An Improved Transformerless Grid-Connected PV System With Related Control Strategy to Reduce Leakage Current, Extract Maximum Power Point and Control Power
The main purposes of a transformerless grid-connected photovoltaic (PV) system consist of the reduction of leakage current, extraction of maximum power point (MPP), tracking of MPP (MPPT), controlling the active and reactive powers, and having the unity power factor. To achieve the above-mentioned a...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Iran University of Science and Technology
2020-12-01
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| Series: | Iranian Journal of Electrical and Electronic Engineering |
| Subjects: | |
| Online Access: | http://ijeee.iust.ac.ir/article-1-1528-en.html |
| _version_ | 1818340705111638016 |
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| author | T. Ahmadzadeh E. Babaei M. Sabahi T. Abedinzadeh |
| author_facet | T. Ahmadzadeh E. Babaei M. Sabahi T. Abedinzadeh |
| author_sort | T. Ahmadzadeh |
| collection | DOAJ |
| description | The main purposes of a transformerless grid-connected photovoltaic (PV) system consist of the reduction of leakage current, extraction of maximum power point (MPP), tracking of MPP (MPPT), controlling the active and reactive powers, and having the unity power factor. To achieve the above-mentioned aims, the following actions have been performed in this paper. First of all, a brief analysis of the transformerless PV system has been done by using the conventional full-bridge (FB) topologies with two bipolar and unipolar PWM techniques. Then, an effective solution has been also introduced to significantly reduce the leakage current in the conventional H5 FB topology. Moreover, a proper control method has been proposed by using the combination of the fractional open-circuit voltage (FOCV) and the model predictive control (MPC) strategies to extract the MPP from PV panels, control the injection of the reactive power to the gird and have the unity power factor. At last, the simulation results performed in PSCAD software will be used to prove the correct performance of the proposed control method in the improved H5 FB topology. |
| first_indexed | 2024-12-13T15:47:08Z |
| format | Article |
| id | doaj.art-755da45f33e041569feec3e8bcbfb835 |
| institution | Directory Open Access Journal |
| issn | 1735-2827 2383-3890 |
| language | English |
| last_indexed | 2024-12-13T15:47:08Z |
| publishDate | 2020-12-01 |
| publisher | Iran University of Science and Technology |
| record_format | Article |
| series | Iranian Journal of Electrical and Electronic Engineering |
| spelling | doaj.art-755da45f33e041569feec3e8bcbfb8352022-12-21T23:39:40ZengIran University of Science and TechnologyIranian Journal of Electrical and Electronic Engineering1735-28272383-38902020-12-01164513523An Improved Transformerless Grid-Connected PV System With Related Control Strategy to Reduce Leakage Current, Extract Maximum Power Point and Control PowerT. Ahmadzadeh0E. Babaei1M. Sabahi2T. Abedinzadeh3 Department of Electrical Engineering, Shabestar Branch, Islamic Azad University, Shabestar, Iran. Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran. Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran. Department of Electrical Engineering, Shabestar Branch, Islamic Azad University, Shabestar, Iran. The main purposes of a transformerless grid-connected photovoltaic (PV) system consist of the reduction of leakage current, extraction of maximum power point (MPP), tracking of MPP (MPPT), controlling the active and reactive powers, and having the unity power factor. To achieve the above-mentioned aims, the following actions have been performed in this paper. First of all, a brief analysis of the transformerless PV system has been done by using the conventional full-bridge (FB) topologies with two bipolar and unipolar PWM techniques. Then, an effective solution has been also introduced to significantly reduce the leakage current in the conventional H5 FB topology. Moreover, a proper control method has been proposed by using the combination of the fractional open-circuit voltage (FOCV) and the model predictive control (MPC) strategies to extract the MPP from PV panels, control the injection of the reactive power to the gird and have the unity power factor. At last, the simulation results performed in PSCAD software will be used to prove the correct performance of the proposed control method in the improved H5 FB topology.http://ijeee.iust.ac.ir/article-1-1528-en.htmlfull bridge (fb) inverterh5 fb topologiesleakage currentpulse width modulation (pwm) techniquesbipolar pwm (bpwm) modulationunipolar pwm (upwm) modulationmaximum power point (mpp) trackingfractional open-circuit voltage (focv) techniquemod |
| spellingShingle | T. Ahmadzadeh E. Babaei M. Sabahi T. Abedinzadeh An Improved Transformerless Grid-Connected PV System With Related Control Strategy to Reduce Leakage Current, Extract Maximum Power Point and Control Power Iranian Journal of Electrical and Electronic Engineering full bridge (fb) inverter h5 fb topologies leakage current pulse width modulation (pwm) techniques bipolar pwm (bpwm) modulation unipolar pwm (upwm) modulation maximum power point (mpp) tracking fractional open-circuit voltage (focv) technique mod |
| title | An Improved Transformerless Grid-Connected PV System With Related Control Strategy to Reduce Leakage Current, Extract Maximum Power Point and Control Power |
| title_full | An Improved Transformerless Grid-Connected PV System With Related Control Strategy to Reduce Leakage Current, Extract Maximum Power Point and Control Power |
| title_fullStr | An Improved Transformerless Grid-Connected PV System With Related Control Strategy to Reduce Leakage Current, Extract Maximum Power Point and Control Power |
| title_full_unstemmed | An Improved Transformerless Grid-Connected PV System With Related Control Strategy to Reduce Leakage Current, Extract Maximum Power Point and Control Power |
| title_short | An Improved Transformerless Grid-Connected PV System With Related Control Strategy to Reduce Leakage Current, Extract Maximum Power Point and Control Power |
| title_sort | improved transformerless grid connected pv system with related control strategy to reduce leakage current extract maximum power point and control power |
| topic | full bridge (fb) inverter h5 fb topologies leakage current pulse width modulation (pwm) techniques bipolar pwm (bpwm) modulation unipolar pwm (upwm) modulation maximum power point (mpp) tracking fractional open-circuit voltage (focv) technique mod |
| url | http://ijeee.iust.ac.ir/article-1-1528-en.html |
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