Design of Photovoltaic H6 -Type Transformerless Inverter Topology to Minimize Leakage Current

Md Aftab Alam; S V A V Prasad; Mohammed Asim

doi:10.17485/IJST/v16i27.1051

Article

Design of Photovoltaic H6 -Type Transformerless Inverter Topology to Minimize Leakage Current

VIEWS 511
PDF 137

Indian Journal of Science and Technology

DOI: 10.17485/IJST/v16i27.1051

Year: 2023, Volume: 16, Issue: 27, Pages: 2068-2075

Original Article

Design of Photovoltaic H6 -Type Transformerless Inverter Topology to Minimize Leakage Current

Md Aftab Alam¹, S V A V Prasad¹, Mohammed Asim^2*

¹Electronics and Communication Engineering Department, Lingayas Vidyapeeth, Faridabad, 121002, India
²Department of Electrical Engineering, Integral University, Lucknow, India

*Corresponding Author
Email: [email protected]

Received Date:04 May 2023, Accepted Date:20 June 2023, Published Date:17 July 2023

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

Abstract

Objectives: A leakage current issue that was mitigated by isolation transformers in a grid-connected photovoltaic system must now be addressed by the converters themselves. The paper presents the H6 inverter topology that solved the leakage current problem at the same time as maintaining a high efficiency and a low total harmonic distortion [THD]. Methods: Inverter topology H6 has been designed to reduce leakage current. A comparison of performance has been done using MATLAB/SIMULINK software. Efficiency, leakage currents, and common modes voltage are the primary parameters for analysis. Simulations of H4, H5 and H6 topologies will be carried out and results will be compared. Findings: H6 topology suppresses leakage current to a fairly acceptable magnitude when compared to other topologies. A comparison was made between the H6 and the traditional H4 and H5 topology and the leakage current in the H6 topology is 42.47mA as opposed to 46.87mA in H5 and 803.10mA in H4. Novelty: SPWM modulation and the H6 inverter topology are presented in the study. Using an H5 topology with an additional switch, an H6 inverter is designed. Direct current in one of the active modes of the H6 topology, fewer switches are required to make current flow, which reduces conduction losses. By maintaining a constant common mode voltage, an H6 inverter eliminates leakage currents. Thus, transformerless grid-connected photovoltaic systems with H6 inverters reduce conduction losses and leakage currents. The simulation results are provided as a means of verifying the topology. The leakage current has been found to be reduced to 42.47mA.

Keywords: Transformerless-Inverter; PV System; Leakage Current; H4; H5; And H6 Inverter

References

Ministry of New & Renewable Energy, Government of India. Physical Progress. 2022. Available from: https://mnre.gov.in/the-ministry/physical-progress
Verma M. Analysis, Design, and Control of a Single-Phase Single-Stage Grid-Connected Transformerless Solar Inverter. Quebec, Canada. 2019.
Desai AA, Mikkili S, Senjyu T. Novel H6 Transformerless Inverter for Grid Connected Photovoltaic System to Reduce the Conduction Loss and Enhance Efficiency. Energies. 2022;15(10):3789. Available from: https://doi.org/10.3390/en15103789
Alam MA, Prasad SVAV, Asim M. Comparison and Analysis of Transformer-less Topologies for Grid-Connected PV Systems. 2022 2nd International Conference on Emerging Frontiers in Electrical and Electronic Technologies (ICEFEET). 2022;p. 1–6. Available from: https://doi.org/10.1109/ICEFEET51821.2022.9848108
Siddiqui MI, Khan I, Ali MA. Transformerless Inverter Topologies for Grid-Connected PV System. Available from: https://icetet.net/downloads/ICETET-2022-Book.pdf
Akhtar I, Asim M, Yadav RK, Agarwal P, Kirmani S. Design of Effective Grid-Connected Solar System. In: Inventive Computation Technologies. (pp. 606-614) Springer International Publishing. 2020.
Asim M, Hassan MH, Anis M, Zaid M, Khan FA. Analysis of Integrated DC-DC Converter-Based Grid Connected Transformer-less Photovoltaic Inverter. 2022 2nd International Conference on Emerging Frontiers in Electrical and Electronic Technologies (ICEFEET). 2022;p. 1–5. Available from: https://doi.org/10.1109/ICEFEET51821.2022.9848008
Aljafari B, Loganathan AK, Vairavasundaram I, Ramachadran S, Nagarajan AP. Analysis of a Photovoltaic System Based on a Highly Efficient Single-Phase Transformerless Inverter. Energies. 2022;15(17):6145. Available from: https://doi.org/10.3390/en15176145
Rahman MM, Hossain MS, Talukder MSI, Uddin MN. Transformerless Six-Switch (H6)-based Single-Phase Inverter for Grid-Connected Photovoltaic System With Reducd Leakage Current. In: 2020 IEEE Industry Applications Society Annual Meeting. (pp. 1-8) IEEE. 2020.
Janardhan G, Babu NNVS, Srinivas GN. Single phase transformerless inverter for grid connected photovoltaic system with reduced leakage current. Electrical Engineering & Electromechanics. 2022;(5) 36–40. Available from: https://doi.org/10.20998/2074-272X.2022.5.06
Liu Y, Zhou Y, Guo B, Wang H, Su M, Liang X, et al. Bimodal Transformerless Inverter With Three Switches. IEEE Transactions on Industrial Electronics. 2022;69(9):8972–8983. Available from: https://doi.org/10.1109/TIE.2021.3114718
Jayakumar V, Chokkalingam B, Munda JL. A Comprehensive Review on Space Vector Modulation Techniques for Neutral Point Clamped Multi-Level Inverters. IEEE Access. 2021;9:112104–112144. Available from: https://doi.org/10.1109/ACCESS.2021.3100346
Asim M, Khan MS, Yadav RK, Mewara HS, Sethy N. Multilevel Inverters Operating with Improved Harmonic Performance Using SVPWM. In: C, CK, S, JR, S, A, et al. , eds. Lecture Notes in Electrical Engineering. (Vol. 820, pp. 149-156) Springer Nature Singapore. 2022.
Rahman MM, Hossain MS, Talukder MSI, Uddin MN. Transformerless Six-Switch (H6)-Based Single-Phase Inverter for Grid-Connected Photovoltaic System With Reduced Leakage Current. IEEE Transactions on Industry Applications. 2022;58(1):974–985. Available from: https://doi.org/10.1109/TIA.2021.3131295
Transformerless Inverter Topologies with Condensed Leakage Current Structure for Grid-tied Photovoltaic System: Design and Analysis. 2023 Second International Conference on Electronics and Renewable Systems (ICEARS). 2023;p. 115–118. Available from: https://doi.org/10.1109/ICEARS56392.2023.10085563
A SP, Subathra MSP, Bharatiraja CSP, Kumar NM, Alhelou HH. A topology review and comparative analysis on transformerless grid‐connected photovoltaic inverters and leakage current reduction techniques. IET Renewable Power Generation. 2022. Available from: https://doi.org/10.1049/rpg2.12655
Mahmoudian M, Rodrigues EMG, Pouresmaeil E. An Efficient H7 Single-Phase Photovoltaic Grid Connected Inverter for CMC Conceptualization and Mitigation Method. Electronics. 9(9):1440. Available from: https://doi.org/10.3390/electronics9091440
Transformerless Inverter Topologies with Condensed Leakage Current Structure for Grid-tied Photovoltaic System: Design and Analysis. 2023 Second International Conference on Electronics and Renewable Systems (ICEARS). 2023;p. 115–118. Available from: https://doi.org/10.1109/ICEARS56392.2023.10085563
Geetha K, Sreenivasappa BV. H5-ZVR Single-Phase Grid-Tied Inverters for Photovoltaic Application. International Journal of Renewable Energy Research. 2021;11:1178–1187. Available from: https://doi.org/10.20508/ijrer.v11i3.12151.g8249
Saha A, Ahmad S, Mekhilef S, Jhuma UK, Islam H, Chowdhury ZA, et al. Comparative Study of Different Transformer-less Inverter Topologies for Grid-tied Photovoltaic System. 2019 5th International Conference on Advances in Electrical Engineering (ICAEE). 2019;p. 783–788. Available from: https://doi.org/10.1109/ICAEE48663.2019.8975675

Copyright

© 2023 Alam et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee)