PERFORMANCE INVESTIGATION OF SINGLE-PHASE TRANSFORMERLESS PV INVERTER CONNECTED TO LOW VOLTAGE NETWORK

Authors

  • SALIHA BOULAHCHICHE LGMM Laboratory, Université 20 août 1955-Skikda, PB N◦ 26 Route Elhadaik, 21000 Skikda, Algeria;Centre de Développement des Energies Renouvelables BP. 62, Route de l'Observatoire Bouzareah, 16340 Algiers, Algeria Author
  • AMAR HADJ ARAB Centre de Développement des Energies Renouvelables BP. 62, Route de l'Observatoire Bouzareah, 16340 Algiers, Algeria Author
  • SALIM HADDAD LGMM Laboratory, Université 20 août 1955-Skikda, PB N◦ 26 Route Elhadaik, 21000 Skikda, Algeria Author
  • ISMAIL BENDAAS Centre de Développement des Energies Renouvelables BP. 62, Route de l'Observatoire Bouzareah, 16340 Algiers, Algeria Author
  • ABDELHAK RAZAGUI Centre de Développement des Energies Renouvelables BP. 62, Route de l'Observatoire Bouzareah, 16340 Algiers, Algeria Author
  • SALIM BOUCHAKOUR Centre de Développement des Energies Renouvelables BP. 62, Route de l'Observatoire Bouzareah, 16340 Algiers Author

DOI:

https://doi.org/10.59277/RRST-EE.2024.1.10

Keywords:

Grid-connected photovoltaic (PV) system, Transformerless PV inverter, Galvanic isolation, Leakage current, Insulation resistance

Abstract

Due to their high efficiency and reduced size and weight compared to transformer-based inverters, transformerless single-phase inverters are the most widely used in photovoltaic systems connected to the low-voltage grid. Unfortunately, the absence of galvanic isolation leads to ground faults caused by capacitive leakage current flow and deterioration of the inverter's insulation resistance on the dc side. This paper examines the performance of the three transformerless single-phase inverters of the first grid-connected photovoltaic system in Algeria under adverse weather conditions, such as rain, as there is no galvanic isolation between the dc and ac side of the inverter, making operation of the photovoltaic system more difficult. The flow of capacitive leakage current from the earth to the inverter output is one of the two phenomena, resulting in protection devices being triggered involuntarily. The second phenomenon is system shutdown due to a decrease in the inverter's insulation resistance at the input. The VDE 126-1-1 standard integrated into the inverter, which defines the safety requirements for grid-connected photovoltaic systems, is used in this article to manage and analyze both phenomena.

References

(1) T.H. Van, T.L. Van, T.M. Nguyen Thi, M.Q. Duong, G.N. Sava, Improving the output of dc-dc converter by phase shift full bridge applied to renewable energy, Rev. Roum. Sci. Techn.– Électrotechn. et Énerg., 66, 3, pp. 175–180 (2021).

(2) H. Sridharan, S. Ramalingam, A. Jawahar, Wide boost ratio in quasi-impedance network converter using switch voltage spike reduction technique, Rev. Roum. Sci. Techn.– Électrotechn. et Énerg., 68, 3, pp. 259–265 (2023).

(3) D. Roy, M. Singh, Realization of a three-level neutral point clamped inverter using a novel region selection approach of bus clamping PWM for electric vehicle application, Rev. Roum. Sci. Techn.– Électrotechn. et Énerg. 68, 2, pp. 139–145 (2023).

(4) E. Melić, A. bosović, M. Musić. Analysis of the impact of different distributed generator technologies on harmonic voltages, Rev. Roum. Sci. Techn.– Électrotechn. et Énerg., 68, 2, pp. 146–151 (2023).

(5) M.A. Ilie, D. Floricău, Grid-connected photovoltaic systems with multilevel converters – modeling and analysis, Rev. Roum. Sci. Techn.– Électrotechn. et Énerg., 68, 1, pp. 77–83 (2023).

(6) I. Picioroaga, A. Tudose, D. Sidea, C. Bulac , L. Toma, Power supply restoration in active distribution networks with high photovoltaic penetration based on soft open points, Rev. Roum. Sci. Techn.– Électrotechn. Et Énerg., 66, 3, pp. 181–186 (2021).

(7) A. Boudghene Stambouli, Z. Khia, S. Flazi, Y. Kitamura, A review on the renewable energy development in Algeria: current perspective, energy scenario and sustainability issues, Renewable and Sustainable Energy Reviews., 16, 7, pp. 4445–4460 (2012)

(8) I. Bendaas, A. Hadj Arab, B. Taghezouit, S. Bouchakour, I. N. Elghoul, S. Boulahchiche, S. Semaoui, S. Bouacha, A. Razagui, Effect of a new smarts photovoltaic inverters connected with a distribution network in Algeria, IEEE 6th International Symposium on New and Renewable Energy (SIENR), pp. 1–6 (2021).

(9) M. Obi, R. Bass, Trends and challenges of grid-connected photovoltaic systems – a review, Renewable and Sustainable Energy Reviews., 58, 1082–1094 (2016).

(10) R. Ramesh, A.J. Dhanaseely, P. Pughazendiran, Single phase transformer based inverter for nonlinear load application using pi controller, Journal of Engineering Research and Applications, 4, 3, pp. 86–90 (2014).

(11) S. Kirthiga, N.M. Jothi Swaroopan, Highly reliable inverter topology with a novel soft computing technique to eliminate leakage current in grid-connected transformerless photovoltaic systems, Computers And Electrical Engineering, 68, pp. 1082–1094 (2018).

(12) ***Technical information SMA, Courants de fuite capacitifs pour le dimensionnement d’onduleurs sans transformateur Sunny Boy, Sunny Mini Central ET Sunny Tripower, éditions 25.

(13) W.Chen, X.Yang, W.Zhang, X.Song, Leakage current calculation for PV inverter system based on a parasitic capacitor Model, IEEE Transactions on Power Electronics, 31, 12, pp. 8205–8217 (2016).

(14) Z. Liao, C. Cao, D. Qiu, Analysis on topology derivation of single-phase transformerless photovoltaic grid-connect inverters, Optik., 182, pp. 50–57 (2018).

(15) ***Technical information SMA, Résistance d’isolement (Riso) d’installations photovoltaïques sans séparation galvanique.

(16) ***DIN VDE V 0126-1-1 VDE V 0126-1-1, Automatic disconnection device between a generator and the public low-voltage grid (2013).

(17) J. Flicker, J. Johnson, M. Albers, G.Ball, Recommendations for isolation monitor ground fault detectors on residential and utility-scale PV systems, IEEE 42nd Photovoltaic Specialist Conference (PVSC). pp. 1–6 (2015).

(18) R. Araneo, M. Mitolo, Insulation resistance and failures of a high-power grid-connected photovoltaic installation: a case study, IEEE Industry Applications Magazine, 27, 3, pp.16–22 (2021).

(19) S. Bouacha,A. Malek,O. Benkraouda, A. Hadj Arab, A. Razagui, S. Boulahchiche, S. Semaoui, Performance analysis of the first photovoltaic grid-connected system in Algeria, Energy for Sustainable Development, 57, pp. 1–11 (2020).

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Published

04.04.2024

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Section

Électronique et transmission de l’information | Electronics & Information Technology

How to Cite

PERFORMANCE INVESTIGATION OF SINGLE-PHASE TRANSFORMERLESS PV INVERTER CONNECTED TO LOW VOLTAGE NETWORK. (2024). REVUE ROUMAINE DES SCIENCES TECHNIQUES — SÉRIE ÉLECTROTECHNIQUE ET ÉNERGÉTIQUE, 69(1), 55-60. https://doi.org/10.59277/RRST-EE.2024.1.10