A Common-Ground-Type Five-Level Inverter with Dynamic Voltage Boost
Today, transformerless inverters (TIs) are widely applicable in different solar photovoltaic (PV) grid-connected applications owing to their promising features, such as higher efficiency and power density. However, high-frequency common-mode voltage (CMV) in these topologies can result in high leaka...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/11/24/4174 |
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| author | Saifullah Kakar Shahrin Md. Ayob Sze Sing Lee M. Saad Bin Arif Norjulia Mohamad Nordin Reza Barzegarkhoo Yam P. Siwakoti |
| author_facet | Saifullah Kakar Shahrin Md. Ayob Sze Sing Lee M. Saad Bin Arif Norjulia Mohamad Nordin Reza Barzegarkhoo Yam P. Siwakoti |
| author_sort | Saifullah Kakar |
| collection | DOAJ |
| description | Today, transformerless inverters (TIs) are widely applicable in different solar photovoltaic (PV) grid-connected applications owing to their promising features, such as higher efficiency and power density. However, high-frequency common-mode voltage (CMV) in these topologies can result in high leakage current, electromagnetic interference, and lack of safety, reducing the whole system’s reliability. To resolve the problems associated with TIs, this paper proposes a novel hybrid switched capacitor (SC)-based common-ground (CG) transformerless inverter (TI) topology, which can be applied in grid-connected photovoltaic (PV) applications. The boost inductor is integrated to achieve continuous input current and dynamic voltage gain. In addition, the proposed circuit comprises nine switches and two SCs with a single input DC source. It can generate five-level AC voltage with voltage boosting within a single-stage DC–AC power conversion. The working principles of the proposed topology, circuit description, and control technique are presented. Furthermore, the proposed inverter is comprehensively compared with other five-level TIs to show its superiority. Finally, a laboratory prototype is developed and tested to validate the practical viability of the proposed configuration. |
| first_indexed | 2024-03-09T16:59:31Z |
| format | Article |
| id | doaj.art-82cf383eb23a4597bb9a477a77169e68 |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-09T16:59:31Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-82cf383eb23a4597bb9a477a77169e682023-11-24T14:31:39ZengMDPI AGElectronics2079-92922022-12-011124417410.3390/electronics11244174A Common-Ground-Type Five-Level Inverter with Dynamic Voltage BoostSaifullah Kakar0Shahrin Md. Ayob1Sze Sing Lee2M. Saad Bin Arif3Norjulia Mohamad Nordin4Reza Barzegarkhoo5Yam P. Siwakoti6School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, MalaysiaSchool of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, MalaysiaNewcastle Research & Innovation Institute, Newcastle University in Singapore (NUiS), SIT Building @ Nanyang Polytechnic, Singapore 567739, SingaporeDepartment of Electrical Engineering, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh 202002, IndiaSchool of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, MalaysiaFaculty of Engineering and Information Technology, University of Technology Sydney, Sydney, NSW 2007, AustraliaFaculty of Engineering and Information Technology, University of Technology Sydney, Sydney, NSW 2007, AustraliaToday, transformerless inverters (TIs) are widely applicable in different solar photovoltaic (PV) grid-connected applications owing to their promising features, such as higher efficiency and power density. However, high-frequency common-mode voltage (CMV) in these topologies can result in high leakage current, electromagnetic interference, and lack of safety, reducing the whole system’s reliability. To resolve the problems associated with TIs, this paper proposes a novel hybrid switched capacitor (SC)-based common-ground (CG) transformerless inverter (TI) topology, which can be applied in grid-connected photovoltaic (PV) applications. The boost inductor is integrated to achieve continuous input current and dynamic voltage gain. In addition, the proposed circuit comprises nine switches and two SCs with a single input DC source. It can generate five-level AC voltage with voltage boosting within a single-stage DC–AC power conversion. The working principles of the proposed topology, circuit description, and control technique are presented. Furthermore, the proposed inverter is comprehensively compared with other five-level TIs to show its superiority. Finally, a laboratory prototype is developed and tested to validate the practical viability of the proposed configuration.https://www.mdpi.com/2079-9292/11/24/4174common-ground invertersself-balancingswitched capacitorstransformerless invertersvoltage boost |
| spellingShingle | Saifullah Kakar Shahrin Md. Ayob Sze Sing Lee M. Saad Bin Arif Norjulia Mohamad Nordin Reza Barzegarkhoo Yam P. Siwakoti A Common-Ground-Type Five-Level Inverter with Dynamic Voltage Boost Electronics common-ground inverters self-balancing switched capacitors transformerless inverters voltage boost |
| title | A Common-Ground-Type Five-Level Inverter with Dynamic Voltage Boost |
| title_full | A Common-Ground-Type Five-Level Inverter with Dynamic Voltage Boost |
| title_fullStr | A Common-Ground-Type Five-Level Inverter with Dynamic Voltage Boost |
| title_full_unstemmed | A Common-Ground-Type Five-Level Inverter with Dynamic Voltage Boost |
| title_short | A Common-Ground-Type Five-Level Inverter with Dynamic Voltage Boost |
| title_sort | common ground type five level inverter with dynamic voltage boost |
| topic | common-ground inverters self-balancing switched capacitors transformerless inverters voltage boost |
| url | https://www.mdpi.com/2079-9292/11/24/4174 |
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