| Autor: |
Yaroslav Y. Syasegov, Majid Farhangi, Reza Barzegarkhoo, Li Li, Dylan Dah-Chuan Lu, Ricardo P. Aguilera, Yam P. Siwakoti |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
IEEE Open Journal of Power Electronics, Vol 4, Pp 306-318 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2644-1314 |
| DOI: |
10.1109/OJPEL.2023.3265062 |
| Popis: |
Transformerless grid-connected inverters with highly efficient and reliable inverter concept (HERIC) and positive-negative neutral point-clamped (PN-NPC) circuit configurations exhibit excellent performance in terms of overall efficiency, common-mode voltage, and alleviated leakage current concern. These inverters are designed to generate only a three-level (3L) output voltage waveform, thereby reducing the power density of a conversion system. On the other hand, it is well-known that increasing the inverter output voltage levels entails the reduction of the output filter size. In this regard, this article aims to develop a five-level (5L) inverter output voltage for the improved versions of HERIC-clamped and original PN-NPC inverters. This is achieved with either phase-shifted or level-shifted pulse width modulation technique leading to further quality improvement of ac voltage and current waveforms through increasing the number of output voltage levels. Therefore, a much smaller output filter size can be utilized, while the overall efficiency of the entire system is enhanced. Two laboratory-built SiC-based prototypes for both the proposed HERIC-clamped (1.8 kW) and PN-NPC-5L (2 kW) inverters have been fabricated to show the feasibility and effectiveness of the proposed solution via experiments. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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