Novel H6 Transformerless Inverter for Grid Connected Photovoltaic System to Reduce the Conduction Loss and Enhance Efficiency
Presence of a transformer in a grid connected photovoltaic system provides galvanic isolation between the photovoltaic panels and the grid. However, it increases the overall cost, makes the circuit bulky and reduces the efficiency of the system. Hence, transformerless inverters have gained significa...
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MDPI AG
2022-05-01
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Series: | Energies |
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Online Access: | https://www.mdpi.com/1996-1073/15/10/3789 |
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author | Aditi Atul Desai Suresh Mikkili Tomonobu Senjyu |
author_facet | Aditi Atul Desai Suresh Mikkili Tomonobu Senjyu |
author_sort | Aditi Atul Desai |
collection | DOAJ |
description | Presence of a transformer in a grid connected photovoltaic system provides galvanic isolation between the photovoltaic panels and the grid. However, it increases the overall cost, makes the circuit bulky and reduces the efficiency of the system. Hence, transformerless inverters have gained significant importance owing to its low cost, light weight and increased efficiency. However, due to the absence of the transformer, there is no galvanic isolation between photovoltaic panels and the grid and there is always a threat of flow of leakage current. In this research paper, an elaborate analysis of H4, H5 and H6 transformerless inverter is carried out. DC side decoupled circuits are studied to eliminate the leakage current. Their performances are compared based on the simulations carried out in MATLAB/SIMULINK software. A novel H6 inverter is proposed by introducing an additional switch in H5 topology. A direct current path is provided in H5 topology during one of the active modes, so that current flows through few switches thereby reducing the conduction losses. Common mode voltage remains constant in the proposed H6 inverter and hence the leakage current is eliminated. The proposed H6 inverter can thus be a promising topology to eliminate leakage current and reduce conduction loss in the transformerless grid connected photovoltaic system. |
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id | doaj.art-0cae0bed0b4643b9af7b86b916a58f0f |
institution | Directory Open Access Journal |
issn | 1996-1073 |
language | English |
last_indexed | 2024-03-10T03:56:43Z |
publishDate | 2022-05-01 |
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spelling | doaj.art-0cae0bed0b4643b9af7b86b916a58f0f2023-11-23T10:53:09ZengMDPI AGEnergies1996-10732022-05-011510378910.3390/en15103789Novel H6 Transformerless Inverter for Grid Connected Photovoltaic System to Reduce the Conduction Loss and Enhance EfficiencyAditi Atul Desai0Suresh Mikkili1Tomonobu Senjyu2Electrical and Electronics Engineering Department, National Institute of Technology, Ponda 403401, IndiaElectrical and Electronics Engineering Department, National Institute of Technology, Ponda 403401, IndiaDepartment of Electrical and Electronics Engineering, University of Ryukyus, Okinawa 903-0213, JapanPresence of a transformer in a grid connected photovoltaic system provides galvanic isolation between the photovoltaic panels and the grid. However, it increases the overall cost, makes the circuit bulky and reduces the efficiency of the system. Hence, transformerless inverters have gained significant importance owing to its low cost, light weight and increased efficiency. However, due to the absence of the transformer, there is no galvanic isolation between photovoltaic panels and the grid and there is always a threat of flow of leakage current. In this research paper, an elaborate analysis of H4, H5 and H6 transformerless inverter is carried out. DC side decoupled circuits are studied to eliminate the leakage current. Their performances are compared based on the simulations carried out in MATLAB/SIMULINK software. A novel H6 inverter is proposed by introducing an additional switch in H5 topology. A direct current path is provided in H5 topology during one of the active modes, so that current flows through few switches thereby reducing the conduction losses. Common mode voltage remains constant in the proposed H6 inverter and hence the leakage current is eliminated. The proposed H6 inverter can thus be a promising topology to eliminate leakage current and reduce conduction loss in the transformerless grid connected photovoltaic system.https://www.mdpi.com/1996-1073/15/10/3789transformerless inverterleakage currentcommon mode voltageparasitic capacitance |
spellingShingle | Aditi Atul Desai Suresh Mikkili Tomonobu Senjyu Novel H6 Transformerless Inverter for Grid Connected Photovoltaic System to Reduce the Conduction Loss and Enhance Efficiency Energies transformerless inverter leakage current common mode voltage parasitic capacitance |
title | Novel H6 Transformerless Inverter for Grid Connected Photovoltaic System to Reduce the Conduction Loss and Enhance Efficiency |
title_full | Novel H6 Transformerless Inverter for Grid Connected Photovoltaic System to Reduce the Conduction Loss and Enhance Efficiency |
title_fullStr | Novel H6 Transformerless Inverter for Grid Connected Photovoltaic System to Reduce the Conduction Loss and Enhance Efficiency |
title_full_unstemmed | Novel H6 Transformerless Inverter for Grid Connected Photovoltaic System to Reduce the Conduction Loss and Enhance Efficiency |
title_short | Novel H6 Transformerless Inverter for Grid Connected Photovoltaic System to Reduce the Conduction Loss and Enhance Efficiency |
title_sort | novel h6 transformerless inverter for grid connected photovoltaic system to reduce the conduction loss and enhance efficiency |
topic | transformerless inverter leakage current common mode voltage parasitic capacitance |
url | https://www.mdpi.com/1996-1073/15/10/3789 |
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