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A New Transformer-Less Five-Level Grid-Tied Inverter for Photovoltaic Applications.
- Source :
-
IEEE Transactions on Energy Conversion . Mar2020, Vol. 35 Issue 1, p106-118. 13p. - Publication Year :
- 2020
-
Abstract
- A new fundamental structure of a single-phase transformer-less grid connected multilevel inverter based on a switched-capacitor structure is presented in this study. By employing the series-parallel switching conversion of the integrated switched-capacitor module in a packed unit, attractive features for the proposed inverter can be obtained such as high efficiency and boosting ability within a single stage operation. Also, using a common grounding technique provides an additional advantage of reducing the leakage current. Moreover, the presented structure generates a multilevel waveform at the output voltage terminals which reduces the harmonics in the system. A peak current controller is utilized for triggering the gate of the power switches and controlling both the active and reactive powers. This results in a tightly controlled current with an appropriate quality that can be injected to the grid using a single source renewable energy resource. Operating procedures, design considerations, comparison studies and test results of a 620 W prototype are also presented to validate the accuracy and feasibility of the proposed multilevel inverter. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ELECTRIC inverters
*RENEWABLE energy sources
*REACTIVE power
Subjects
Details
- Language :
- English
- ISSN :
- 08858969
- Volume :
- 35
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Energy Conversion
- Publication Type :
- Academic Journal
- Accession number :
- 141884083
- Full Text :
- https://doi.org/10.1109/TEC.2019.2940539