- carrier modulation for neutral-point-clamped inverters in three-phase transformerless  photovoltaic  systems,” IEEE  Trans.  Power Electron., vol. 28, no. 6, pp. 2635–2637, Jun. 2013.
  11. G. He, D. Xu, and M. Chen, “A novel control strategy of suppressing dc current injection to the grid for single-phase PV inverter,” IEEE Trans. Power Electron., vol. 30, no. 3, pp. 1274–1266, Mar. 2015.
  12. G. R. Zhu, S. C. Tan, Y. Chen, and C. K. Tse, “Mitigation of low- frequency current ripple in fuel-cell inverter systems through waveform control,” IEEE Trans. Power Electron., vol. 28, no. 2, pp. 779–792, Feb. 2013.
  13. I. Serban, “A novel transistor-less power decoupling solution for single- phase inverters,” in Proc. IEEE IECON, 2013, pp. 1496–1500, Feb. 2013.
  14. D. N. Zmood and D. G. Holmes, “Stationary frame current regulation of  PWM inverters  with  zero  steady-state  error,”  IEEE Trans. Power Electron., vol. 18, no. 3, pp. 814–822, May 2003.
  15. W. L. Chen and J. S. Lin, “One-dimensional optimization for proportional-resonant controller design against the change in source impedance and solar irradiation in PV systems,” IEEE Trans. Ind. Electron., vol. 61, no. 4, pp. 1845–1854, Apr. 2014.
  16. J. Wang, J. D. Yan, L. Jiang, and J. Zou, “Delay-dependent stability of single-loop controlled grid-connected inverters with LC L filters,” IEEE Trans. Power Electron., vol. 31, no. 1, pp. 743–757, Jan. 2016.

Publication Details

Published in : Volume 3 | Issue 2 | March-April 2017
Date of Publication : 2017-04-30
License:  This work is licensed under a Creative Commons Attribution 4.0 International License.
Page(s) : 712-716
Manuscript Number : IJSRSET1732190
Publisher : Technoscience Academy

Print ISSN : 2395-1990, Online ISSN : 2394-4099

Cite This Article :

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.
Journal URL : http://ijsrset.com/IJSRSET1732190

Follow Us

Contact Us